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version-up
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v0.5.0-bet
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28
Cargo.toml
28
Cargo.toml
@@ -26,22 +26,22 @@ members = [
|
||||
exclude = ["benchmarks", "examples"]
|
||||
|
||||
[workspace.package]
|
||||
version = "0.4.8"
|
||||
version = "0.5.0-beta"
|
||||
|
||||
[workspace.dependencies]
|
||||
leptos = { path = "./leptos", version = "0.4.8" }
|
||||
leptos_dom = { path = "./leptos_dom", version = "0.4.8" }
|
||||
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.4.8" }
|
||||
leptos_macro = { path = "./leptos_macro", version = "0.4.8" }
|
||||
leptos_reactive = { path = "./leptos_reactive", version = "0.4.8" }
|
||||
leptos_server = { path = "./leptos_server", version = "0.4.8" }
|
||||
server_fn = { path = "./server_fn", version = "0.4.8" }
|
||||
server_fn_macro = { path = "./server_fn_macro", version = "0.4.8" }
|
||||
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", version = "0.4.8" }
|
||||
leptos_config = { path = "./leptos_config", version = "0.4.8" }
|
||||
leptos_router = { path = "./router", version = "0.4.8" }
|
||||
leptos_meta = { path = "./meta", version = "0.4.8" }
|
||||
leptos_integration_utils = { path = "./integrations/utils", version = "0.4.8" }
|
||||
leptos = { path = "./leptos", version = "0.5.0-beta" }
|
||||
leptos_dom = { path = "./leptos_dom", version = "0.5.0-beta" }
|
||||
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.5.0-beta" }
|
||||
leptos_macro = { path = "./leptos_macro", version = "0.5.0-beta" }
|
||||
leptos_reactive = { path = "./leptos_reactive", version = "0.5.0-beta" }
|
||||
leptos_server = { path = "./leptos_server", version = "0.5.0-beta" }
|
||||
server_fn = { path = "./server_fn", version = "0.5.0-beta" }
|
||||
server_fn_macro = { path = "./server_fn_macro", version = "0.5.0-beta" }
|
||||
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", version = "0.5.0-beta" }
|
||||
leptos_config = { path = "./leptos_config", version = "0.5.0-beta" }
|
||||
leptos_router = { path = "./router", version = "0.5.0-beta" }
|
||||
leptos_meta = { path = "./meta", version = "0.5.0-beta" }
|
||||
leptos_integration_utils = { path = "./integrations/utils", version = "0.5.0-beta" }
|
||||
|
||||
[profile.release]
|
||||
codegen-units = 1
|
||||
|
||||
@@ -9,10 +9,10 @@ This document is intended as a running list of common issues, with example code
|
||||
**Issue**: Sometimes you want to update a reactive signal in a way that depends on another signal.
|
||||
|
||||
```rust
|
||||
let (a, set_a) = create_signal(cx, 0);
|
||||
let (b, set_b) = create_signal(cx, false);
|
||||
let (a, set_a) = create_signal(0);
|
||||
let (b, set_b) = create_signal(false);
|
||||
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
if a() > 5 {
|
||||
set_b(true);
|
||||
}
|
||||
@@ -24,7 +24,7 @@ This creates an inefficient chain of updates, and can easily lead to infinite lo
|
||||
**Solution**: Follow the rule, _What can be derived, should be derived._ In this case, this has the benefit of massively reducing the code size, too!
|
||||
|
||||
```rust
|
||||
let (a, set_a) = create_signal(cx, 0);
|
||||
let (a, set_a) = create_signal(0);
|
||||
let b = move || a () > 5;
|
||||
```
|
||||
|
||||
@@ -34,19 +34,19 @@ Sometimes you have nested signals: for example, hash-map that can change over ti
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let resources = create_rw_signal(cx, HashMap::new());
|
||||
pub fn App() -> impl IntoView {
|
||||
let resources = create_rw_signal(HashMap::new());
|
||||
|
||||
let update = move |id: usize| {
|
||||
resources.update(|resources| {
|
||||
resources
|
||||
.entry(id)
|
||||
.or_insert_with(|| create_rw_signal(cx, 0))
|
||||
.or_insert_with(|| create_rw_signal(0))
|
||||
.update(|amount| *amount += 1)
|
||||
})
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<pre>{move || format!("{:#?}", resources.get().into_iter().map(|(id, resource)| (id, resource.get())).collect::<Vec<_>>())}</pre>
|
||||
<button on:click=move |_| update(1)>"+"</button>
|
||||
@@ -55,17 +55,17 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
```
|
||||
|
||||
Clicking the button twice will cause a panic, because of the nested signal *read*. Calling the `update` function on `resources` immediately takes out a mutable borrow on `resources`, then updates the `resource` signal—which re-runs the effect that reads from the signals, which tries to immutably access `resources` and panics. It's the nested update here which causes a problem, because the inner update triggers and effect that tries to read both signals while the outer is still updating.
|
||||
Clicking the button twice will cause a panic, because of the nested signal _read_. Calling the `update` function on `resources` immediately takes out a mutable borrow on `resources`, then updates the `resource` signal—which re-runs the effect that reads from the signals, which tries to immutably access `resources` and panics. It's the nested update here which causes a problem, because the inner update triggers and effect that tries to read both signals while the outer is still updating.
|
||||
|
||||
You can fix this fairly easily by using the [`Scope::batch()`](https://docs.rs/leptos/latest/leptos/struct.Scope.html#method.batch) method:
|
||||
You can fix this fairly easily by using the [`batch()`](https://docs.rs/leptos/latest/leptos/fn.batch.html) method:
|
||||
|
||||
```rust
|
||||
let update = move |id: usize| {
|
||||
cx.batch(move || {
|
||||
batch(move || {
|
||||
resources.update(|resources| {
|
||||
resources
|
||||
.entry(id)
|
||||
.or_insert_with(|| create_rw_signal(cx, 0))
|
||||
.or_insert_with(|| create_rw_signal(0))
|
||||
.update(|amount| *amount += 1)
|
||||
})
|
||||
});
|
||||
@@ -83,11 +83,11 @@ Many DOM attributes can be updated either by setting an attribute on the DOM nod
|
||||
This means that in practice, attributes like `value` or `checked` on an `<input/>` element only update the _default_ value for the `<input/>`. If you want to reactively update the value, you should use `prop:value` instead to set the `value` property.
|
||||
|
||||
```rust
|
||||
let (a, set_a) = create_signal(cx, "Starting value".to_string());
|
||||
let (a, set_a) = create_signal("Starting value".to_string());
|
||||
let on_input = move |ev| set_a(event_target_value(&ev));
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
// ❌ reactivity doesn't work as expected: typing only updates the default
|
||||
// of each input, so if you start typing in the second input, it won't
|
||||
// update the first one
|
||||
@@ -97,11 +97,11 @@ view! {
|
||||
```
|
||||
|
||||
```rust
|
||||
let (a, set_a) = create_signal(cx, "Starting value".to_string());
|
||||
let (a, set_a) = create_signal("Starting value".to_string());
|
||||
let on_input = move |ev| set_a(event_target_value(&ev));
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
// ✅ works as intended by setting the value *property*
|
||||
<input prop:value=a on:input=on_input />
|
||||
<input prop:value=a on:input=on_input />
|
||||
|
||||
@@ -27,6 +27,7 @@ cargo add leptos --features=csr,nightly
|
||||
```
|
||||
|
||||
Or you can leave off `nightly` if you're using stable Rust
|
||||
|
||||
```bash
|
||||
cargo add leptos --features=csr
|
||||
```
|
||||
@@ -64,7 +65,7 @@ And add a simple “Hello, world!” to your `main.rs`
|
||||
use leptos::*;
|
||||
|
||||
fn main() {
|
||||
mount_to_body(|cx| view! { cx, <p>"Hello, world!"</p> })
|
||||
mount_to_body(|| view! { <p>"Hello, world!"</p> })
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
@@ -29,15 +29,15 @@ all its children and descendants using `provide_context`.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
fn App() -> impl IntoView {
|
||||
// here we create a signal in the root that can be consumed
|
||||
// anywhere in the app.
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
// we'll pass the setter to specific components,
|
||||
// but provide the count itself to the whole app via context
|
||||
provide_context(cx, count);
|
||||
provide_context(count);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
// SetterButton is allowed to modify the count
|
||||
<SetterButton set_count/>
|
||||
// These consumers can only read from it
|
||||
@@ -57,14 +57,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
```rust
|
||||
/// A component that does some "fancy" math with the global count
|
||||
#[component]
|
||||
fn FancyMath(cx: Scope) -> impl IntoView {
|
||||
fn FancyMath() -> impl IntoView {
|
||||
// here we consume the global count signal with `use_context`
|
||||
let count = use_context::<ReadSignal<u32>>(cx)
|
||||
let count = use_context::<ReadSignal<u32>>()
|
||||
// we know we just provided this in the parent component
|
||||
.expect("there to be a `count` signal provided");
|
||||
let is_even = move || count() & 1 == 0;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer blue">
|
||||
"The number "
|
||||
<strong>{count}</strong>
|
||||
@@ -89,17 +89,17 @@ struct GlobalState {
|
||||
}
|
||||
|
||||
impl GlobalState {
|
||||
pub fn new(cx: Scope) -> Self {
|
||||
pub fn new() -> Self {
|
||||
Self {
|
||||
count: create_rw_signal(cx, 0),
|
||||
name: create_rw_signal(cx, "Bob".to_string())
|
||||
count: create_rw_signal(0),
|
||||
name: create_rw_signal("Bob".to_string())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
provide_context(cx, GlobalState::new(cx));
|
||||
fn App() -> impl IntoView {
|
||||
provide_context(GlobalState::new());
|
||||
|
||||
// etc.
|
||||
}
|
||||
@@ -117,8 +117,8 @@ struct GlobalState {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
provide_context(cx, create_rw_signal(GlobalState::default()));
|
||||
fn App() -> impl IntoView {
|
||||
provide_context(create_rw_signal(GlobalState::default()));
|
||||
|
||||
// etc.
|
||||
}
|
||||
@@ -127,8 +127,8 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
But there’s a problem: because our whole state is wrapped in one signal, updating the value of one field will cause reactive updates in parts of the UI that only depend on the other.
|
||||
|
||||
```rust
|
||||
let state = expect_context::<RwSignal<GlobalState>>(cx);
|
||||
view! { cx,
|
||||
let state = expect_context::<RwSignal<GlobalState>>();
|
||||
view! {
|
||||
<button on:click=move |_| state.update(|n| *n += 1)>"+1"</button>
|
||||
<p>{move || state.with(|state| state.name.clone())}</p>
|
||||
}
|
||||
@@ -143,12 +143,12 @@ Here, instead of reading from the state signal directly, we create “slices”
|
||||
```rust
|
||||
/// A component that updates the count in the global state.
|
||||
#[component]
|
||||
fn GlobalStateCounter(cx: Scope) -> impl IntoView {
|
||||
let state = expect_context::<RwSignal<GlobalState>>(cx);
|
||||
fn GlobalStateCounter() -> impl IntoView {
|
||||
let state = expect_context::<RwSignal<GlobalState>>();
|
||||
|
||||
// `create_slice` lets us create a "lens" into the data
|
||||
let (count, set_count) = create_slice(
|
||||
cx,
|
||||
|
||||
// we take a slice *from* `state`
|
||||
state,
|
||||
// our getter returns a "slice" of the data
|
||||
@@ -157,7 +157,7 @@ fn GlobalStateCounter(cx: Scope) -> impl IntoView {
|
||||
|state, n| state.count = n,
|
||||
);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer blue">
|
||||
<button
|
||||
on:click=move |_| {
|
||||
@@ -214,15 +214,15 @@ use leptos::*;
|
||||
// components using provide_context(). Changing it will only cause rerendering
|
||||
// in the specific places it is actually used, not the whole app.
|
||||
#[component]
|
||||
fn Option2(cx: Scope) -> impl IntoView {
|
||||
fn Option2() -> impl IntoView {
|
||||
// here we create a signal in the root that can be consumed
|
||||
// anywhere in the app.
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
// we'll pass the setter to specific components,
|
||||
// but provide the count itself to the whole app via context
|
||||
provide_context(cx, count);
|
||||
provide_context(count);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Option 2: Passing Signals"</h1>
|
||||
// SetterButton is allowed to modify the count
|
||||
<SetterButton set_count/>
|
||||
@@ -237,8 +237,8 @@ fn Option2(cx: Scope) -> impl IntoView {
|
||||
|
||||
/// A button that increments our global counter.
|
||||
#[component]
|
||||
fn SetterButton(cx: Scope, set_count: WriteSignal<u32>) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn SetterButton(set_count: WriteSignal<u32>) -> impl IntoView {
|
||||
view! {
|
||||
<div class="provider red">
|
||||
<button on:click=move |_| set_count.update(|count| *count += 1)>
|
||||
"Increment Global Count"
|
||||
@@ -249,14 +249,14 @@ fn SetterButton(cx: Scope, set_count: WriteSignal<u32>) -> impl IntoView {
|
||||
|
||||
/// A component that does some "fancy" math with the global count
|
||||
#[component]
|
||||
fn FancyMath(cx: Scope) -> impl IntoView {
|
||||
fn FancyMath() -> impl IntoView {
|
||||
// here we consume the global count signal with `use_context`
|
||||
let count = use_context::<ReadSignal<u32>>(cx)
|
||||
let count = use_context::<ReadSignal<u32>>()
|
||||
// we know we just provided this in the parent component
|
||||
.expect("there to be a `count` signal provided");
|
||||
let is_even = move || count() & 1 == 0;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer blue">
|
||||
"The number "
|
||||
<strong>{count}</strong>
|
||||
@@ -272,17 +272,17 @@ fn FancyMath(cx: Scope) -> impl IntoView {
|
||||
|
||||
/// A component that shows a list of items generated from the global count.
|
||||
#[component]
|
||||
fn ListItems(cx: Scope) -> impl IntoView {
|
||||
fn ListItems() -> impl IntoView {
|
||||
// again, consume the global count signal with `use_context`
|
||||
let count = use_context::<ReadSignal<u32>>(cx).expect("there to be a `count` signal provided");
|
||||
let count = use_context::<ReadSignal<u32>>().expect("there to be a `count` signal provided");
|
||||
|
||||
let squares = move || {
|
||||
(0..count())
|
||||
.map(|n| view! { cx, <li>{n}<sup>"2"</sup> " is " {n * n}</li> })
|
||||
.map(|n| view! { <li>{n}<sup>"2"</sup> " is " {n * n}</li> })
|
||||
.collect::<Vec<_>>()
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer green">
|
||||
<ul>{squares}</ul>
|
||||
</div>
|
||||
@@ -304,13 +304,13 @@ struct GlobalState {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Option3(cx: Scope) -> impl IntoView {
|
||||
fn Option3() -> impl IntoView {
|
||||
// we'll provide a single signal that holds the whole state
|
||||
// each component will be responsible for creating its own "lens" into it
|
||||
let state = create_rw_signal(cx, GlobalState::default());
|
||||
provide_context(cx, state);
|
||||
let state = create_rw_signal(GlobalState::default());
|
||||
provide_context(state);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Option 3: Passing Signals"</h1>
|
||||
<div class="red consumer" style="width: 100%">
|
||||
<h2>"Current Global State"</h2>
|
||||
@@ -329,12 +329,12 @@ fn Option3(cx: Scope) -> impl IntoView {
|
||||
|
||||
/// A component that updates the count in the global state.
|
||||
#[component]
|
||||
fn GlobalStateCounter(cx: Scope) -> impl IntoView {
|
||||
let state = use_context::<RwSignal<GlobalState>>(cx).expect("state to have been provided");
|
||||
fn GlobalStateCounter() -> impl IntoView {
|
||||
let state = use_context::<RwSignal<GlobalState>>().expect("state to have been provided");
|
||||
|
||||
// `create_slice` lets us create a "lens" into the data
|
||||
let (count, set_count) = create_slice(
|
||||
cx,
|
||||
|
||||
// we take a slice *from* `state`
|
||||
state,
|
||||
// our getter returns a "slice" of the data
|
||||
@@ -343,7 +343,7 @@ fn GlobalStateCounter(cx: Scope) -> impl IntoView {
|
||||
|state, n| state.count = n,
|
||||
);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer blue">
|
||||
<button
|
||||
on:click=move |_| {
|
||||
@@ -360,14 +360,14 @@ fn GlobalStateCounter(cx: Scope) -> impl IntoView {
|
||||
|
||||
/// A component that updates the count in the global state.
|
||||
#[component]
|
||||
fn GlobalStateInput(cx: Scope) -> impl IntoView {
|
||||
let state = use_context::<RwSignal<GlobalState>>(cx).expect("state to have been provided");
|
||||
fn GlobalStateInput() -> impl IntoView {
|
||||
let state = use_context::<RwSignal<GlobalState>>().expect("state to have been provided");
|
||||
|
||||
// this slice is completely independent of the `count` slice
|
||||
// that we created in the other component
|
||||
// neither of them will cause the other to rerun
|
||||
let (name, set_name) = create_slice(
|
||||
cx,
|
||||
|
||||
// we take a slice *from* `state`
|
||||
state,
|
||||
// our getter returns a "slice" of the data
|
||||
@@ -376,7 +376,7 @@ fn GlobalStateInput(cx: Scope) -> impl IntoView {
|
||||
|state, n| state.name = n,
|
||||
);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="consumer green">
|
||||
<input
|
||||
type="text"
|
||||
@@ -395,7 +395,7 @@ fn GlobalStateInput(cx: Scope) -> impl IntoView {
|
||||
// Because we defined it as `fn App`, we can now use it in a
|
||||
// template as <App/>
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <Option2/><Option3/> })
|
||||
leptos::mount_to_body(|| view! { <Option2/><Option3/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -2,7 +2,7 @@
|
||||
|
||||
A [Resource](https://docs.rs/leptos/latest/leptos/struct.Resource.html) is a reactive data structure that reflects the current state of an asynchronous task, allowing you to integrate asynchronous `Future`s into the synchronous reactive system. Rather than waiting for its data to load with `.await`, you transform the `Future` into a signal that returns `Some(T)` if it has resolved, and `None` if it’s still pending.
|
||||
|
||||
You do this by using the [`create_resource`](https://docs.rs/leptos/latest/leptos/fn.create_resource.html) function. This takes two arguments (other than the ubiquitous `cx`):
|
||||
You do this by using the [`create_resource`](https://docs.rs/leptos/latest/leptos/fn.create_resource.html) function. This takes two arguments:
|
||||
|
||||
1. a source signal, which will generate a new `Future` whenever it changes
|
||||
2. a fetcher function, which takes the data from that signal and returns a `Future`
|
||||
@@ -11,10 +11,10 @@ Here’s an example
|
||||
|
||||
```rust
|
||||
// our source signal: some synchronous, local state
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// our resource
|
||||
let async_data = create_resource(cx,
|
||||
let async_data = create_resource(
|
||||
count,
|
||||
// every time `count` changes, this will run
|
||||
|value| async move {
|
||||
@@ -27,23 +27,20 @@ let async_data = create_resource(cx,
|
||||
To create a resource that simply runs once, you can pass a non-reactive, empty source signal:
|
||||
|
||||
```rust
|
||||
let once = create_resource(cx, || (), |_| async move { load_data().await });
|
||||
let once = create_resource(|| (), |_| async move { load_data().await });
|
||||
```
|
||||
|
||||
To access the value you can use `.read(cx)` or `.with(cx, |data| /* */)`. These work just like `.get()` and `.with()` on a signal—`read` clones the value and returns it, `with` applies a closure to it—but with two differences
|
||||
|
||||
1. For any `Resource<_, T>`, they always return `Option<T>`, not `T`: because it’s always possible that your resource is still loading.
|
||||
2. They take a `Scope` argument. You’ll see why in the next chapter, on `<Suspense/>`.
|
||||
To access the value you can use `.read()` or `.with(|data| /* */)`. These work just like `.get()` and `.with()` on a signal—`read` clones the value and returns it, `with` applies a closure to it—but for any `Resource<_, T>`, they always return `Option<T>`, not `T`: because it’s always possible that your resource is still loading.
|
||||
|
||||
So, you can show the current state of a resource in your view:
|
||||
|
||||
```rust
|
||||
let once = create_resource(cx, || (), |_| async move { load_data().await });
|
||||
view! { cx,
|
||||
let once = create_resource(|| (), |_| async move { load_data().await });
|
||||
view! {
|
||||
<h1>"My Data"</h1>
|
||||
{move || match once.read(cx) {
|
||||
None => view! { cx, <p>"Loading..."</p> }.into_view(cx),
|
||||
Some(data) => view! { cx, <ShowData data/> }.into_view(cx)
|
||||
{move || match once.read() {
|
||||
None => view! { <p>"Loading..."</p> }.into_view(),
|
||||
Some(data) => view! { <ShowData data/> }.into_view()
|
||||
}}
|
||||
}
|
||||
```
|
||||
@@ -71,13 +68,13 @@ async fn load_data(value: i32) -> i32 {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
fn App() -> impl IntoView {
|
||||
// this count is our synchronous, local state
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// create_resource takes two arguments after its scope
|
||||
let async_data = create_resource(
|
||||
cx,
|
||||
|
||||
// the first is the "source signal"
|
||||
count,
|
||||
// the second is the loader
|
||||
@@ -90,14 +87,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
// you can also create resources that only load once
|
||||
// just return the unit type () from the source signal
|
||||
// that doesn't depend on anything: we just load it once
|
||||
let stable = create_resource(cx, || (), |_| async move { load_data(1).await });
|
||||
let stable = create_resource(|| (), |_| async move { load_data(1).await });
|
||||
|
||||
// we can access the resource values with .read()
|
||||
// this will reactively return None before the Future has resolved
|
||||
// and update to Some(T) when it has resolved
|
||||
let async_result = move || {
|
||||
async_data
|
||||
.read(cx)
|
||||
.read()
|
||||
.map(|value| format!("Server returned {value:?}"))
|
||||
// This loading state will only show before the first load
|
||||
.unwrap_or_else(|| "Loading...".into())
|
||||
@@ -108,7 +105,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
let loading = async_data.loading();
|
||||
let is_loading = move || if loading() { "Loading..." } else { "Idle." };
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| {
|
||||
set_count.update(|n| *n += 1);
|
||||
@@ -117,7 +114,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
"Click me"
|
||||
</button>
|
||||
<p>
|
||||
<code>"stable"</code>": " {move || stable.read(cx)}
|
||||
<code>"stable"</code>": " {move || stable.read()}
|
||||
</p>
|
||||
<p>
|
||||
<code>"count"</code>": " {count}
|
||||
@@ -132,7 +129,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -3,14 +3,14 @@
|
||||
In the previous chapter, we showed how you can create a simple loading screen to show some fallback while a resource is loading.
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let a = create_resource(cx, count, |count| async move { load_a(count).await });
|
||||
let (count, set_count) = create_signal(0);
|
||||
let a = create_resource(count, |count| async move { load_a(count).await });
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"My Data"</h1>
|
||||
{move || match once.read(cx) {
|
||||
None => view! { cx, <p>"Loading..."</p> }.into_view(cx),
|
||||
Some(data) => view! { cx, <ShowData data/> }.into_view(cx)
|
||||
{move || match once.read() {
|
||||
None => view! { <p>"Loading..."</p> }.into_view(),
|
||||
Some(data) => view! { <ShowData data/> }.into_view()
|
||||
}}
|
||||
}
|
||||
```
|
||||
@@ -18,19 +18,19 @@ view! { cx,
|
||||
But what if we have two resources, and want to wait for both of them?
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count2, set_count2) = create_signal(cx, 0);
|
||||
let a = create_resource(cx, count, |count| async move { load_a(count).await });
|
||||
let b = create_resource(cx, count2, |count| async move { load_b(count).await });
|
||||
let (count, set_count) = create_signal(0);
|
||||
let (count2, set_count2) = create_signal(0);
|
||||
let a = create_resource(count, |count| async move { load_a(count).await });
|
||||
let b = create_resource(count2, |count| async move { load_b(count).await });
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"My Data"</h1>
|
||||
{move || match (a.read(cx), b.read(cx)) {
|
||||
(Some(a), Some(b)) => view! { cx,
|
||||
{move || match (a.read(), b.read()) {
|
||||
(Some(a), Some(b)) => view! {
|
||||
<ShowA a/>
|
||||
<ShowA b/>
|
||||
}.into_view(cx),
|
||||
_ => view! { cx, <p>"Loading..."</p> }.into_view(cx)
|
||||
}.into_view(),
|
||||
_ => view! { <p>"Loading..."</p> }.into_view()
|
||||
}}
|
||||
}
|
||||
```
|
||||
@@ -40,26 +40,26 @@ That’s not _so_ bad, but it’s kind of annoying. What if we could invert the
|
||||
The [`<Suspense/>`](https://docs.rs/leptos/latest/leptos/fn.Suspense.html) component lets us do exactly that. You give it a `fallback` prop and children, one or more of which usually involves reading from a resource. Reading from a resource “under” a `<Suspense/>` (i.e., in one of its children) registers that resource with the `<Suspense/>`. If it’s still waiting for resources to load, it shows the `fallback`. When they’ve all loaded, it shows the children.
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count2, set_count2) = create_signal(cx, 0);
|
||||
let a = create_resource(cx, count, |count| async move { load_a(count).await });
|
||||
let b = create_resource(cx, count2, |count| async move { load_b(count).await });
|
||||
let (count, set_count) = create_signal(0);
|
||||
let (count2, set_count2) = create_signal(0);
|
||||
let a = create_resource(count, |count| async move { load_a(count).await });
|
||||
let b = create_resource(count2, |count| async move { load_b(count).await });
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"My Data"</h1>
|
||||
<Suspense
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
>
|
||||
<h2>"My Data"</h2>
|
||||
<h3>"A"</h3>
|
||||
{move || {
|
||||
a.read(cx)
|
||||
.map(|a| view! { cx, <ShowA a/> })
|
||||
a.read()
|
||||
.map(|a| view! { <ShowA a/> })
|
||||
}}
|
||||
<h3>"B"</h3>
|
||||
{move || {
|
||||
b.read(cx)
|
||||
.map(|b| view! { cx, <ShowB b/> })
|
||||
b.read()
|
||||
.map(|b| view! { <ShowB b/> })
|
||||
}}
|
||||
</Suspense>
|
||||
}
|
||||
@@ -86,17 +86,17 @@ async fn important_api_call(name: String) -> String {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (name, set_name) = create_signal(cx, "Bill".to_string());
|
||||
fn App() -> impl IntoView {
|
||||
let (name, set_name) = create_signal("Bill".to_string());
|
||||
|
||||
// this will reload every time `name` changes
|
||||
let async_data = create_resource(
|
||||
cx,
|
||||
|
||||
name,
|
||||
|name| async move { important_api_call(name).await },
|
||||
);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<input
|
||||
on:input=move |ev| {
|
||||
set_name(event_target_value(&ev));
|
||||
@@ -107,20 +107,20 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<Suspense
|
||||
// the fallback will show whenever a resource
|
||||
// read "under" the suspense is loading
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
>
|
||||
// the children will be rendered once initially,
|
||||
// and then whenever any resources has been resolved
|
||||
<p>
|
||||
"Your shouting name is "
|
||||
{move || async_data.read(cx)}
|
||||
{move || async_data.read()}
|
||||
</p>
|
||||
</Suspense>
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -29,13 +29,13 @@ async fn important_api_call(id: usize) -> String {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (tab, set_tab) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (tab, set_tab) = create_signal(0);
|
||||
|
||||
// this will reload every time `tab` changes
|
||||
let user_data = create_resource(cx, tab, |tab| async move { important_api_call(tab).await });
|
||||
let user_data = create_resource(tab, |tab| async move { important_api_call(tab).await });
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="buttons">
|
||||
<button
|
||||
on:click=move |_| set_tab(0)
|
||||
@@ -65,17 +65,17 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
// the fallback will show initially
|
||||
// on subsequent reloads, the current child will
|
||||
// continue showing
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
>
|
||||
<p>
|
||||
{move || user_data.read(cx)}
|
||||
{move || user_data.read()}
|
||||
</p>
|
||||
</Transition>
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -16,22 +16,22 @@ async fn add_todo_request(new_title: &str) -> Uuid {
|
||||
}
|
||||
```
|
||||
|
||||
`create_action` takes a reactive `Scope` and an `async` function that takes a reference to a single argument, which you could think of as its “input type.”
|
||||
`create_action` takes an `async` function that takes a reference to a single argument, which you could think of as its “input type.”
|
||||
|
||||
> The input is always a single type. If you want to pass in multiple arguments, you can do it with a struct or tuple.
|
||||
>
|
||||
> ```rust
|
||||
> // if there's a single argument, just use that
|
||||
> let action1 = create_action(cx, |input: &String| {
|
||||
> let action1 = create_action(|input: &String| {
|
||||
> let input = input.clone();
|
||||
> async move { todo!() }
|
||||
> });
|
||||
>
|
||||
> // if there are no arguments, use the unit type `()`
|
||||
> let action2 = create_action(cx, |input: &()| async { todo!() });
|
||||
> let action2 = create_action(|input: &()| async { todo!() });
|
||||
>
|
||||
> // if there are multiple arguments, use a tuple
|
||||
> let action3 = create_action(cx,
|
||||
> let action3 = create_action(
|
||||
> |input: &(usize, String)| async { todo!() }
|
||||
> );
|
||||
> ```
|
||||
@@ -41,7 +41,7 @@ async fn add_todo_request(new_title: &str) -> Uuid {
|
||||
So in this case, all we need to do to create an action is
|
||||
|
||||
```rust
|
||||
let add_todo_action = create_action(cx, |input: &String| {
|
||||
let add_todo_action = create_action(|input: &String| {
|
||||
let input = input.to_owned();
|
||||
async move { add_todo_request(&input).await }
|
||||
});
|
||||
@@ -66,9 +66,9 @@ let todo_id = add_todo_action.value(); // RwSignal<Option<Uuid>>
|
||||
This makes it easy to track the current state of your request, show a loading indicator, or do “optimistic UI” based on the assumption that the submission will succeed.
|
||||
|
||||
```rust
|
||||
let input_ref = create_node_ref::<Input>(cx);
|
||||
let input_ref = create_node_ref::<Input>();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<form
|
||||
on:submit=move |ev| {
|
||||
ev.prevent_default(); // don't reload the page...
|
||||
@@ -116,10 +116,10 @@ async fn add_todo(text: &str) -> Uuid {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
fn App() -> impl IntoView {
|
||||
// an action takes an async function with single argument
|
||||
// it can be a simple type, a struct, or ()
|
||||
let add_todo = create_action(cx, |input: &String| {
|
||||
let add_todo = create_action(|input: &String| {
|
||||
// the input is a reference, but we need the Future to own it
|
||||
// this is important: we need to clone and move into the Future
|
||||
// so it has a 'static lifetime
|
||||
@@ -133,9 +133,9 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
let pending = add_todo.pending();
|
||||
let todo_id = add_todo.value();
|
||||
|
||||
let input_ref = create_node_ref::<Input>(cx);
|
||||
let input_ref = create_node_ref::<Input>();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<form
|
||||
on:submit=move |ev| {
|
||||
ev.prevent_default(); // don't reload the page...
|
||||
@@ -168,7 +168,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
@@ -7,12 +7,12 @@ As you build components you may occasionally find yourself wanting to “project
|
||||
Consider the following:
|
||||
|
||||
```rust
|
||||
pub fn LoggedIn<F, IV>(cx: Scope, fallback: F, children: ChildrenFn) -> impl IntoView
|
||||
pub fn LoggedIn<F, IV>(fallback: F, children: ChildrenFn) -> impl IntoView
|
||||
where
|
||||
F: Fn(Scope) -> IV + 'static,
|
||||
F: Fn() -> IV + 'static,
|
||||
IV: IntoView,
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<Suspense
|
||||
fallback=|| ()
|
||||
>
|
||||
@@ -22,7 +22,7 @@ where
|
||||
when=move || todo!()
|
||||
fallback=fallback
|
||||
>
|
||||
{children(cx)}
|
||||
{children()}
|
||||
</Show>
|
||||
</Suspense>
|
||||
}
|
||||
@@ -50,18 +50,18 @@ If you want to really understand the issue here, it may help to look at the expa
|
||||
|
||||
```rust
|
||||
Suspense(
|
||||
cx,
|
||||
|
||||
::leptos::component_props_builder(&Suspense)
|
||||
.fallback(|| ())
|
||||
.children({
|
||||
// fallback and children are moved into this closure
|
||||
Box::new(move |cx| {
|
||||
Box::new(move || {
|
||||
{
|
||||
// fallback and children captured here
|
||||
leptos::Fragment::lazy(|| {
|
||||
vec![
|
||||
(Show(
|
||||
cx,
|
||||
|
||||
::leptos::component_props_builder(&Show)
|
||||
.when(|| true)
|
||||
// but fallback is moved into Show here
|
||||
@@ -70,7 +70,7 @@ Suspense(
|
||||
.children(children)
|
||||
.build(),
|
||||
)
|
||||
.into_view(cx)),
|
||||
.into_view()),
|
||||
]
|
||||
})
|
||||
}
|
||||
@@ -91,22 +91,22 @@ We can solve this problem by using the [`store_value`](https://docs.rs/leptos/la
|
||||
In this case, it’s really simple:
|
||||
|
||||
```rust
|
||||
pub fn LoggedIn<F, IV>(cx: Scope, fallback: F, children: ChildrenFn) -> impl IntoView
|
||||
pub fn LoggedIn<F, IV>(F, children: ChildrenFn) -> impl IntoView
|
||||
where
|
||||
F: Fn(Scope) -> IV + 'static,
|
||||
F: Fn() -> IV + 'static,
|
||||
IV: IntoView,
|
||||
{
|
||||
let fallback = store_value(cx, fallback);
|
||||
let children = store_value(cx, children);
|
||||
view! { cx,
|
||||
let fallback = store_value(fallback);
|
||||
let children = store_value(children);
|
||||
view! {
|
||||
<Suspense
|
||||
fallback=|| ()
|
||||
>
|
||||
<Show
|
||||
when=|| todo!()
|
||||
fallback=move |cx| fallback.with_value(|fallback| fallback(cx))
|
||||
fallback=move || fallback.with_value(|fallback| fallback())
|
||||
>
|
||||
{children.with_value(|children| children(cx))}
|
||||
{children.with_value(|children| children())}
|
||||
</Show>
|
||||
</Suspense>
|
||||
}
|
||||
@@ -125,9 +125,9 @@ Consider this example
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
let name = "Alice".to_string();
|
||||
view! { cx,
|
||||
view! {
|
||||
<Outer>
|
||||
<Inner>
|
||||
<Inmost name=name.clone()/>
|
||||
@@ -137,18 +137,18 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Outer(cx: Scope, children: ChildrenFn) -> impl IntoView {
|
||||
children(cx)
|
||||
pub fn Outer(ChildrenFn) -> impl IntoView {
|
||||
children()
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Inner(cx: Scope, children: ChildrenFn) -> impl IntoView {
|
||||
children(cx)
|
||||
pub fn Inner(ChildrenFn) -> impl IntoView {
|
||||
children()
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Inmost(cx: Scope, name: String) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Inmost(ng) -> impl IntoView {
|
||||
view! {
|
||||
<p>{name}</p>
|
||||
}
|
||||
}
|
||||
@@ -165,7 +165,7 @@ It’s captured through multiple levels of children that need to run more than o
|
||||
In this case, the `clone:` syntax comes in handy. Calling `clone:name` will clone `name` _before_ moving it into `<Inner/>`’s children, which solves our ownership issue.
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<Outer>
|
||||
<Inner clone:name>
|
||||
<Inmost name=name.clone()/>
|
||||
|
||||
@@ -14,10 +14,10 @@ This allows you to write components like this:
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn Home(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn Home() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<main class="my-0 mx-auto max-w-3xl text-center">
|
||||
<h2 class="p-6 text-4xl">"Welcome to Leptos with Tailwind"</h2>
|
||||
<p class="px-10 pb-10 text-left">"Tailwind will scan your Rust files for Tailwind class names and compile them into a CSS file."</p>
|
||||
@@ -48,7 +48,7 @@ This allows you to write components like this:
|
||||
use stylers::style;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
let styler_class = style! { "App",
|
||||
#two{
|
||||
color: blue;
|
||||
@@ -74,7 +74,7 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
};
|
||||
|
||||
view! { cx, class = styler_class,
|
||||
view! { class = styler_class,
|
||||
<div class="one">
|
||||
<h1 id="two">"Hello"</h1>
|
||||
<h2>"World"</h2>
|
||||
@@ -93,7 +93,7 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
use styled::style;
|
||||
|
||||
#[component]
|
||||
pub fn MyComponent(cx: Scope) -> impl IntoView {
|
||||
pub fn MyComponent() -> impl IntoView {
|
||||
let styles = style!(
|
||||
div {
|
||||
background-color: red;
|
||||
@@ -101,7 +101,7 @@ pub fn MyComponent(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
);
|
||||
|
||||
styled::view! { cx, styles,
|
||||
styled::view! { styles,
|
||||
<div>"This text should be red with white text."</div>
|
||||
}
|
||||
}
|
||||
|
||||
@@ -3,12 +3,13 @@
|
||||
[`<ActionForm/>`](https://docs.rs/leptos_router/latest/leptos_router/fn.ActionForm.html) is a specialized `<Form/>` that takes a server action, and automatically dispatches it on form submission. This allows you to call a server function directly from a `<form>`, even without JS/WASM.
|
||||
|
||||
The process is simple:
|
||||
|
||||
1. Define a server function using the [`#[server]` macro](https://docs.rs/leptos/latest/leptos/attr.server.html) (see [Server Functions](../server/25_server_functions.md).)
|
||||
2. Create an action using [`create_server_action`](https://docs.rs/leptos/latest/leptos/fn.create_server_action.html), specifying the type of the server function you’ve defined.
|
||||
3. Create an `<ActionForm/>`, providing the server action in the `action` prop.
|
||||
4. Pass the named arguments to the server function as form fields with the same names.
|
||||
|
||||
> **Note:** `<ActionForm/>` only works with the default URL-encoded `POST` encoding for server functions, to ensure graceful degradation/correct behavior as an HTML form.
|
||||
> **Note:** `<ActionForm/>` only works with the default URL-encoded `POST` encoding for server functions, to ensure graceful degradation/correct behavior as an HTML form.
|
||||
|
||||
```rust
|
||||
#[server(AddTodo, "/api")]
|
||||
@@ -17,14 +18,14 @@ pub async fn add_todo(title: String) -> Result<(), ServerFnError> {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn AddTodo(cx: Scope) -> impl IntoView {
|
||||
let add_todo = create_server_action::<AddTodo>(cx);
|
||||
fn AddTodo() -> impl IntoView {
|
||||
let add_todo = create_server_action::<AddTodo>();
|
||||
// holds the latest *returned* value from the server
|
||||
let value = add_todo.value();
|
||||
// check if the server has returned an error
|
||||
let has_error = move || value.with(|val| matches!(val, Some(Err(_))));
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<ActionForm action=add_todo>
|
||||
<label>
|
||||
"Add a Todo"
|
||||
@@ -36,6 +37,7 @@ fn AddTodo(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
It’s really that easy. With JS/WASM, your form will submit without a page reload, storing its most recent submission in the `.input()` signal of the action, its pending status in `.pending()`, and so on. (See the [`Action`](https://docs.rs/leptos/latest/leptos/struct.Action.html) docs for a refresher, if you need.) Without JS/WASM, your form will submit with a page reload. If you call a `redirect` function (from `leptos_axum` or `leptos_actix`) it will redirect to the correct page. By default, it will redirect back to the page you’re currently on. The power of HTML, HTTP, and isomorphic rendering mean that your `<ActionForm/>` simply works, even with no JS/WASM.
|
||||
|
||||
## Client-Side Validation
|
||||
@@ -53,4 +55,4 @@ let on_submit = move |ev| {
|
||||
ev.prevent_default();
|
||||
}
|
||||
}
|
||||
```
|
||||
```
|
||||
|
||||
@@ -9,10 +9,10 @@ Hidden behind the whole reactive DOM renderer that we’ve seen so far is a func
|
||||
[`create_effect`](https://docs.rs/leptos_reactive/latest/leptos_reactive/fn.create_effect.html) takes a function as its argument. It immediately runs the function. If you access any reactive signal inside that function, it registers the fact that the effect depends on that signal with the reactive runtime. Whenever one of the signals that the effect depends on changes, the effect runs again.
|
||||
|
||||
```rust
|
||||
let (a, set_a) = create_signal(cx, 0);
|
||||
let (b, set_b) = create_signal(cx, 0);
|
||||
let (a, set_a) = create_signal(0);
|
||||
let (b, set_b) = create_signal(0);
|
||||
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
// immediately prints "Value: 0" and subscribes to `a`
|
||||
log::debug!("Value: {}", a());
|
||||
});
|
||||
@@ -42,15 +42,15 @@ While they’re not a “zero-cost abstraction” in the most technical sense—
|
||||
Imagine that I’m creating some kind of chat software, and I want people to be able to display their full name, or just their first name, and to notify the server whenever their name changes:
|
||||
|
||||
```rust
|
||||
let (first, set_first) = create_signal(cx, String::new());
|
||||
let (last, set_last) = create_signal(cx, String::new());
|
||||
let (use_last, set_use_last) = create_signal(cx, true);
|
||||
let (first, set_first) = create_signal(String::new());
|
||||
let (last, set_last) = create_signal(String::new());
|
||||
let (use_last, set_use_last) = create_signal(true);
|
||||
|
||||
// this will add the name to the log
|
||||
// any time one of the source signals changes
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
log(
|
||||
cx,
|
||||
|
||||
if use_last() {
|
||||
format!("{} {}", first(), last())
|
||||
} else {
|
||||
@@ -77,9 +77,9 @@ If you need to synchronize some reactive value with the non-reactive world outsi
|
||||
We’ve managed to get this far without mentioning effects because they’re built into the Leptos DOM renderer. We’ve seen that you can create a signal and pass it into the `view` macro, and it will update the relevant DOM node whenever the signal changes:
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{count}</p>
|
||||
}
|
||||
```
|
||||
@@ -87,13 +87,13 @@ view! { cx,
|
||||
This works because the framework essentially creates an effect wrapping this update. You can imagine Leptos translating this view into something like this:
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// create a DOM element
|
||||
let p = create_element("p");
|
||||
|
||||
// create an effect to reactively update the text
|
||||
create_effect(cx, move |prev_value| {
|
||||
create_effect(move |prev_value| {
|
||||
// first, access the signal’s value and convert it to a string
|
||||
let text = count().to_string();
|
||||
|
||||
@@ -121,30 +121,30 @@ use leptos::html::Input;
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
fn App() -> impl IntoView {
|
||||
// Just making a visible log here
|
||||
// You can ignore this...
|
||||
let log = create_rw_signal::<Vec<String>>(cx, vec![]);
|
||||
let log = create_rw_signal::<Vec<String>>(vec![]);
|
||||
let logged = move || log().join("\n");
|
||||
provide_context(cx, log);
|
||||
provide_context(log);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<CreateAnEffect/>
|
||||
<pre>{logged}</pre>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn CreateAnEffect(cx: Scope) -> impl IntoView {
|
||||
let (first, set_first) = create_signal(cx, String::new());
|
||||
let (last, set_last) = create_signal(cx, String::new());
|
||||
let (use_last, set_use_last) = create_signal(cx, true);
|
||||
fn CreateAnEffect() -> impl IntoView {
|
||||
let (first, set_first) = create_signal(String::new());
|
||||
let (last, set_last) = create_signal(String::new());
|
||||
let (use_last, set_use_last) = create_signal(true);
|
||||
|
||||
// this will add the name to the log
|
||||
// any time one of the source signals changes
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
log(
|
||||
cx,
|
||||
|
||||
if use_last() {
|
||||
format!("{} {}", first(), last())
|
||||
} else {
|
||||
@@ -153,7 +153,7 @@ fn CreateAnEffect(cx: Scope) -> impl IntoView {
|
||||
)
|
||||
});
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1><code>"create_effect"</code> " Version"</h1>
|
||||
<form>
|
||||
<label>
|
||||
@@ -179,14 +179,14 @@ fn CreateAnEffect(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ManualVersion(cx: Scope) -> impl IntoView {
|
||||
let first = create_node_ref::<Input>(cx);
|
||||
let last = create_node_ref::<Input>(cx);
|
||||
let use_last = create_node_ref::<Input>(cx);
|
||||
fn ManualVersion() -> impl IntoView {
|
||||
let first = create_node_ref::<Input>();
|
||||
let last = create_node_ref::<Input>();
|
||||
let use_last = create_node_ref::<Input>();
|
||||
|
||||
let mut prev_name = String::new();
|
||||
let on_change = move |_| {
|
||||
log(cx, " listener");
|
||||
log(" listener");
|
||||
let first = first.get().unwrap();
|
||||
let last = last.get().unwrap();
|
||||
let use_last = use_last.get().unwrap();
|
||||
@@ -197,12 +197,12 @@ fn ManualVersion(cx: Scope) -> impl IntoView {
|
||||
};
|
||||
|
||||
if this_one != prev_name {
|
||||
log(cx, &this_one);
|
||||
log(&this_one);
|
||||
prev_name = this_one;
|
||||
}
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Manual Version"</h1>
|
||||
<form on:change=on_change>
|
||||
<label>
|
||||
@@ -229,12 +229,12 @@ fn ManualVersion(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn EffectVsDerivedSignal(cx: Scope) -> impl IntoView {
|
||||
let (my_value, set_my_value) = create_signal(cx, String::new());
|
||||
fn EffectVsDerivedSignal() -> impl IntoView {
|
||||
let (my_value, set_my_value) = create_signal(String::new());
|
||||
// Don't do this.
|
||||
/*let (my_optional_value, set_optional_my_value) = create_signal(cx, Option::<String>::None);
|
||||
/*let (my_optional_value, set_optional_my_value) = create_signal(Option::<String>::None);
|
||||
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
if !my_value.get().is_empty() {
|
||||
set_optional_my_value(Some(my_value.get()));
|
||||
} else {
|
||||
@@ -246,7 +246,7 @@ fn EffectVsDerivedSignal(cx: Scope) -> impl IntoView {
|
||||
let my_optional_value =
|
||||
move || (!my_value.with(String::is_empty)).then(|| Some(my_value.get()));
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<input
|
||||
prop:value=my_value
|
||||
on:input= move |ev| set_my_value(event_target_value(&ev))
|
||||
@@ -258,7 +258,7 @@ fn EffectVsDerivedSignal(cx: Scope) -> impl IntoView {
|
||||
<code>
|
||||
<Show
|
||||
when=move || my_optional_value().is_some()
|
||||
fallback=|cx| view! { cx, "None" }
|
||||
fallback=|| view! { "None" }
|
||||
>
|
||||
"Some(\"" {my_optional_value().unwrap()} "\")"
|
||||
</Show>
|
||||
@@ -270,9 +270,9 @@ fn EffectVsDerivedSignal(cx: Scope) -> impl IntoView {
|
||||
/*#[component]
|
||||
pub fn Show<F, W, IV>(
|
||||
/// The scope the component is running in
|
||||
cx: Scope,
|
||||
|
||||
/// The components Show wraps
|
||||
children: Box<dyn Fn(Scope) -> Fragment>,
|
||||
children: Box<dyn Fn() -> Fragment>,
|
||||
/// A closure that returns a bool that determines whether this thing runs
|
||||
when: W,
|
||||
/// A closure that returns what gets rendered if the when statement is false
|
||||
@@ -280,24 +280,24 @@ pub fn Show<F, W, IV>(
|
||||
) -> impl IntoView
|
||||
where
|
||||
W: Fn() -> bool + 'static,
|
||||
F: Fn(Scope) -> IV + 'static,
|
||||
F: Fn() -> IV + 'static,
|
||||
IV: IntoView,
|
||||
{
|
||||
let memoized_when = create_memo(cx, move |_| when());
|
||||
let memoized_when = create_memo(move |_| when());
|
||||
|
||||
move || match memoized_when.get() {
|
||||
true => children(cx).into_view(cx),
|
||||
false => fallback(cx).into_view(cx),
|
||||
true => children().into_view(),
|
||||
false => fallback().into_view(),
|
||||
}
|
||||
}*/
|
||||
|
||||
fn log(cx: Scope, msg: impl std::fmt::Display) {
|
||||
let log = use_context::<RwSignal<Vec<String>>>(cx).unwrap();
|
||||
fn log(std::fmt::Display) {
|
||||
let log = use_context::<RwSignal<Vec<String>>>().unwrap();
|
||||
log.update(|log| log.push(msg.to_string()));
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -6,7 +6,7 @@ application. It sometimes looks a little silly:
|
||||
|
||||
```rust
|
||||
// a signal holds a value, and can be updated
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// a derived signal is a function that accesses other signals
|
||||
let double_count = move || count() * 2;
|
||||
@@ -19,11 +19,11 @@ let text = move || if count_is_odd() {
|
||||
|
||||
// an effect automatically tracks the signals it depends on
|
||||
// and reruns when they change
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
log!("text = {}", text());
|
||||
});
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{move || text().to_uppercase()}</p>
|
||||
}
|
||||
```
|
||||
@@ -53,12 +53,12 @@ Take our typical `<SimpleCounter/>` example in its simplest form:
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn SimpleCounter(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
pub fn SimpleCounter() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
let increment = move |_| set_value.update(|value| *value += 1);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button on:click=increment>
|
||||
{value}
|
||||
</button>
|
||||
|
||||
@@ -14,7 +14,7 @@ There are four basic signal operations:
|
||||
Calling a `ReadSignal` as a function is syntax sugar for `.get()`. Calling a `WriteSignal` as a function is syntax sugar for `.set()`. So
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
set_count(1);
|
||||
log!(count());
|
||||
```
|
||||
@@ -22,7 +22,7 @@ log!(count());
|
||||
is the same as
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
set_count.set(1);
|
||||
log!(count.get());
|
||||
```
|
||||
@@ -36,7 +36,7 @@ However, there are some very good use cases for `.with()` and `.update()`.
|
||||
For example, consider a signal that holds a `Vec<String>`.
|
||||
|
||||
```rust
|
||||
let (names, set_names) = create_signal(cx, Vec::new());
|
||||
let (names, set_names) = create_signal(Vec::new());
|
||||
if names().is_empty() {
|
||||
set_names(vec!["Alice".to_string()]);
|
||||
}
|
||||
@@ -47,7 +47,7 @@ In terms of logic, this is simple enough, but it’s hiding some significant ine
|
||||
Likewise, `set_names` replaces the value with a whole new `Vec<_>`. This is fine, but we might as well just mutate the original `Vec<_>` in place.
|
||||
|
||||
```rust
|
||||
let (names, set_names) = create_signal(cx, Vec::new());
|
||||
let (names, set_names) = create_signal(Vec::new());
|
||||
if names.with(|names| names.is_empty()) {
|
||||
set_names.update(|names| names.push("Alice".to_string()));
|
||||
}
|
||||
@@ -70,33 +70,39 @@ After all, `.with()` simply takes a function that takes the value by reference.
|
||||
Often people ask about situations in which some signal needs to change based on some other signal’s value. There are three good ways to do this, and one that’s less than ideal but okay under controlled circumstances.
|
||||
|
||||
### Good Options
|
||||
|
||||
**1) B is a function of A.** Create a signal for A and a derived signal or memo for B.
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 1);
|
||||
let (count, set_count) = create_signal(1);
|
||||
let derived_signal_double_count = move || count() * 2;
|
||||
let memoized_double_count = create_memo(cx, move |_| count() * 2);
|
||||
let memoized_double_count = create_memo(move |_| count() * 2);
|
||||
```
|
||||
|
||||
> For guidance on whether to use a derived signal or a memo, see the docs for [`create_memo`](https://docs.rs/leptos/latest/leptos/fn.create_memo.html)
|
||||
>
|
||||
**2) C is a function of A and some other thing B.** Create signals for A and B and a derived signal or memo for C.
|
||||
>
|
||||
> **2) C is a function of A and some other thing B.** Create signals for A and B and a derived signal or memo for C.
|
||||
|
||||
```rust
|
||||
let (first_name, set_first_name) = create_signal(cx, "Bridget".to_string());
|
||||
let (last_name, set_last_name) = create_signal(cx, "Jones".to_string());
|
||||
let (first_name, set_first_name) = create_signal("Bridget".to_string());
|
||||
let (last_name, set_last_name) = create_signal("Jones".to_string());
|
||||
let full_name = move || format!("{} {}", first_name(), last_name());
|
||||
```
|
||||
|
||||
**3) A and B are independent signals, but sometimes updated at the same time.** When you make the call to update A, make a separate call to update B.
|
||||
|
||||
```rust
|
||||
let (age, set_age) = create_signal(cx, 32);
|
||||
let (favorite_number, set_favorite_number) = create_signal(cx, 42);
|
||||
let (age, set_age) = create_signal(32);
|
||||
let (favorite_number, set_favorite_number) = create_signal(42);
|
||||
// use this to handle a click on a `Clear` button
|
||||
let clear_handler = move |_| {
|
||||
set_age(0);
|
||||
set_favorite_number(0);
|
||||
};
|
||||
```
|
||||
|
||||
### If you really must...
|
||||
|
||||
**4) Create an effect to write to B whenever A changes.** This is officially discouraged, for several reasons:
|
||||
a) It will always be less efficient, as it means every time A updates you do two full trips through the reactive process. (You set A, which causes the effect to run, as well as any other effects that depend on A. Then you set B, which causes any effects that depend on B to run.)
|
||||
b) It increases your chances of accidentally creating things like infinite loops or over-re-running effects. This is the kind of ping-ponging, reactive spaghetti code that was common in the early 2010s and that we try to avoid with things like read-write segregation and discouraging writing to signals from effects.
|
||||
|
||||
@@ -33,8 +33,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<nav>
|
||||
/* ... */
|
||||
@@ -58,8 +58,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<nav>
|
||||
/* ... */
|
||||
@@ -83,14 +83,14 @@ The `path` can include
|
||||
- dynamic, named parameters beginning with a colon (`/:id`),
|
||||
- and/or a wildcard beginning with an asterisk (`/user/*any`)
|
||||
|
||||
The `view` is a function that takes a `Scope` and returns a view.
|
||||
The `view` is a function that returns a view. Any component with no props works here, as does a closure that returns some view.
|
||||
|
||||
```rust
|
||||
<Routes>
|
||||
<Route path="/" view=Home/>
|
||||
<Route path="/users" view=Users/>
|
||||
<Route path="/users/:id" view=UserProfile/>
|
||||
<Route path="/*any" view=NotFound/>
|
||||
<Route path="/*any" view=|| view! { <h1>"Not Found"</h1> }/>
|
||||
</Routes>
|
||||
```
|
||||
|
||||
|
||||
@@ -113,7 +113,7 @@ You can go even deeper. Say you want to have tabs for each contact’s address,
|
||||
<Route path="address" view=Address/>
|
||||
<Route path="messages" view=Messages/>
|
||||
</Route>
|
||||
<Route path="" view=|cx| view! { cx,
|
||||
<Route path="" view=|| view! {
|
||||
<p>"Select a contact to view more info."</p>
|
||||
}/>
|
||||
</Route>
|
||||
@@ -135,15 +135,15 @@ That’s all! But it’s important to know and to remember, because it’s a com
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn ContactList(cx: Scope) -> impl IntoView {
|
||||
pub fn ContactList() -> impl IntoView {
|
||||
let contacts = todo!();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div style="display: flex">
|
||||
// the contact list
|
||||
<For each=contacts
|
||||
key=|contact| contact.id
|
||||
view=|cx, contact| todo!()
|
||||
view=|contact| todo!()
|
||||
>
|
||||
// the nested child, if any
|
||||
// don’t forget this!
|
||||
@@ -179,8 +179,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<h1>"Contact App"</h1>
|
||||
// this <nav> will show on every routes,
|
||||
@@ -195,13 +195,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<main>
|
||||
<Routes>
|
||||
// / just has an un-nested "Home"
|
||||
<Route path="/" view=|cx| view! { cx,
|
||||
<Route path="/" view=|| view! {
|
||||
<h3>"Home"</h3>
|
||||
}/>
|
||||
// /contacts has nested routes
|
||||
<Route
|
||||
path="/contacts"
|
||||
view=ContactList
|
||||
>
|
||||
// if no id specified, fall back
|
||||
<Route path=":id" view=ContactInfo>
|
||||
<Route path="" view=|cx| view! { cx,
|
||||
@@ -209,14 +210,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
"(Contact Info)"
|
||||
</div>
|
||||
}/>
|
||||
<Route path="conversations" view=|cx| view! { cx,
|
||||
<Route path="conversations" view=|| view! {
|
||||
<div class="tab">
|
||||
"(Conversations)"
|
||||
</div>
|
||||
}/>
|
||||
</Route>
|
||||
// if no id specified, fall back
|
||||
<Route path="" view=|cx| view! { cx,
|
||||
<Route path="" view=|| view! {
|
||||
<div class="select-user">
|
||||
"Select a user to view contact info."
|
||||
</div>
|
||||
@@ -229,8 +230,8 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactList(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn ContactList() -> impl IntoView {
|
||||
view! {
|
||||
<div class="contact-list">
|
||||
// here's our contact list component itself
|
||||
<div class="contact-list-contacts">
|
||||
@@ -249,9 +250,9 @@ fn ContactList(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
fn ContactInfo() -> impl IntoView {
|
||||
// we can access the :id param reactively with `use_params_map`
|
||||
let params = use_params_map(cx);
|
||||
let params = use_params_map();
|
||||
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
|
||||
|
||||
// imagine we're loading data from an API here
|
||||
@@ -262,7 +263,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
_ => "User not found.",
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="contact-info">
|
||||
<h4>{name}</h4>
|
||||
<div class="tabs">
|
||||
@@ -278,7 +279,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -50,8 +50,8 @@ Now we can use them in a component. Imagine a URL that has both params and a que
|
||||
The typed versions return `Memo<Result<T, _>>`. It’s a Memo so it reacts to changes in the URL. It’s a `Result` because the params or query need to be parsed from the URL, and may or may not be valid.
|
||||
|
||||
```rust
|
||||
let params = use_params::<ContactParams>(cx);
|
||||
let query = use_query::<ContactSearch>(cx);
|
||||
let params = use_params::<ContactParams>();
|
||||
let query = use_query::<ContactSearch>();
|
||||
|
||||
// id: || -> usize
|
||||
let id = move || {
|
||||
@@ -66,8 +66,8 @@ let id = move || {
|
||||
The untyped versions return `Memo<ParamsMap>`. Again, it’s memo to react to changes in the URL. [`ParamsMap`](https://docs.rs/leptos_router/0.2.3/leptos_router/struct.ParamsMap.html) behaves a lot like any other map type, with a `.get()` method that returns `Option<&String>`.
|
||||
|
||||
```rust
|
||||
let params = use_params_map(cx);
|
||||
let query = use_query_map(cx);
|
||||
let params = use_params_map();
|
||||
let query = use_query_map();
|
||||
|
||||
// id: || -> Option<String>
|
||||
let id = move || {
|
||||
@@ -94,8 +94,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<h1>"Contact App"</h1>
|
||||
// this <nav> will show on every routes,
|
||||
@@ -110,7 +110,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<main>
|
||||
<Routes>
|
||||
// / just has an un-nested "Home"
|
||||
<Route path="/" view=|cx| view! { cx,
|
||||
<Route path="/" view=|| view! {
|
||||
<h3>"Home"</h3>
|
||||
}/>
|
||||
// /contacts has nested routes
|
||||
@@ -125,14 +125,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
"(Contact Info)"
|
||||
</div>
|
||||
}/>
|
||||
<Route path="conversations" view=|cx| view! { cx,
|
||||
<Route path="conversations" view=|| view! {
|
||||
<div class="tab">
|
||||
"(Conversations)"
|
||||
</div>
|
||||
}/>
|
||||
</Route>
|
||||
// if no id specified, fall back
|
||||
<Route path="" view=|cx| view! { cx,
|
||||
<Route path="" view=|| view! {
|
||||
<div class="select-user">
|
||||
"Select a user to view contact info."
|
||||
</div>
|
||||
@@ -145,8 +145,8 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactList(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn ContactList() -> impl IntoView {
|
||||
view! {
|
||||
<div class="contact-list">
|
||||
// here's our contact list component itself
|
||||
<div class="contact-list-contacts">
|
||||
@@ -165,9 +165,9 @@ fn ContactList(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
fn ContactInfo() -> impl IntoView {
|
||||
// we can access the :id param reactively with `use_params_map`
|
||||
let params = use_params_map(cx);
|
||||
let params = use_params_map();
|
||||
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
|
||||
|
||||
// imagine we're loading data from an API here
|
||||
@@ -178,7 +178,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
_ => "User not found.",
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="contact-info">
|
||||
<h4>{name}</h4>
|
||||
<div class="tabs">
|
||||
@@ -194,7 +194,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -32,8 +32,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<h1>"Contact App"</h1>
|
||||
// this <nav> will show on every routes,
|
||||
@@ -48,7 +48,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<main>
|
||||
<Routes>
|
||||
// / just has an un-nested "Home"
|
||||
<Route path="/" view=|cx| view! { cx,
|
||||
<Route path="/" view=|| view! {
|
||||
<h3>"Home"</h3>
|
||||
}/>
|
||||
// /contacts has nested routes
|
||||
@@ -63,14 +63,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
"(Contact Info)"
|
||||
</div>
|
||||
}/>
|
||||
<Route path="conversations" view=|cx| view! { cx,
|
||||
<Route path="conversations" view=|| view! {
|
||||
<div class="tab">
|
||||
"(Conversations)"
|
||||
</div>
|
||||
}/>
|
||||
</Route>
|
||||
// if no id specified, fall back
|
||||
<Route path="" view=|cx| view! { cx,
|
||||
<Route path="" view=|| view! {
|
||||
<div class="select-user">
|
||||
"Select a user to view contact info."
|
||||
</div>
|
||||
@@ -83,8 +83,8 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactList(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn ContactList() -> impl IntoView {
|
||||
view! {
|
||||
<div class="contact-list">
|
||||
// here's our contact list component itself
|
||||
<div class="contact-list-contacts">
|
||||
@@ -103,9 +103,9 @@ fn ContactList(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
fn ContactInfo() -> impl IntoView {
|
||||
// we can access the :id param reactively with `use_params_map`
|
||||
let params = use_params_map(cx);
|
||||
let params = use_params_map();
|
||||
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
|
||||
|
||||
// imagine we're loading data from an API here
|
||||
@@ -116,7 +116,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
_ => "User not found.",
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="contact-info">
|
||||
<h4>{name}</h4>
|
||||
<div class="tabs">
|
||||
@@ -132,7 +132,7 @@ fn ContactInfo(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -24,15 +24,15 @@ async fn fetch_results() {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn FormExample(cx: Scope) -> impl IntoView {
|
||||
pub fn FormExample() -> impl IntoView {
|
||||
// reactive access to URL query strings
|
||||
let query = use_query_map(cx);
|
||||
let query = use_query_map();
|
||||
// search stored as ?q=
|
||||
let search = move || query().get("q").cloned().unwrap_or_default();
|
||||
// a resource driven by the search string
|
||||
let search_results = create_resource(cx, search, fetch_results);
|
||||
let search_results = create_resource(search, fetch_results);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<Form method="GET" action="">
|
||||
<input type="search" name="search" value=search/>
|
||||
<input type="submit"/>
|
||||
@@ -51,7 +51,7 @@ This is a great pattern. The data flow is extremely clear: all data flows from t
|
||||
We can actually take it a step further and do something kind of clever:
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<Form method="GET" action="">
|
||||
<input type="search" name="search" value=search
|
||||
oninput="this.form.requestSubmit()"
|
||||
@@ -74,8 +74,8 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<Router>
|
||||
<h1><code>"<Form/>"</code></h1>
|
||||
<main>
|
||||
@@ -88,14 +88,14 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn FormExample(cx: Scope) -> impl IntoView {
|
||||
pub fn FormExample() -> impl IntoView {
|
||||
// reactive access to URL query
|
||||
let query = use_query_map(cx);
|
||||
let query = use_query_map();
|
||||
let name = move || query().get("name").cloned().unwrap_or_default();
|
||||
let number = move || query().get("number").cloned().unwrap_or_default();
|
||||
let select = move || query().get("select").cloned().unwrap_or_default();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
// read out the URL query strings
|
||||
<table>
|
||||
<tr>
|
||||
@@ -172,7 +172,7 @@ pub fn FormExample(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -31,9 +31,9 @@ pub async fn add_todo(title: String) -> Result<(), ServerFnError> {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn BusyButton(cx: Scope) -> impl IntoView {
|
||||
pub fn BusyButton() -> impl IntoView {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<button on:click=move |_| {
|
||||
spawn_local(async {
|
||||
add_todo("So much to do!".to_string()).await;
|
||||
@@ -100,9 +100,9 @@ In other words, you have two choices:
|
||||
> **Why not `PUT` or `DELETE`? Why URL/form encoding, and not JSON?**
|
||||
>
|
||||
> These are reasonable questions. Much of the web is built on REST API patterns that encourage the use of semantic HTTP methods like `DELETE` to delete an item from a database, and many devs are accustomed to sending data to APIs in the JSON format.
|
||||
>
|
||||
>
|
||||
> The reason we use `POST` or `GET` with URL-encoded data by default is the `<form>` support. For better or for worse, HTML forms don’t support `PUT` or `DELETE`, and they don’t support sending JSON. This means that if you use anything but a `GET` or `POST` request with URL-encoded data, it can only work once WASM has loaded. As we’ll see [in a later chapter](../progressive_enhancement), this isn’t always a great idea.
|
||||
>
|
||||
>
|
||||
> The CBOR encoding is suported for historical reasons; an earlier version of server functions used a URL encoding that didn’t support nested objects like structs or vectors as server function arguments, which CBOR did. But note that the CBOR forms encounter the same issue as `PUT`, `DELETE`, or JSON: they do not degrade gracefully if the WASM version of your app is not available.
|
||||
|
||||
## An Important Note on Security
|
||||
|
||||
@@ -23,12 +23,12 @@ The [`extract` function in `leptos_actix`](https://docs.rs/leptos_actix/latest/l
|
||||
```rust
|
||||
|
||||
#[server(ActixExtract, "/api")]
|
||||
pub async fn actix_extract(cx: Scope) -> Result<String, ServerFnError> {
|
||||
pub async fn actix_extract() -> Result<String, ServerFnError> {
|
||||
use leptos_actix::extract;
|
||||
use actix_web::dev::ConnectionInfo;
|
||||
use actix_web::web::{Data, Query};
|
||||
|
||||
extract(cx,
|
||||
extract(
|
||||
|search: Query<Search>, connection: ConnectionInfo| async move {
|
||||
format!(
|
||||
"search = {}\nconnection = {:?}",
|
||||
@@ -47,11 +47,11 @@ The syntax for the [`leptos_axum::extract`](https://docs.rs/leptos_axum/latest/l
|
||||
|
||||
```rust
|
||||
#[server(AxumExtract, "/api")]
|
||||
pub async fn axum_extract(cx: Scope) -> Result<String, ServerFnError> {
|
||||
pub async fn axum_extract() -> Result<String, ServerFnError> {
|
||||
use axum::{extract::Query, http::Method};
|
||||
use leptos_axum::extract;
|
||||
|
||||
extract(cx, |method: Method, res: Query<MyQuery>| async move {
|
||||
extract(|method: Method, res: Query<MyQuery>| async move {
|
||||
format!("{method:?} and {}", res.q)
|
||||
},
|
||||
)
|
||||
|
||||
@@ -8,12 +8,12 @@ Extractors provide an easy way to access request data inside server functions. L
|
||||
|
||||
```rust
|
||||
#[server(TeaAndCookies)]
|
||||
pub async fn tea_and_cookies(cx: Scope) -> Result<(), ServerFnError> {
|
||||
pub async fn tea_and_cookies() -> Result<(), ServerFnError> {
|
||||
use actix_web::{cookie::Cookie, http::header, http::header::HeaderValue};
|
||||
use leptos_actix::ResponseOptions;
|
||||
|
||||
// pull ResponseOptions from context
|
||||
let response = expect_context::<ResponseOptions>(cx);
|
||||
let response = expect_context::<ResponseOptions>();
|
||||
|
||||
// set the HTTP status code
|
||||
response.set_status(StatusCode::IM_A_TEAPOT);
|
||||
@@ -35,14 +35,14 @@ Here’s a simplified example from our [`session_auth_axum` example](https://git
|
||||
```rust
|
||||
#[server(Login, "/api")]
|
||||
pub async fn login(
|
||||
cx: Scope,
|
||||
|
||||
username: String,
|
||||
password: String,
|
||||
remember: Option<String>,
|
||||
) -> Result<(), ServerFnError> {
|
||||
// pull the DB pool and auth provider from context
|
||||
let pool = pool(cx)?;
|
||||
let auth = auth(cx)?;
|
||||
let pool = pool()?;
|
||||
let auth = auth()?;
|
||||
|
||||
// check whether the user exists
|
||||
let user: User = User::get_from_username(username, &pool)
|
||||
@@ -60,7 +60,7 @@ pub async fn login(
|
||||
auth.remember_user(remember.is_some());
|
||||
|
||||
// and redirect to the home page
|
||||
leptos_axum::redirect(cx, "/");
|
||||
leptos_axum::redirect("/");
|
||||
Ok(())
|
||||
}
|
||||
// if not, return an error
|
||||
|
||||
@@ -110,14 +110,14 @@ With blocking resources, I can do something like this:
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn BlogPost(cx: Scope) -> impl IntoView {
|
||||
let post_data = create_blocking_resource(cx, /* load blog post */);
|
||||
let comment_data = create_resource(cx, /* load blog post */);
|
||||
view! { cx,
|
||||
pub fn BlogPost() -> impl IntoView {
|
||||
let post_data = create_blocking_resource(/* load blog post */);
|
||||
let comment_data = create_resource(/* load blog post */);
|
||||
view! {
|
||||
<Suspense fallback=|| ()>
|
||||
{move || {
|
||||
post_data.with(cx, |data| {
|
||||
view! { cx,
|
||||
post_data.with(|data| {
|
||||
view! {
|
||||
<Title text=data.title/>
|
||||
<Meta name="description" content=data.excerpt/>
|
||||
<article>
|
||||
|
||||
@@ -8,7 +8,7 @@ Put a log somewhere in your root component. (I usually call mine `<App/>`, but a
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
leptos::log!("where do I run?");
|
||||
// ... whatever
|
||||
}
|
||||
@@ -57,15 +57,15 @@ One way to create a bug is by creating a mismatch between the HTML that’s sent
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
let data = if cfg!(target_arch = "wasm32") {
|
||||
vec![0, 1, 2]
|
||||
} else {
|
||||
vec![]
|
||||
};
|
||||
data.into_iter()
|
||||
.map(|value| view! { cx, <span>{value}</span> })
|
||||
.collect_view(cx)
|
||||
.map(|value| view! { <span>{value}</span> })
|
||||
.collect_view()
|
||||
}
|
||||
```
|
||||
|
||||
@@ -93,20 +93,20 @@ This is a slightly more common way to create a client/server mismatch: updating
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (loaded, set_loaded) = create_signal(cx, false);
|
||||
pub fn App() -> impl IntoView {
|
||||
let (loaded, set_loaded) = create_signal(false);
|
||||
|
||||
// create_effect only runs on the client
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
// do something like reading from localStorage
|
||||
set_loaded(true);
|
||||
});
|
||||
|
||||
move || {
|
||||
if loaded() {
|
||||
view! { cx, <p>"Hello, world!"</p> }.into_any()
|
||||
view! { <p>"Hello, world!"</p> }.into_any()
|
||||
} else {
|
||||
view! { cx, <div class="loading">"Loading..."</div> }.into_any()
|
||||
view! { <div class="loading">"Loading..."</div> }.into_any()
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -129,7 +129,7 @@ The problem here is that `create_effect` runs **immediately** and **synchronousl
|
||||
You can simply tell the effect to wait a tick before updating the signal, by using something like `request_animation_frame`, which will set a short timeout and then update the signal before the next frame.
|
||||
|
||||
```rust
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
// do something like reading from localStorage
|
||||
request_animation_frame(move || set_loaded(true));
|
||||
});
|
||||
@@ -163,7 +163,7 @@ For example, say that I want to store something in the browser’s `localStorage
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
use gloo_storage::Storage;
|
||||
let storage = gloo_storage::LocalStorage::raw();
|
||||
leptos::log!("{storage:?}");
|
||||
@@ -176,9 +176,9 @@ But if I wrap it in an effect...
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
use gloo_storage::Storage;
|
||||
create_effect(cx, move |_| {
|
||||
create_effect(move |_| {
|
||||
let storage = gloo_storage::LocalStorage::raw();
|
||||
leptos::log!("{storage:?}");
|
||||
});
|
||||
|
||||
@@ -14,8 +14,8 @@ For example, instead of embedding logic in a component directly like this:
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn TodoApp(cx: Scope) -> impl IntoView {
|
||||
let (todos, set_todos) = create_signal(cx, vec![Todo { /* ... */ }]);
|
||||
pub fn TodoApp() -> impl IntoView {
|
||||
let (todos, set_todos) = create_signal(vec![Todo { /* ... */ }]);
|
||||
// ⚠️ this is hard to test because it's embedded in the component
|
||||
let num_remaining = move || todos.with(|todos| {
|
||||
todos.iter().filter(|todo| !todo.completed).sum()
|
||||
@@ -43,8 +43,8 @@ mod tests {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn TodoApp(cx: Scope) -> impl IntoView {
|
||||
let (todos, set_todos) = create_signal(cx, Todos(vec![Todo { /* ... */ }]));
|
||||
pub fn TodoApp() -> impl IntoView {
|
||||
let (todos, set_todos) = create_signal(Todos(vec![Todo { /* ... */ }]));
|
||||
// ✅ this has a test associated with it
|
||||
let num_remaining = move || todos.with(Todos::num_remaining);
|
||||
}
|
||||
@@ -105,7 +105,7 @@ fn clear() {
|
||||
// note that we start at the initial value of 10
|
||||
mount_to(
|
||||
test_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <SimpleCounter initial_value=10 step=1/> },
|
||||
|| view! { <SimpleCounter initial_value=10 step=1/> },
|
||||
);
|
||||
}
|
||||
```
|
||||
@@ -139,12 +139,12 @@ I like to test the whole view at once. We can do this by testing the element’s
|
||||
assert_eq!(
|
||||
div.outer_html(),
|
||||
// here we spawn a mini reactive system to render the test case
|
||||
run_scope(create_runtime(), |cx| {
|
||||
run_scope(create_runtime(), || {
|
||||
// it's as if we're creating it with a value of 0, right?
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
// we can remove the event listeners because they're not rendered to HTML
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button>"Clear"</button>
|
||||
<button>"-1"</button>
|
||||
@@ -169,7 +169,7 @@ assert_eq!(test_wrapper.inner_html(), {
|
||||
let comparison_wrapper = document.create_element("section").unwrap();
|
||||
leptos::mount_to(
|
||||
comparison_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <SimpleCounter initial_value=0 step=1/>},
|
||||
|| view! { <SimpleCounter initial_value=0 step=1/>},
|
||||
);
|
||||
comparison_wrapper.inner_html()
|
||||
});
|
||||
|
||||
@@ -13,7 +13,7 @@ DOM, with self-contained, defined behavior. Unlike HTML elements, they are in
|
||||
|
||||
```rust
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
```
|
||||
|
||||
@@ -22,10 +22,10 @@ I’ll give you the whole thing up front, then walk through it line by line.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| {
|
||||
set_count(3);
|
||||
@@ -49,18 +49,17 @@ used as a component in your Leptos application. We’ll see some of the other fe
|
||||
this macro in a couple chapters.
|
||||
|
||||
```rust
|
||||
fn App(cx: Scope) -> impl IntoView
|
||||
fn App() -> impl IntoView
|
||||
```
|
||||
|
||||
Every component is a function with the following characteristics
|
||||
|
||||
1. It takes a reactive [`Scope`](https://docs.rs/leptos/latest/leptos/struct.Scope.html)
|
||||
as its first argument. This `Scope` is our entrypoint into the reactive system.
|
||||
By convention, it’s usually named `cx`.
|
||||
2. You can include other arguments, which will be available as component “props.”
|
||||
3. Component functions return `impl IntoView`, which is an opaque type that includes
|
||||
1. It takes zero or more arguments of any type.
|
||||
2. It returns `impl IntoView`, which is an opaque type that includes
|
||||
anything you could return from a Leptos `view`.
|
||||
|
||||
> Component function arguments are gathered together into a single props struct which is built by the `view` macro as needed.
|
||||
|
||||
## The Component Body
|
||||
|
||||
The body of the component function is a set-up function that runs once, not a
|
||||
@@ -69,7 +68,7 @@ few reactive variables, define any side effects that run in response to those va
|
||||
changing, and describe the user interface.
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
```
|
||||
|
||||
[`create_signal`](https://docs.rs/leptos/latest/leptos/fn.create_signal.html)
|
||||
@@ -85,7 +84,7 @@ current value, you’ll call `set_count.set(...)` (or `set_count(...)`).
|
||||
Leptos defines user interfaces using a JSX-like format via the [`view`](https://docs.rs/leptos/latest/leptos/macro.view.html) macro.
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
// define an event listener with on:
|
||||
on:click=move |_| {
|
||||
@@ -127,7 +126,7 @@ Leptos with `nightly` Rust, signals are already functions, so the closure is unn
|
||||
As a result, you can write a simpler view:
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<button /* ... */>
|
||||
"Click me: "
|
||||
// identical to {move || count.get()}
|
||||
@@ -171,16 +170,16 @@ use leptos::*;
|
||||
// Components are the building blocks of your user interface
|
||||
// They define a reusable unit of behavior
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
fn App() -> impl IntoView {
|
||||
// here we create a reactive signal
|
||||
// and get a (getter, setter) pair
|
||||
// signals are the basic unit of change in the framework
|
||||
// we'll talk more about them later
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// the `view` macro is how we define the user interface
|
||||
// it uses an HTML-like format that can accept certain Rust values
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
// on:click will run whenever the `click` event fires
|
||||
// every event handler is defined as `on:{eventname}`
|
||||
@@ -221,6 +220,6 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
// Because we defined it as `fn App`, we can now use it in a
|
||||
// template as <App/>
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
```
|
||||
|
||||
@@ -12,10 +12,10 @@ increment a counter.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| {
|
||||
set_count.update(|n| *n += 1);
|
||||
@@ -73,9 +73,9 @@ class=("button-20", move || count() % 2 == 1)
|
||||
Individual CSS properties can be directly updated with a similar `style:` syntax.
|
||||
|
||||
```rust
|
||||
let (x, set_x) = create_signal(cx, 0);
|
||||
let (y, set_y) = create_signal(cx, 0);
|
||||
view! { cx,
|
||||
let (x, set_x) = create_signal(0);
|
||||
let (y, set_y) = create_signal(0);
|
||||
view! {
|
||||
<div
|
||||
style="position: absolute"
|
||||
style:left=move || format!("{}px", x() + 100)
|
||||
@@ -160,15 +160,15 @@ places in your application with minimal overhead.
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
// a "derived signal" is a function that accesses other signals
|
||||
// we can use this to create reactive values that depend on the
|
||||
// values of one or more other signals
|
||||
let double_count = move || count() * 2;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| {
|
||||
set_count.update(|n| *n += 1);
|
||||
@@ -210,7 +210,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
@@ -12,10 +12,10 @@ per click.
|
||||
You _could_ do this by just creating two `<progress>` elements:
|
||||
|
||||
```rust
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
let (count, set_count) = create_signal(0);
|
||||
let double_count = move || count() * 2;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max="50"
|
||||
value=count
|
||||
@@ -36,9 +36,9 @@ Instead, let’s create a `<ProgressBar/>` component.
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope
|
||||
|
||||
) -> impl IntoView {
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max="50"
|
||||
// hmm... where will we get this from?
|
||||
@@ -64,10 +64,10 @@ In Leptos, you define props by giving additional arguments to the component func
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope,
|
||||
|
||||
progress: ReadSignal<i32>
|
||||
) -> impl IntoView {
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max="50"
|
||||
// now this works
|
||||
@@ -81,9 +81,9 @@ Now we can use our component in the main `<App/>` component’s view.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
view! {
|
||||
<button on:click=move |_| { set_count.update(|n| *n += 1); }>
|
||||
"Click me"
|
||||
</button>
|
||||
@@ -118,14 +118,14 @@ argument to the component function with `#[prop(optional)]`.
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope,
|
||||
|
||||
// mark this prop optional
|
||||
// you can specify it or not when you use <ProgressBar/>
|
||||
#[prop(optional)]
|
||||
max: u16,
|
||||
progress: ReadSignal<i32>
|
||||
) -> impl IntoView {
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max=max
|
||||
value=progress
|
||||
@@ -149,12 +149,12 @@ with `#[prop(default = ...)`.
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope,
|
||||
|
||||
#[prop(default = 100)]
|
||||
max: u16,
|
||||
progress: ReadSignal<i32>
|
||||
) -> impl IntoView {
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max=max
|
||||
value=progress
|
||||
@@ -171,11 +171,11 @@ as the `progress` prop on another `<ProgressBar/>`.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
let double_count = move || count() * 2;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button on:click=move |_| { set_count.update(|n| *n += 1); }>
|
||||
"Click me"
|
||||
</button>
|
||||
@@ -199,7 +199,7 @@ implement the trait `Fn() -> i32`. So you could use a generic component:
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar<F>(
|
||||
cx: Scope,
|
||||
|
||||
#[prop(default = 100)]
|
||||
max: u16,
|
||||
progress: F
|
||||
@@ -207,7 +207,7 @@ fn ProgressBar<F>(
|
||||
where
|
||||
F: Fn() -> i32 + 'static,
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max=max
|
||||
value=progress
|
||||
@@ -255,14 +255,14 @@ reactive value.
|
||||
```rust
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope,
|
||||
|
||||
#[prop(default = 100)]
|
||||
max: u16,
|
||||
#[prop(into)]
|
||||
progress: Signal<i32>
|
||||
) -> impl IntoView
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max=max
|
||||
value=progress
|
||||
@@ -271,18 +271,18 @@ fn ProgressBar(
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
let double_count = move || count() * 2;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button on:click=move |_| { set_count.update(|n| *n += 1); }>
|
||||
"Click me"
|
||||
</button>
|
||||
// .into() converts `ReadSignal` to `Signal`
|
||||
<ProgressBar progress=count/>
|
||||
// use `Signal::derive()` to wrap a derived signal
|
||||
<ProgressBar progress=Signal::derive(cx, double_count)/>
|
||||
<ProgressBar progress=Signal::derive(double_count)/>
|
||||
}
|
||||
}
|
||||
```
|
||||
@@ -376,7 +376,7 @@ component function, and each one of the props:
|
||||
/// Shows progress toward a goal.
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
cx: Scope,
|
||||
|
||||
/// The maximum value of the progress bar.
|
||||
#[prop(default = 100)]
|
||||
max: u16,
|
||||
@@ -415,8 +415,6 @@ use leptos::*;
|
||||
/// Shows progress toward a goal.
|
||||
#[component]
|
||||
fn ProgressBar(
|
||||
// All components take a reactive `Scope` as the first argument
|
||||
cx: Scope,
|
||||
// Marks this as an optional prop. It will default to the default
|
||||
// value of its type, i.e., 0.
|
||||
#[prop(default = 100)]
|
||||
@@ -430,7 +428,7 @@ fn ProgressBar(
|
||||
/// How much progress should be displayed.
|
||||
progress: Signal<i32>,
|
||||
) -> impl IntoView {
|
||||
view! { cx,
|
||||
view! {
|
||||
<progress
|
||||
max={max}
|
||||
value=progress
|
||||
@@ -440,12 +438,12 @@ fn ProgressBar(
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (count, set_count) = create_signal(0);
|
||||
|
||||
let double_count = move || count() * 2;
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| {
|
||||
set_count.update(|n| *n += 1);
|
||||
@@ -463,12 +461,12 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<ProgressBar progress=count/>
|
||||
// Signal::derive creates a Signal wrapper from our derived signal
|
||||
// using double_count means it should move twice as fast
|
||||
<ProgressBar max=50 progress=Signal::derive(cx, double_count)/>
|
||||
<ProgressBar max=50 progress=Signal::derive(double_count)/>
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
@@ -19,30 +19,30 @@ any `Vec<IV> where IV: IntoView` into your view. In other words, if you can rend
|
||||
|
||||
```rust
|
||||
let values = vec![0, 1, 2];
|
||||
view! { cx,
|
||||
view! {
|
||||
// this will just render "012"
|
||||
<p>{values.clone()}</p>
|
||||
// or we can wrap them in <li>
|
||||
<ul>
|
||||
{values.into_iter()
|
||||
.map(|n| view! { cx, <li>{n}</li>})
|
||||
.map(|n| view! { <li>{n}</li>})
|
||||
.collect::<Vec<_>>()}
|
||||
</ul>
|
||||
}
|
||||
```
|
||||
|
||||
Leptos also provides a `.collect_view(cx)` helper function that allows you to collect any iterator of `T: IntoView` into `Vec<View>`.
|
||||
Leptos also provides a `.collect_view()` helper function that allows you to collect any iterator of `T: IntoView` into `Vec<View>`.
|
||||
|
||||
```rust
|
||||
let values = vec![0, 1, 2];
|
||||
view! { cx,
|
||||
view! {
|
||||
// this will just render "012"
|
||||
<p>{values.clone()}</p>
|
||||
// or we can wrap them in <li>
|
||||
<ul>
|
||||
{values.into_iter()
|
||||
.map(|n| view! { cx, <li>{n}</li>})
|
||||
.collect_view(cx)}
|
||||
.map(|n| view! { <li>{n}</li>})
|
||||
.collect_view()}
|
||||
</ul>
|
||||
}
|
||||
```
|
||||
@@ -52,13 +52,13 @@ You can render dynamic items as part of a static list.
|
||||
|
||||
```rust
|
||||
// create a list of N signals
|
||||
let counters = (1..=length).map(|idx| create_signal(cx, idx));
|
||||
let counters = (1..=length).map(|idx| create_signal(idx));
|
||||
|
||||
// each item manages a reactive view
|
||||
// but the list itself will never change
|
||||
let counter_buttons = counters
|
||||
.map(|(count, set_count)| {
|
||||
view! { cx,
|
||||
view! {
|
||||
<li>
|
||||
<button
|
||||
on:click=move |_| set_count.update(|n| *n += 1)
|
||||
@@ -68,9 +68,9 @@ let counter_buttons = counters
|
||||
</li>
|
||||
}
|
||||
})
|
||||
.collect_view(cx);
|
||||
.collect_view();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<ul>{counter_buttons}</ul>
|
||||
}
|
||||
```
|
||||
@@ -120,8 +120,8 @@ use leptos::*;
|
||||
// 2) for lists that grow, shrink, or move items, using <For/>
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<h1>"Iteration"</h1>
|
||||
<h2>"Static List"</h2>
|
||||
<p>"Use this pattern if the list itself is static."</p>
|
||||
@@ -136,19 +136,19 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
/// to add or remove any.
|
||||
#[component]
|
||||
fn StaticList(
|
||||
cx: Scope,
|
||||
|
||||
/// How many counters to include in this list.
|
||||
length: usize,
|
||||
) -> impl IntoView {
|
||||
// create counter signals that start at incrementing numbers
|
||||
let counters = (1..=length).map(|idx| create_signal(cx, idx));
|
||||
let counters = (1..=length).map(|idx| create_signal(idx));
|
||||
|
||||
// when you have a list that doesn't change, you can
|
||||
// manipulate it using ordinary Rust iterators
|
||||
// and collect it into a Vec<_> to insert it into the DOM
|
||||
let counter_buttons = counters
|
||||
.map(|(count, set_count)| {
|
||||
view! { cx,
|
||||
view! {
|
||||
<li>
|
||||
<button
|
||||
on:click=move |_| set_count.update(|n| *n += 1)
|
||||
@@ -163,7 +163,7 @@ fn StaticList(
|
||||
// Note that if `counter_buttons` were a reactive list
|
||||
// and its value changed, this would be very inefficient:
|
||||
// it would rerender every row every time the list changed.
|
||||
view! { cx,
|
||||
view! {
|
||||
<ul>{counter_buttons}</ul>
|
||||
}
|
||||
}
|
||||
@@ -172,7 +172,7 @@ fn StaticList(
|
||||
/// remove counters.
|
||||
#[component]
|
||||
fn DynamicList(
|
||||
cx: Scope,
|
||||
|
||||
/// The number of counters to begin with.
|
||||
initial_length: usize,
|
||||
) -> impl IntoView {
|
||||
@@ -190,17 +190,17 @@ fn DynamicList(
|
||||
// we generate an initial list as in <StaticList/>
|
||||
// but this time we include the ID along with the signal
|
||||
let initial_counters = (0..initial_length)
|
||||
.map(|id| (id, create_signal(cx, id + 1)))
|
||||
.map(|id| (id, create_signal(id + 1)))
|
||||
.collect::<Vec<_>>();
|
||||
|
||||
// now we store that initial list in a signal
|
||||
// this way, we'll be able to modify the list over time,
|
||||
// adding and removing counters, and it will change reactively
|
||||
let (counters, set_counters) = create_signal(cx, initial_counters);
|
||||
let (counters, set_counters) = create_signal(initial_counters);
|
||||
|
||||
let add_counter = move |_| {
|
||||
// create a signal for the new counter
|
||||
let sig = create_signal(cx, next_counter_id + 1);
|
||||
let sig = create_signal(next_counter_id + 1);
|
||||
// add this counter to the list of counters
|
||||
set_counters.update(move |counters| {
|
||||
// since `.update()` gives us `&mut T`
|
||||
@@ -211,7 +211,7 @@ fn DynamicList(
|
||||
next_counter_id += 1;
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button on:click=add_counter>
|
||||
"Add Counter"
|
||||
@@ -231,8 +231,8 @@ fn DynamicList(
|
||||
key=|counter| counter.0
|
||||
// the view function receives each item from your `each` iterator
|
||||
// and returns a view
|
||||
view=move |cx, (id, (count, set_count))| {
|
||||
view! { cx,
|
||||
view=move |(id, (count, set_count))| {
|
||||
view! {
|
||||
<li>
|
||||
<button
|
||||
on:click=move |_| set_count.update(|n| *n += 1)
|
||||
@@ -258,7 +258,7 @@ fn DynamicList(
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -22,9 +22,9 @@ There are two important things to remember:
|
||||
`prop:value` for this reason.
|
||||
|
||||
```rust
|
||||
let (name, set_name) = create_signal(cx, "Controlled".to_string());
|
||||
let (name, set_name) = create_signal("Controlled".to_string());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<input type="text"
|
||||
on:input=move |ev| {
|
||||
// event_target_value is a Leptos helper function
|
||||
@@ -53,9 +53,9 @@ In this example, we only notify the framework when the `<form>` fires a `submit`
|
||||
event.
|
||||
|
||||
```rust
|
||||
let (name, set_name) = create_signal(cx, "Uncontrolled".to_string());
|
||||
let (name, set_name) = create_signal("Uncontrolled".to_string());
|
||||
|
||||
let input_element: NodeRef<Input> = create_node_ref(cx);
|
||||
let input_element: NodeRef<Input> = create_node_ref();
|
||||
```
|
||||
|
||||
`NodeRef` is a kind of reactive smart pointer: we can use it to access the
|
||||
@@ -89,7 +89,7 @@ We can then call `.value()` to get the value out of the input, because `NodeRef`
|
||||
gives us access to a correctly-typed HTML element.
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<form on:submit=on_submit>
|
||||
<input type="text"
|
||||
value=name
|
||||
@@ -120,8 +120,8 @@ The view should be pretty self-explanatory by now. Note two things:
|
||||
use leptos::{ev::SubmitEvent, *};
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn App() -> impl IntoView {
|
||||
view! {
|
||||
<h2>"Controlled Component"</h2>
|
||||
<ControlledComponent/>
|
||||
<h2>"Uncontrolled Component"</h2>
|
||||
@@ -130,11 +130,11 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn ControlledComponent(cx: Scope) -> impl IntoView {
|
||||
fn ControlledComponent() -> impl IntoView {
|
||||
// create a signal to hold the value
|
||||
let (name, set_name) = create_signal(cx, "Controlled".to_string());
|
||||
let (name, set_name) = create_signal("Controlled".to_string());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<input type="text"
|
||||
// fire an event whenever the input changes
|
||||
on:input=move |ev| {
|
||||
@@ -164,15 +164,15 @@ fn ControlledComponent(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn UncontrolledComponent(cx: Scope) -> impl IntoView {
|
||||
fn UncontrolledComponent() -> impl IntoView {
|
||||
// import the type for <input>
|
||||
use leptos::html::Input;
|
||||
|
||||
let (name, set_name) = create_signal(cx, "Uncontrolled".to_string());
|
||||
let (name, set_name) = create_signal("Uncontrolled".to_string());
|
||||
|
||||
// we'll use a NodeRef to store a reference to the input element
|
||||
// this will be filled when the element is created
|
||||
let input_element: NodeRef<Input> = create_node_ref(cx);
|
||||
let input_element: NodeRef<Input> = create_node_ref();
|
||||
|
||||
// fires when the form `submit` event happens
|
||||
// this will store the value of the <input> in our signal
|
||||
@@ -192,7 +192,7 @@ fn UncontrolledComponent(cx: Scope) -> impl IntoView {
|
||||
set_name(value);
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<form on:submit=on_submit>
|
||||
<input type="text"
|
||||
// here, we use the `value` *attribute* to set only
|
||||
@@ -214,7 +214,7 @@ fn UncontrolledComponent(cx: Scope) -> impl IntoView {
|
||||
// Because we defined it as `fn App`, we can now use it in a
|
||||
// template as <App/>
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -38,7 +38,7 @@ special knowledge.
|
||||
For example, let’s start with a simple signal and derived signal:
|
||||
|
||||
```rust
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
let (value, set_value) = create_signal(0);
|
||||
let is_odd = move || value() & 1 == 1;
|
||||
```
|
||||
|
||||
@@ -54,7 +54,7 @@ Let’s say I want to render some text if the number is odd, and some other text
|
||||
if it’s even. Well, how about this?
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>
|
||||
{move || if is_odd() {
|
||||
"Odd"
|
||||
@@ -81,7 +81,7 @@ let message = move || {
|
||||
}
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{message}</p>
|
||||
}
|
||||
```
|
||||
@@ -90,7 +90,7 @@ This works fine. We can make it a little shorter if we’d like, using `bool::th
|
||||
|
||||
```rust
|
||||
let message = move || is_odd().then(|| "Ding ding ding!");
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{message}</p>
|
||||
}
|
||||
```
|
||||
@@ -112,7 +112,7 @@ let message = move || {
|
||||
_ => "Even"
|
||||
}
|
||||
};
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{message}</p>
|
||||
}
|
||||
```
|
||||
@@ -131,7 +131,7 @@ above, where the value switches from even to odd on every change, this is fine.
|
||||
But consider the following example:
|
||||
|
||||
```rust
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
let message = move || if value() > 5 {
|
||||
"Big"
|
||||
@@ -139,7 +139,7 @@ let message = move || if value() > 5 {
|
||||
"Small"
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>{message}</p>
|
||||
}
|
||||
```
|
||||
@@ -194,12 +194,12 @@ the answer. You pass it a `when` condition function, a `fallback` to be shown if
|
||||
the `when` function returns `false`, and children to be rendered if `when` is `true`.
|
||||
|
||||
```rust
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<Show
|
||||
when=move || { value() > 5 }
|
||||
fallback=|cx| view! { cx, <Small/> }
|
||||
fallback=|| view! { <Small/> }
|
||||
>
|
||||
<Big/>
|
||||
</Show>
|
||||
@@ -227,19 +227,19 @@ can be a little annoying if you’re returning different HTML elements from
|
||||
different branches of a conditional:
|
||||
|
||||
```rust,compile_error
|
||||
view! { cx,
|
||||
view! {
|
||||
<main>
|
||||
{move || match is_odd() {
|
||||
true if value() == 1 => {
|
||||
// returns HtmlElement<Pre>
|
||||
view! { cx, <pre>"One"</pre> }
|
||||
view! { <pre>"One"</pre> }
|
||||
},
|
||||
false if value() == 2 => {
|
||||
// returns HtmlElement<P>
|
||||
view! { cx, <p>"Two"</p> }
|
||||
view! { <p>"Two"</p> }
|
||||
}
|
||||
// returns HtmlElement<Textarea>
|
||||
_ => view! { cx, <textarea>{value()}</textarea> }
|
||||
_ => view! { <textarea>{value()}</textarea> }
|
||||
}}
|
||||
</main>
|
||||
}
|
||||
@@ -259,24 +259,24 @@ to get yourself out of this situation:
|
||||
1. If you have multiple `HtmlElement` types, convert them to `HtmlElement<AnyElement>`
|
||||
with [`.into_any()`](https://docs.rs/leptos/latest/leptos/struct.HtmlElement.html#method.into_any)
|
||||
2. If you have a variety of view types that are not all `HtmlElement`, convert them to
|
||||
`View`s with [`.into_view(cx)`](https://docs.rs/leptos/latest/leptos/trait.IntoView.html#tymethod.into_view).
|
||||
`View`s with [`.into_view()`](https://docs.rs/leptos/latest/leptos/trait.IntoView.html#tymethod.into_view).
|
||||
|
||||
Here’s the same example, with the conversion added:
|
||||
|
||||
```rust,compile_error
|
||||
view! { cx,
|
||||
view! {
|
||||
<main>
|
||||
{move || match is_odd() {
|
||||
true if value() == 1 => {
|
||||
// returns HtmlElement<Pre>
|
||||
view! { cx, <pre>"One"</pre> }.into_any()
|
||||
view! { <pre>"One"</pre> }.into_any()
|
||||
},
|
||||
false if value() == 2 => {
|
||||
// returns HtmlElement<P>
|
||||
view! { cx, <p>"Two"</p> }.into_any()
|
||||
view! { <p>"Two"</p> }.into_any()
|
||||
}
|
||||
// returns HtmlElement<Textarea>
|
||||
_ => view! { cx, <textarea>{value()}</textarea> }.into_any()
|
||||
_ => view! { <textarea>{value()}</textarea> }.into_any()
|
||||
}}
|
||||
</main>
|
||||
}
|
||||
@@ -293,12 +293,12 @@ view! { cx,
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
fn App() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(0);
|
||||
let is_odd = move || value() & 1 == 1;
|
||||
let odd_text = move || if is_odd() { Some("How odd!") } else { None };
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Control Flow"</h1>
|
||||
|
||||
// Simple UI to update and show a value
|
||||
@@ -345,37 +345,37 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
// needed. This makes it more efficient in many cases
|
||||
// than a {move || if ...} block
|
||||
<Show when=is_odd
|
||||
fallback=|cx| view! { cx, <p>"Even steven"</p> }
|
||||
fallback=|| view! { <p>"Even steven"</p> }
|
||||
>
|
||||
<p>"Oddment"</p>
|
||||
</Show>
|
||||
|
||||
// d. Because `bool::then()` converts a `bool` to
|
||||
// `Option`, you can use it to create a show/hide toggled
|
||||
{move || is_odd().then(|| view! { cx, <p>"Oddity!"</p> })}
|
||||
{move || is_odd().then(|| view! { <p>"Oddity!"</p> })}
|
||||
|
||||
<h2>"Converting between Types"</h2>
|
||||
// e. Note: if branches return different types,
|
||||
// you can convert between them with
|
||||
// `.into_any()` (for different HTML element types)
|
||||
// or `.into_view(cx)` (for all view types)
|
||||
// or `.into_view()` (for all view types)
|
||||
{move || match is_odd() {
|
||||
true if value() == 1 => {
|
||||
// <pre> returns HtmlElement<Pre>
|
||||
view! { cx, <pre>"One"</pre> }.into_any()
|
||||
view! { <pre>"One"</pre> }.into_any()
|
||||
},
|
||||
false if value() == 2 => {
|
||||
// <p> returns HtmlElement<P>
|
||||
// so we convert into a more generic type
|
||||
view! { cx, <p>"Two"</p> }.into_any()
|
||||
view! { <p>"Two"</p> }.into_any()
|
||||
}
|
||||
_ => view! { cx, <textarea>{value()}</textarea> }.into_any()
|
||||
_ => view! { <textarea>{value()}</textarea> }.into_any()
|
||||
}}
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -10,16 +10,16 @@ Let’s start with a simple component to capture a number input.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn NumericInput(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, Ok(0));
|
||||
fn NumericInput() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(Ok(0));
|
||||
|
||||
// when input changes, try to parse a number from the input
|
||||
let on_input = move |ev| set_value(event_target_value(&ev).parse::<i32>());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<label>
|
||||
"Type a number (or not!)"
|
||||
<input on:input=on_input/>
|
||||
<input type="number" on:input=on_input/>
|
||||
<p>
|
||||
"You entered "
|
||||
<strong>{value}</strong>
|
||||
@@ -60,27 +60,27 @@ Let’s add an `<ErrorBoundary/>` to this example.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
fn NumericInput(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, Ok(0));
|
||||
fn NumericInput() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(Ok(0));
|
||||
|
||||
let on_input = move |ev| set_value(event_target_value(&ev).parse::<i32>());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Error Handling"</h1>
|
||||
<label>
|
||||
"Type a number (or something that's not a number!)"
|
||||
<input on:input=on_input/>
|
||||
<input type="number" on:input=on_input/>
|
||||
<ErrorBoundary
|
||||
// the fallback receives a signal containing current errors
|
||||
fallback=|cx, errors| view! { cx,
|
||||
fallback=|errors| view! {
|
||||
<div class="error">
|
||||
<p>"Not a number! Errors: "</p>
|
||||
// we can render a list of errors as strings, if we'd like
|
||||
<ul>
|
||||
{move || errors.get()
|
||||
.into_iter()
|
||||
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
|
||||
.collect_view(cx)
|
||||
.map(|(_, e)| view! { <li>{e.to_string()}</li>})
|
||||
.collect_view()
|
||||
}
|
||||
</ul>
|
||||
</div>
|
||||
@@ -121,13 +121,13 @@ an `<ErrorBoundary/>` will appear again.
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
fn App(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, Ok(0));
|
||||
fn App() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(Ok(0));
|
||||
|
||||
// when input changes, try to parse a number from the input
|
||||
let on_input = move |ev| set_value(event_target_value(&ev).parse::<i32>());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Error Handling"</h1>
|
||||
<label>
|
||||
"Type a number (or something that's not a number!)"
|
||||
@@ -137,7 +137,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
// <ErrorBoundary/> will be displayed.
|
||||
<ErrorBoundary
|
||||
// the fallback receives a signal containing current errors
|
||||
fallback=|cx, errors| view! { cx,
|
||||
fallback=|errors| view! {
|
||||
<div class="error">
|
||||
<p>"Not a number! Errors: "</p>
|
||||
// we can render a list of errors
|
||||
@@ -145,7 +145,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
<ul>
|
||||
{move || errors.get()
|
||||
.into_iter()
|
||||
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
|
||||
.map(|(_, e)| view! { <li>{e.to_string()}</li>})
|
||||
.collect::<Vec<_>>()
|
||||
}
|
||||
</ul>
|
||||
@@ -167,7 +167,7 @@ fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -29,17 +29,17 @@ it in the child. This lets you manipulate the state of the parent from the child
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
<ButtonA setter=set_toggled/>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn ButtonA(cx: Scope, setter: WriteSignal<bool>) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn ButtonA(setter: WriteSignal<bool>) -> impl IntoView {
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| setter.update(|value| *value = !*value)
|
||||
>
|
||||
@@ -62,9 +62,9 @@ Another approach would be to pass a callback to the child: say, `on_click`.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
<ButtonB on_click=move |_| set_toggled.update(|value| *value = !*value)/>
|
||||
}
|
||||
@@ -73,13 +73,13 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
|
||||
#[component]
|
||||
pub fn ButtonB<F>(
|
||||
cx: Scope,
|
||||
|
||||
on_click: F,
|
||||
) -> impl IntoView
|
||||
where
|
||||
F: Fn(MouseEvent) + 'static,
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<button on:click=on_click>
|
||||
"Toggle"
|
||||
</button>
|
||||
@@ -105,9 +105,9 @@ in your `view` macro in `<App/>`.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
// note the on:click instead of on_click
|
||||
// this is the same syntax as an HTML element event listener
|
||||
@@ -117,8 +117,8 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
|
||||
|
||||
#[component]
|
||||
pub fn ButtonC(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn ButtonC<F>() -> impl IntoView {
|
||||
view! {
|
||||
<button>"Toggle"</button>
|
||||
}
|
||||
}
|
||||
@@ -141,17 +141,17 @@ tree:
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
<Layout/>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Layout(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Layout() -> impl IntoView {
|
||||
view! {
|
||||
<header>
|
||||
<h1>"My Page"</h1>
|
||||
</header>
|
||||
@@ -162,8 +162,8 @@ pub fn Layout(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Content(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Content() -> impl IntoView {
|
||||
view! {
|
||||
<div class="content">
|
||||
<ButtonD/>
|
||||
</div>
|
||||
@@ -171,7 +171,7 @@ pub fn Content(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn ButtonD<F>(cx: Scope) -> impl IntoView {
|
||||
pub fn ButtonD<F>() -> impl IntoView {
|
||||
todo!()
|
||||
}
|
||||
```
|
||||
@@ -182,17 +182,17 @@ pass your `WriteSignal` to its props. You could do what’s sometimes called
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
view! { cx,
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
<Layout set_toggled/>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Layout(cx: Scope, set_toggled: WriteSignal<bool>) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Layout(d: WriteSignal<bool>) -> impl IntoView {
|
||||
view! {
|
||||
<header>
|
||||
<h1>"My Page"</h1>
|
||||
</header>
|
||||
@@ -203,8 +203,8 @@ pub fn Layout(cx: Scope, set_toggled: WriteSignal<bool>) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Content(cx: Scope, set_toggled: WriteSignal<bool>) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Content(d: WriteSignal<bool>) -> impl IntoView {
|
||||
view! {
|
||||
<div class="content">
|
||||
<ButtonD set_toggled/>
|
||||
</div>
|
||||
@@ -212,7 +212,7 @@ pub fn Content(cx: Scope, set_toggled: WriteSignal<bool>) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn ButtonD<F>(cx: Scope, set_toggled: WriteSignal<bool>) -> impl IntoView {
|
||||
pub fn ButtonD<F>(d: WriteSignal<bool>) -> impl IntoView {
|
||||
todo!()
|
||||
}
|
||||
```
|
||||
@@ -237,13 +237,13 @@ unnecessary prop drilling.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(cx, false);
|
||||
pub fn App() -> impl IntoView {
|
||||
let (toggled, set_toggled) = create_signal(false);
|
||||
|
||||
// share `set_toggled` with all children of this component
|
||||
provide_context(cx, set_toggled);
|
||||
provide_context(set_toggled);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>"Toggled? " {toggled}</p>
|
||||
<Layout/>
|
||||
}
|
||||
@@ -252,14 +252,14 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
// <Layout/> and <Content/> omitted
|
||||
|
||||
#[component]
|
||||
pub fn ButtonD(cx: Scope) -> impl IntoView {
|
||||
pub fn ButtonD() -> impl IntoView {
|
||||
// use_context searches up the context tree, hoping to
|
||||
// find a `WriteSignal<bool>`
|
||||
// in this case, I .expect() because I know I provided it
|
||||
let setter = use_context::<WriteSignal<bool>>(cx)
|
||||
let setter = use_context::<WriteSignal<bool>>()
|
||||
.expect("to have found the setter provided");
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<button
|
||||
on:click=move |_| setter.update(|value| *value = !*value)
|
||||
>
|
||||
@@ -308,20 +308,20 @@ use leptos::{ev::MouseEvent, *};
|
||||
struct SmallcapsContext(WriteSignal<bool>);
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
pub fn App() -> impl IntoView {
|
||||
// just some signals to toggle three classes on our <p>
|
||||
let (red, set_red) = create_signal(cx, false);
|
||||
let (right, set_right) = create_signal(cx, false);
|
||||
let (italics, set_italics) = create_signal(cx, false);
|
||||
let (smallcaps, set_smallcaps) = create_signal(cx, false);
|
||||
let (red, set_red) = create_signal(false);
|
||||
let (right, set_right) = create_signal(false);
|
||||
let (italics, set_italics) = create_signal(false);
|
||||
let (smallcaps, set_smallcaps) = create_signal(false);
|
||||
|
||||
// the newtype pattern isn't *necessary* here but is a good practice
|
||||
// it avoids confusion with other possible future `WriteSignal<bool>` contexts
|
||||
// and makes it easier to refer to it in ButtonC
|
||||
provide_context(cx, SmallcapsContext(set_smallcaps));
|
||||
provide_context(SmallcapsContext(set_smallcaps));
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<main>
|
||||
<p
|
||||
// class: attributes take F: Fn() => bool, and these signals all implement Fn()
|
||||
@@ -353,12 +353,12 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
/// Button A receives a signal setter and updates the signal itself
|
||||
#[component]
|
||||
pub fn ButtonA(
|
||||
cx: Scope,
|
||||
|
||||
/// Signal that will be toggled when the button is clicked.
|
||||
setter: WriteSignal<bool>,
|
||||
) -> impl IntoView {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<button
|
||||
on:click=move |_| setter.update(|value| *value = !*value)
|
||||
>
|
||||
@@ -370,7 +370,7 @@ pub fn ButtonA(
|
||||
/// Button B receives a closure
|
||||
#[component]
|
||||
pub fn ButtonB<F>(
|
||||
cx: Scope,
|
||||
|
||||
/// Callback that will be invoked when the button is clicked.
|
||||
on_click: F,
|
||||
) -> impl IntoView
|
||||
@@ -378,7 +378,7 @@ where
|
||||
F: Fn(MouseEvent) + 'static,
|
||||
{
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<button
|
||||
on:click=on_click
|
||||
>
|
||||
@@ -402,9 +402,9 @@ where
|
||||
/// Button C is a dummy: it renders a button but doesn't handle
|
||||
/// its click. Instead, the parent component adds an event listener.
|
||||
#[component]
|
||||
pub fn ButtonC(cx: Scope) -> impl IntoView {
|
||||
pub fn ButtonC() -> impl IntoView {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<button>
|
||||
"Toggle Italics"
|
||||
</button>
|
||||
@@ -414,11 +414,11 @@ pub fn ButtonC(cx: Scope) -> impl IntoView {
|
||||
/// Button D is very similar to Button A, but instead of passing the setter as a prop
|
||||
/// we get it from the context
|
||||
#[component]
|
||||
pub fn ButtonD(cx: Scope) -> impl IntoView {
|
||||
let setter = use_context::<SmallcapsContext>(cx).unwrap().0;
|
||||
pub fn ButtonD() -> impl IntoView {
|
||||
let setter = use_context::<SmallcapsContext>().unwrap().0;
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<button
|
||||
on:click=move |_| setter.update(|value| *value = !*value)
|
||||
>
|
||||
@@ -428,7 +428,7 @@ pub fn ButtonD(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -5,7 +5,7 @@ children into an HTML element. For example, imagine I have a `<FancyForm/>` comp
|
||||
that enhances an HTML `<form>`. I need some way to pass all its inputs.
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<Form>
|
||||
<fieldset>
|
||||
<label>
|
||||
@@ -28,12 +28,12 @@ other components:
|
||||
In fact, you’ve already seen these both in action in the [`<Show/>`](/view/06_control_flow.html#show) component:
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<Show
|
||||
// `when` is a normal prop
|
||||
when=move || value() > 5
|
||||
// `fallback` is a "render prop": a function that returns a view
|
||||
fallback=|cx| view! { cx, <Small/> }
|
||||
fallback=|| view! { <Small/> }
|
||||
>
|
||||
// `<Big/>` (and anything else here)
|
||||
// will be given to the `children` prop
|
||||
@@ -47,7 +47,7 @@ Let’s define a component that takes some children and a render prop.
|
||||
```rust
|
||||
#[component]
|
||||
pub fn TakesChildren<F, IV>(
|
||||
cx: Scope,
|
||||
|
||||
/// Takes a function (type F) that returns anything that can be
|
||||
/// converted into a View (type IV)
|
||||
render_prop: F,
|
||||
@@ -58,19 +58,19 @@ where
|
||||
F: Fn() -> IV,
|
||||
IV: IntoView,
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<h2>"Render Prop"</h2>
|
||||
{render_prop()}
|
||||
|
||||
<h2>"Children"</h2>
|
||||
{children(cx)}
|
||||
{children()}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
`render_prop` and `children` are both functions, so we can call them to generate
|
||||
the appropriate views. `children`, in particular, is an alias for
|
||||
`Box<dyn FnOnce(Scope) -> Fragment>`. (Aren't you glad we named it `Children` instead?)
|
||||
`Box<dyn FnOnce() -> Fragment>`. (Aren't you glad we named it `Children` instead?)
|
||||
|
||||
> If you need a `Fn` or `FnMut` here because you need to call `children` more than once,
|
||||
> we also provide `ChildrenFn` and `ChildrenMut` aliases.
|
||||
@@ -78,8 +78,8 @@ the appropriate views. `children`, in particular, is an alias for
|
||||
We can use the component like this:
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
<TakesChildren render_prop=|| view! { cx, <p>"Hi, there!"</p> }>
|
||||
view! {
|
||||
<TakesChildren render_prop=|| view! { <p>"Hi, there!"</p> }>
|
||||
// these get passed to `children`
|
||||
"Some text"
|
||||
<span>"A span"</span>
|
||||
@@ -97,15 +97,15 @@ a component that takes its children and turns them into an unordered list.
|
||||
|
||||
```rust
|
||||
#[component]
|
||||
pub fn WrapsChildren(cx: Scope, children: Children) -> impl IntoView {
|
||||
pub fn WrapsChildren(Children) -> impl IntoView {
|
||||
// Fragment has `nodes` field that contains a Vec<View>
|
||||
let children = children(cx)
|
||||
let children = children()
|
||||
.nodes
|
||||
.into_iter()
|
||||
.map(|child| view! { cx, <li>{child}</li> })
|
||||
.collect_view(cx);
|
||||
.map(|child| view! { <li>{child}</li> })
|
||||
.collect_view();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<ul>{children}</ul>
|
||||
}
|
||||
}
|
||||
@@ -114,7 +114,7 @@ pub fn WrapsChildren(cx: Scope, children: Children) -> impl IntoView {
|
||||
Calling it like this will create a list:
|
||||
|
||||
```rust
|
||||
view! { cx,
|
||||
view! {
|
||||
<WrapsChildren>
|
||||
"A"
|
||||
"B"
|
||||
@@ -142,19 +142,19 @@ use leptos::*;
|
||||
// property
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (items, set_items) = create_signal(cx, vec![0, 1, 2]);
|
||||
pub fn App() -> impl IntoView {
|
||||
let (items, set_items) = create_signal(vec![0, 1, 2]);
|
||||
let render_prop = move || {
|
||||
// items.with(...) reacts to the value without cloning
|
||||
// by applying a function. Here, we pass the `len` method
|
||||
// on a `Vec<_>` directly
|
||||
let len = move || items.with(Vec::len);
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>"Length: " {len}</p>
|
||||
}
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
// This component just displays the two kinds of children,
|
||||
// embedding them in some other markup
|
||||
<TakesChildren
|
||||
@@ -179,12 +179,12 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
/// Displays a `render_prop` and some children within markup.
|
||||
#[component]
|
||||
pub fn TakesChildren<F, IV>(
|
||||
cx: Scope,
|
||||
|
||||
/// Takes a function (type F) that returns anything that can be
|
||||
/// converted into a View (type IV)
|
||||
render_prop: F,
|
||||
/// `children` takes the `Children` type
|
||||
/// this is an alias for `Box<dyn FnOnce(Scope) -> Fragment>`
|
||||
/// this is an alias for `Box<dyn FnOnce() -> Fragment>`
|
||||
/// ... aren't you glad we named it `Children` instead?
|
||||
children: Children,
|
||||
) -> impl IntoView
|
||||
@@ -192,30 +192,30 @@ where
|
||||
F: Fn() -> IV,
|
||||
IV: IntoView,
|
||||
{
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1><code>"<TakesChildren/>"</code></h1>
|
||||
<h2>"Render Prop"</h2>
|
||||
{render_prop()}
|
||||
<hr/>
|
||||
<h2>"Children"</h2>
|
||||
{children(cx)}
|
||||
{children()}
|
||||
}
|
||||
}
|
||||
|
||||
/// Wraps each child in an `<li>` and embeds them in a `<ul>`.
|
||||
#[component]
|
||||
pub fn WrapsChildren(cx: Scope, children: Children) -> impl IntoView {
|
||||
// children(cx) returns a `Fragment`, which has a
|
||||
pub fn WrapsChildren(Children) -> impl IntoView {
|
||||
// children() returns a `Fragment`, which has a
|
||||
// `nodes` field that contains a Vec<View>
|
||||
// this means we can iterate over the children
|
||||
// to create something new!
|
||||
let children = children(cx)
|
||||
let children = children()
|
||||
.nodes
|
||||
.into_iter()
|
||||
.map(|child| view! { cx, <li>{child}</li> })
|
||||
.map(|child| view! { <li>{child}</li> })
|
||||
.collect::<Vec<_>>();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1><code>"<WrapsChildren/>"</code></h1>
|
||||
// wrap our wrapped children in a UL
|
||||
<ul>{children}</ul>
|
||||
@@ -223,7 +223,7 @@ pub fn WrapsChildren(cx: Scope, children: Children) -> impl IntoView {
|
||||
}
|
||||
|
||||
fn main() {
|
||||
leptos::mount_to_body(|cx| view! { cx, <App/> })
|
||||
leptos::mount_to_body(|| view! { <App/> })
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
@@ -2,11 +2,11 @@ use core::time::Duration;
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let show = create_rw_signal(cx, false);
|
||||
pub fn App() -> impl IntoView {
|
||||
let show = create_rw_signal(false);
|
||||
|
||||
// the CSS classes in this example are just written directly inside the `index.html`
|
||||
view! { cx,
|
||||
view! {
|
||||
<div
|
||||
class="hover-me"
|
||||
on:mouseenter=move |_| show.set(true)
|
||||
|
||||
@@ -4,9 +4,5 @@ use leptos::*;
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| {
|
||||
view! { cx,
|
||||
<App />
|
||||
}
|
||||
})
|
||||
mount_to_body(App);
|
||||
}
|
||||
|
||||
@@ -5,15 +5,14 @@ use leptos::*;
|
||||
/// You can use doc comments like this to document your component.
|
||||
#[component]
|
||||
pub fn SimpleCounter(
|
||||
cx: Scope,
|
||||
/// The starting value for the counter
|
||||
initial_value: i32,
|
||||
/// The change that should be applied each time the button is clicked.
|
||||
step: i32,
|
||||
) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, initial_value);
|
||||
let (value, set_value) = create_signal(initial_value);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button on:click=move |_| set_value(0)>"Clear"</button>
|
||||
<button on:click=move |_| set_value.update(|value| *value -= step)>"-1"</button>
|
||||
|
||||
@@ -4,8 +4,8 @@ use leptos::*;
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| {
|
||||
view! { cx,
|
||||
mount_to_body(|| {
|
||||
view! {
|
||||
<SimpleCounter
|
||||
initial_value=0
|
||||
step=1
|
||||
|
||||
@@ -15,7 +15,7 @@ fn clear() {
|
||||
// note that we start at the initial value of 10
|
||||
mount_to(
|
||||
test_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <SimpleCounter initial_value=10 step=1/> },
|
||||
|| view! { <SimpleCounter initial_value=10 step=1/> },
|
||||
);
|
||||
|
||||
// now we extract the buttons by iterating over the DOM
|
||||
@@ -32,16 +32,17 @@ fn clear() {
|
||||
|
||||
// now let's test the <div> against the expected value
|
||||
// we can do this by testing its `outerHTML`
|
||||
let runtime = create_runtime();
|
||||
assert_eq!(
|
||||
div.outer_html(),
|
||||
// here we spawn a mini reactive system, just to render the
|
||||
// test case
|
||||
run_scope(create_runtime(), |cx| {
|
||||
{
|
||||
// it's as if we're creating it with a value of 0, right?
|
||||
let (value, _set_value) = create_signal(cx, 0);
|
||||
let (value, _set_value) = create_signal(0);
|
||||
|
||||
// we can remove the event listeners because they're not rendered to HTML
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button>"Clear"</button>
|
||||
<button>"-1"</button>
|
||||
@@ -52,7 +53,7 @@ fn clear() {
|
||||
// the view returned an HtmlElement<Div>, which is a smart pointer for
|
||||
// a DOM element. So we can still just call .outer_html()
|
||||
.outer_html()
|
||||
})
|
||||
}
|
||||
);
|
||||
|
||||
// There's actually an easier way to do this...
|
||||
@@ -61,10 +62,12 @@ fn clear() {
|
||||
let comparison_wrapper = document.create_element("section").unwrap();
|
||||
leptos::mount_to(
|
||||
comparison_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <SimpleCounter initial_value=0 step=1/>},
|
||||
|| view! { <SimpleCounter initial_value=0 step=1/>},
|
||||
);
|
||||
comparison_wrapper.inner_html()
|
||||
});
|
||||
|
||||
runtime.dispose();
|
||||
}
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
@@ -75,7 +78,7 @@ fn inc() {
|
||||
|
||||
mount_to(
|
||||
test_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <SimpleCounter initial_value=0 step=1/> },
|
||||
|| view! { <SimpleCounter initial_value=0 step=1/> },
|
||||
);
|
||||
|
||||
// You can do testing with vanilla DOM operations
|
||||
@@ -118,12 +121,14 @@ fn inc() {
|
||||
|
||||
assert_eq!(text.text_content(), Some("Value: 0!".to_string()));
|
||||
|
||||
let runtime = create_runtime();
|
||||
|
||||
// Or you can test against a sample view!
|
||||
assert_eq!(
|
||||
div.outer_html(),
|
||||
run_scope(create_runtime(), |cx| {
|
||||
let (value, _) = create_signal(cx, 0);
|
||||
view! { cx,
|
||||
{
|
||||
let (value, _) = create_signal(0);
|
||||
view! {
|
||||
<div>
|
||||
<button>"Clear"</button>
|
||||
<button>"-1"</button>
|
||||
@@ -132,17 +137,17 @@ fn inc() {
|
||||
</div>
|
||||
}
|
||||
}
|
||||
.outer_html())
|
||||
.outer_html()
|
||||
);
|
||||
|
||||
inc.click();
|
||||
|
||||
assert_eq!(
|
||||
div.outer_html(),
|
||||
run_scope(create_runtime(), |cx| {
|
||||
{
|
||||
// because we've clicked, it's as if the signal is starting at 1
|
||||
let (value, _) = create_signal(cx, 1);
|
||||
view! { cx,
|
||||
let (value, _) = create_signal(1);
|
||||
view! {
|
||||
<div>
|
||||
<button>"Clear"</button>
|
||||
<button>"-1"</button>
|
||||
@@ -151,6 +156,8 @@ fn inc() {
|
||||
</div>
|
||||
}
|
||||
}
|
||||
.outer_html())
|
||||
.outer_html()
|
||||
);
|
||||
|
||||
runtime.dispose();
|
||||
}
|
||||
|
||||
@@ -25,7 +25,7 @@ leptos_meta = { path = "../../meta" }
|
||||
leptos_router = { path = "../../router" }
|
||||
log = "0.4"
|
||||
gloo-net = { git = "https://github.com/rustwasm/gloo" }
|
||||
wasm-bindgen = "=0.2.87"
|
||||
wasm-bindgen = "=0.2.86"
|
||||
serde = { version = "1", features = ["derive"] }
|
||||
|
||||
[features]
|
||||
|
||||
@@ -40,9 +40,9 @@ pub async fn clear_server_count() -> Result<i32, ServerFnError> {
|
||||
Ok(0)
|
||||
}
|
||||
#[component]
|
||||
pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
provide_meta_context(cx);
|
||||
view! { cx,
|
||||
pub fn Counters() -> impl IntoView {
|
||||
provide_meta_context();
|
||||
view! {
|
||||
<Router>
|
||||
<header>
|
||||
<h1>"Server-Side Counters"</h1>
|
||||
@@ -67,10 +67,24 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
|
||||
<main>
|
||||
<Routes>
|
||||
<Route path="" view=Counter/>
|
||||
<Route path="form" view=FormCounter/>
|
||||
<Route path="multi" view=MultiuserCounter/>
|
||||
<Route path="multi" view=NotFound/>
|
||||
<Route
|
||||
path=""
|
||||
view=|| {
|
||||
view! { <Counter/> }
|
||||
}
|
||||
/>
|
||||
<Route
|
||||
path="form"
|
||||
view=|| {
|
||||
view! { <FormCounter/> }
|
||||
}
|
||||
/>
|
||||
<Route
|
||||
path="multi"
|
||||
view=|| {
|
||||
view! { <MultiuserCounter/> }
|
||||
}
|
||||
/>
|
||||
</Routes>
|
||||
</main>
|
||||
</Router>
|
||||
@@ -82,12 +96,11 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
// it's invalidated by one of the user's own actions
|
||||
// This is the typical pattern for a CRUD app
|
||||
#[component]
|
||||
pub fn Counter(cx: Scope) -> impl IntoView {
|
||||
let dec = create_action(cx, |_| adjust_server_count(-1, "decing".into()));
|
||||
let inc = create_action(cx, |_| adjust_server_count(1, "incing".into()));
|
||||
let clear = create_action(cx, |_| clear_server_count());
|
||||
pub fn Counter() -> impl IntoView {
|
||||
let dec = create_action(|_| adjust_server_count(-1, "decing".into()));
|
||||
let inc = create_action(|_| adjust_server_count(1, "incing".into()));
|
||||
let clear = create_action(|_| clear_server_count());
|
||||
let counter = create_resource(
|
||||
cx,
|
||||
move || {
|
||||
(
|
||||
dec.version().get(),
|
||||
@@ -98,20 +111,16 @@ pub fn Counter(cx: Scope) -> impl IntoView {
|
||||
|_| get_server_count(),
|
||||
);
|
||||
|
||||
let value = move || {
|
||||
counter
|
||||
.read(cx)
|
||||
.map(|count| count.unwrap_or(0))
|
||||
.unwrap_or(0)
|
||||
};
|
||||
let value =
|
||||
move || counter.read().map(|count| count.unwrap_or(0)).unwrap_or(0);
|
||||
let error_msg = move || {
|
||||
counter.read(cx).and_then(|res| match res {
|
||||
counter.read().and_then(|res| match res {
|
||||
Ok(_) => None,
|
||||
Err(e) => Some(e),
|
||||
})
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<h2>"Simple Counter"</h2>
|
||||
<p>
|
||||
@@ -126,7 +135,7 @@ pub fn Counter(cx: Scope) -> impl IntoView {
|
||||
{move || {
|
||||
error_msg()
|
||||
.map(|msg| {
|
||||
view! { cx, <p>"Error: " {msg.to_string()}</p> }
|
||||
view! { <p>"Error: " {msg.to_string()}</p> }
|
||||
})
|
||||
}}
|
||||
</div>
|
||||
@@ -137,12 +146,11 @@ pub fn Counter(cx: Scope) -> impl IntoView {
|
||||
// It uses the same invalidation pattern as the plain counter,
|
||||
// but uses HTML forms to submit the actions
|
||||
#[component]
|
||||
pub fn FormCounter(cx: Scope) -> impl IntoView {
|
||||
let adjust = create_server_action::<AdjustServerCount>(cx);
|
||||
let clear = create_server_action::<ClearServerCount>(cx);
|
||||
pub fn FormCounter() -> impl IntoView {
|
||||
let adjust = create_server_action::<AdjustServerCount>();
|
||||
let clear = create_server_action::<ClearServerCount>();
|
||||
|
||||
let counter = create_resource(
|
||||
cx,
|
||||
move || (adjust.version().get(), clear.version().get()),
|
||||
|_| {
|
||||
log::debug!("FormCounter running fetcher");
|
||||
@@ -151,19 +159,23 @@ pub fn FormCounter(cx: Scope) -> impl IntoView {
|
||||
);
|
||||
let value = move || {
|
||||
log::debug!("FormCounter looking for value");
|
||||
counter.read(cx).and_then(|n| n.ok()).unwrap_or(0)
|
||||
counter.read().and_then(|n| n.ok()).unwrap_or(0)
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<h2>"Form Counter"</h2>
|
||||
<p>
|
||||
"This counter uses forms to set the value on the server. When progressively enhanced, it should behave identically to the “Simple Counter.”"
|
||||
</p>
|
||||
<div>
|
||||
// calling a server function is the same as POSTing to its API URL
|
||||
// so we can just do that with a form and button
|
||||
<ActionForm action=clear>
|
||||
<input type="submit" value="Clear"/>
|
||||
</ActionForm>
|
||||
// We can submit named arguments to the server functions
|
||||
// by including them as input values with the same name
|
||||
<ActionForm action=adjust>
|
||||
<input type="hidden" name="delta" value="-1"/>
|
||||
<input type="hidden" name="msg" value="form value down"/>
|
||||
@@ -185,12 +197,11 @@ pub fn FormCounter(cx: Scope) -> impl IntoView {
|
||||
// Whenever another user updates the value, it will update here
|
||||
// This is the primitive pattern for live chat, collaborative editing, etc.
|
||||
#[component]
|
||||
pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
|
||||
pub fn MultiuserCounter() -> impl IntoView {
|
||||
let dec =
|
||||
create_action(cx, |_| adjust_server_count(-1, "dec dec goose".into()));
|
||||
let inc =
|
||||
create_action(cx, |_| adjust_server_count(1, "inc inc moose".into()));
|
||||
let clear = create_action(cx, |_| clear_server_count());
|
||||
create_action(|_| adjust_server_count(-1, "dec dec goose".into()));
|
||||
let inc = create_action(|_| adjust_server_count(1, "inc inc moose".into()));
|
||||
let clear = create_action(|_| clear_server_count());
|
||||
|
||||
#[cfg(not(feature = "ssr"))]
|
||||
let multiplayer_value = {
|
||||
@@ -200,7 +211,6 @@ pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
|
||||
gloo_net::eventsource::futures::EventSource::new("/api/events")
|
||||
.expect("couldn't connect to SSE stream");
|
||||
let s = create_signal_from_stream(
|
||||
cx,
|
||||
source
|
||||
.subscribe("message")
|
||||
.unwrap()
|
||||
@@ -214,14 +224,14 @@ pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
|
||||
}),
|
||||
);
|
||||
|
||||
on_cleanup(cx, move || source.close());
|
||||
on_cleanup(move || source.close());
|
||||
s
|
||||
};
|
||||
|
||||
#[cfg(feature = "ssr")]
|
||||
let (multiplayer_value, _) = create_signal(cx, None::<i32>);
|
||||
let (multiplayer_value, _) = create_signal(None::<i32>);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<h2>"Multi-User Counter"</h2>
|
||||
<p>
|
||||
@@ -238,14 +248,3 @@ pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
|
||||
</div>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn NotFound(cx: Scope) -> impl IntoView {
|
||||
#[cfg(feature = "ssr")]
|
||||
{
|
||||
let resp = expect_context::<leptos_actix::ResponseOptions>(cx);
|
||||
resp.set_status(actix_web::http::StatusCode::NOT_FOUND);
|
||||
}
|
||||
|
||||
view! { cx, <h1>"Not Found"</h1> }
|
||||
}
|
||||
|
||||
@@ -13,8 +13,8 @@ cfg_if! {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
|
||||
mount_to_body(|cx| {
|
||||
view! { cx, <Counters/> }
|
||||
mount_to_body(|| {
|
||||
view! { <Counters/> }
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
@@ -43,7 +43,7 @@ cfg_if! {
|
||||
let conf = get_configuration(None).await.unwrap();
|
||||
|
||||
let addr = conf.leptos_options.site_addr;
|
||||
let routes = generate_route_list(|cx| view! { cx, <Counters/> });
|
||||
let routes = generate_route_list(|| view! { <Counters/> });
|
||||
|
||||
HttpServer::new(move || {
|
||||
let leptos_options = &conf.leptos_options;
|
||||
@@ -52,36 +52,15 @@ cfg_if! {
|
||||
App::new()
|
||||
.service(counter_events)
|
||||
.route("/api/{tail:.*}", leptos_actix::handle_server_fns())
|
||||
// serve JS/WASM/CSS from `pkg`
|
||||
.service(Files::new("/pkg", format!("{site_root}/pkg")))
|
||||
// serve other assets from the `assets` directory
|
||||
.service(Files::new("/assets", site_root))
|
||||
// serve the favicon from /favicon.ico
|
||||
.service(favicon)
|
||||
.leptos_routes(
|
||||
leptos_options.to_owned(),
|
||||
routes.to_owned(),
|
||||
Counters,
|
||||
)
|
||||
.app_data(web::Data::new(leptos_options.to_owned()))
|
||||
.leptos_routes(leptos_options.to_owned(), routes.to_owned(), || view! { <Counters/> })
|
||||
.service(Files::new("/", site_root))
|
||||
//.wrap(middleware::Compress::default())
|
||||
})
|
||||
.bind(&addr)?
|
||||
.run()
|
||||
.await
|
||||
}
|
||||
|
||||
#[actix_web::get("favicon.ico")]
|
||||
async fn favicon(
|
||||
leptos_options: actix_web::web::Data<leptos::LeptosOptions>,
|
||||
) -> actix_web::Result<actix_files::NamedFile> {
|
||||
let leptos_options = leptos_options.into_inner();
|
||||
let site_root = &leptos_options.site_root;
|
||||
Ok(actix_files::NamedFile::open(format!(
|
||||
"{site_root}/favicon.ico"
|
||||
))?)
|
||||
}
|
||||
}
|
||||
|
||||
// client-only main for Trunk
|
||||
else {
|
||||
|
||||
@@ -5,13 +5,13 @@ use leptos_router::*;
|
||||
///
|
||||
/// You can use doc comments like this to document your component.
|
||||
#[component]
|
||||
pub fn SimpleQueryCounter(cx: Scope) -> impl IntoView {
|
||||
let (count, set_count) = create_query_signal::<i32>(cx, "count");
|
||||
pub fn SimpleQueryCounter() -> impl IntoView {
|
||||
let (count, set_count) = create_query_signal::<i32>("count");
|
||||
let clear = move |_| set_count(None);
|
||||
let decrement = move |_| set_count(Some(count().unwrap_or(0) - 1));
|
||||
let increment = move |_| set_count(Some(count().unwrap_or(0) + 1));
|
||||
|
||||
let (msg, set_msg) = create_query_signal::<String>(cx, "message");
|
||||
let (msg, set_msg) = create_query_signal::<String>("message");
|
||||
let update_msg = move |ev| {
|
||||
let new_msg = event_target_value(&ev);
|
||||
if new_msg.is_empty() {
|
||||
@@ -21,7 +21,7 @@ pub fn SimpleQueryCounter(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button on:click=clear>"Clear"</button>
|
||||
<button on:click=decrement>"-1"</button>
|
||||
|
||||
@@ -5,8 +5,8 @@ use leptos_router::*;
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| {
|
||||
view! { cx,
|
||||
mount_to_body(|| {
|
||||
view! {
|
||||
<Router>
|
||||
<Routes>
|
||||
<Route path="" view=SimpleQueryCounter />
|
||||
|
||||
@@ -2,17 +2,17 @@ use leptos::{ev, html::*, *};
|
||||
|
||||
/// A simple counter view.
|
||||
// A component is really just a function call: it runs once to create the DOM and reactive system
|
||||
pub fn counter(cx: Scope, initial_value: i32, step: u32) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(cx, Count::new(initial_value, step));
|
||||
pub fn counter(initial_value: i32, step: u32) -> impl IntoView {
|
||||
let (count, set_count) = create_signal(Count::new(initial_value, step));
|
||||
|
||||
// elements are created by calling a function with a Scope argument
|
||||
// the function name is the same as the HTML tag name
|
||||
div(cx)
|
||||
div()
|
||||
// children can be added with .child()
|
||||
// this takes any type that implements IntoView as its argument
|
||||
// for example, a string or an HtmlElement<_>
|
||||
.child(
|
||||
button(cx)
|
||||
button()
|
||||
// typed events found in leptos::ev
|
||||
// 1) prevent typos in event names
|
||||
// 2) allow for correct type inference in callbacks
|
||||
@@ -20,14 +20,14 @@ pub fn counter(cx: Scope, initial_value: i32, step: u32) -> impl IntoView {
|
||||
.child("Clear"),
|
||||
)
|
||||
.child(
|
||||
button(cx)
|
||||
button()
|
||||
.on(ev::click, move |_| {
|
||||
set_count.update(|count| count.decrease())
|
||||
})
|
||||
.child("-1"),
|
||||
)
|
||||
.child(
|
||||
span(cx)
|
||||
span()
|
||||
.child("Value: ")
|
||||
// reactive values are passed to .child() as a tuple
|
||||
// (Scope, [child function]) so an effect can be created
|
||||
@@ -35,7 +35,7 @@ pub fn counter(cx: Scope, initial_value: i32, step: u32) -> impl IntoView {
|
||||
.child("!"),
|
||||
)
|
||||
.child(
|
||||
button(cx)
|
||||
button()
|
||||
.on(ev::click, move |_| {
|
||||
set_count.update(|count| count.increase())
|
||||
})
|
||||
|
||||
@@ -5,5 +5,5 @@ use leptos::*;
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| counter(cx, 0, 1))
|
||||
mount_to_body(|| counter(0, 1))
|
||||
}
|
||||
|
||||
@@ -41,7 +41,7 @@ fn should_clear_counter() {
|
||||
|
||||
fn open_counter() {
|
||||
remove_existing_counter();
|
||||
mount_to_body(move |cx| counter(cx, 0, 1));
|
||||
mount_to_body(move || counter(0, 1));
|
||||
}
|
||||
|
||||
fn remove_existing_counter() {
|
||||
|
||||
@@ -10,14 +10,14 @@ struct CounterUpdater {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
let (next_counter_id, set_next_counter_id) = create_signal(cx, 0);
|
||||
let (counters, set_counters) = create_signal::<CounterHolder>(cx, vec![]);
|
||||
provide_context(cx, CounterUpdater { set_counters });
|
||||
pub fn Counters() -> impl IntoView {
|
||||
let (next_counter_id, set_next_counter_id) = create_signal(0);
|
||||
let (counters, set_counters) = create_signal::<CounterHolder>(vec![]);
|
||||
provide_context(CounterUpdater { set_counters });
|
||||
|
||||
let add_counter = move |_| {
|
||||
let id = next_counter_id();
|
||||
let sig = create_signal(cx, 0);
|
||||
let sig = create_signal(0);
|
||||
set_counters.update(move |counters| counters.push((id, sig)));
|
||||
set_next_counter_id.update(|id| *id += 1);
|
||||
};
|
||||
@@ -25,7 +25,7 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
let add_many_counters = move |_| {
|
||||
let next_id = next_counter_id();
|
||||
let new_counters = (next_id..next_id + MANY_COUNTERS).map(|id| {
|
||||
let signal = create_signal(cx, 0);
|
||||
let signal = create_signal(0);
|
||||
(id, signal)
|
||||
});
|
||||
|
||||
@@ -37,7 +37,7 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
set_counters.update(|counters| counters.clear());
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<button on:click=add_counter>
|
||||
"Add Counter"
|
||||
@@ -65,8 +65,8 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
<For
|
||||
each=counters
|
||||
key=|counter| counter.0
|
||||
view=move |cx, (id, (value, set_value)): (usize, (ReadSignal<i32>, WriteSignal<i32>))| {
|
||||
view! { cx,
|
||||
view=move |(id, (value, set_value)): (usize, (ReadSignal<i32>, WriteSignal<i32>))| {
|
||||
view! {
|
||||
<Counter id value set_value/>
|
||||
}
|
||||
}
|
||||
@@ -78,12 +78,11 @@ pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
|
||||
#[component]
|
||||
fn Counter(
|
||||
cx: Scope,
|
||||
id: usize,
|
||||
value: ReadSignal<i32>,
|
||||
set_value: WriteSignal<i32>,
|
||||
) -> impl IntoView {
|
||||
let CounterUpdater { set_counters } = use_context(cx).unwrap();
|
||||
let CounterUpdater { set_counters } = use_context().unwrap();
|
||||
|
||||
let input = move |ev| {
|
||||
set_value(event_target_value(&ev).parse::<i32>().unwrap_or_default())
|
||||
@@ -91,9 +90,9 @@ fn Counter(
|
||||
|
||||
// just an example of how a cleanup function works
|
||||
// this will run when the scope is disposed, i.e., when this row is deleted
|
||||
on_cleanup(cx, || log::debug!("deleted a row"));
|
||||
on_cleanup(|| log::debug!("deleted a row"));
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<li>
|
||||
<button on:click=move |_| set_value.update(move |value| *value -= 1)>"-1"</button>
|
||||
<input type="text"
|
||||
|
||||
@@ -4,5 +4,5 @@ use leptos::*;
|
||||
fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| view! { cx, <Counters/> })
|
||||
mount_to_body(|| view! { <Counters/> })
|
||||
}
|
||||
|
||||
@@ -8,7 +8,7 @@ use web_sys::HtmlElement;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn inc() {
|
||||
mount_to_body(|cx| view! { cx, <Counters/> });
|
||||
mount_to_body(|| view! { <Counters/> });
|
||||
|
||||
let document = leptos::document();
|
||||
let div = document.query_selector("div").unwrap().unwrap();
|
||||
|
||||
@@ -5,15 +5,12 @@ edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
leptos = { path = "../../leptos", features = ["csr"] }
|
||||
leptos_meta = { path = "../../meta", features = ["csr"] }
|
||||
log = "0.4"
|
||||
console_log = "1"
|
||||
console_error_panic_hook = "0.1.7"
|
||||
|
||||
[dev-dependencies]
|
||||
wasm-bindgen = "0.2.87"
|
||||
wasm-bindgen-test = "0.3.37"
|
||||
pretty_assertions = "1.3.0"
|
||||
wasm-bindgen-test = "0.3.0"
|
||||
|
||||
[dev-dependencies.web-sys]
|
||||
features = [
|
||||
|
||||
@@ -1,6 +1,5 @@
|
||||
extend = [
|
||||
{ path = "../cargo-make/main.toml" },
|
||||
{ path = "../cargo-make/wasm-test.toml" },
|
||||
{ path = "../cargo-make/trunk_server.toml" },
|
||||
{ path = "../cargo-make/playwright-test.toml" },
|
||||
]
|
||||
|
||||
@@ -1,109 +0,0 @@
|
||||
use leptos::*;
|
||||
use leptos_meta::*;
|
||||
|
||||
const MANY_COUNTERS: usize = 1000;
|
||||
|
||||
type CounterHolder = Vec<(usize, (ReadSignal<i32>, WriteSignal<i32>))>;
|
||||
|
||||
#[derive(Copy, Clone)]
|
||||
struct CounterUpdater {
|
||||
set_counters: WriteSignal<CounterHolder>,
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Counters(cx: Scope) -> impl IntoView {
|
||||
let (next_counter_id, set_next_counter_id) = create_signal(cx, 0);
|
||||
let (counters, set_counters) = create_signal::<CounterHolder>(cx, vec![]);
|
||||
provide_context(cx, CounterUpdater { set_counters });
|
||||
provide_meta_context(cx);
|
||||
|
||||
let add_counter = move |_| {
|
||||
let id = next_counter_id.get();
|
||||
let sig = create_signal(cx, 0);
|
||||
set_counters.update(move |counters| counters.push((id, sig)));
|
||||
set_next_counter_id.update(|id| *id += 1);
|
||||
};
|
||||
|
||||
let add_many_counters = move |_| {
|
||||
let next_id = next_counter_id.get();
|
||||
let new_counters = (next_id..next_id + MANY_COUNTERS).map(|id| {
|
||||
let signal = create_signal(cx, 0);
|
||||
(id, signal)
|
||||
});
|
||||
|
||||
set_counters.update(move |counters| counters.extend(new_counters));
|
||||
set_next_counter_id.update(|id| *id += MANY_COUNTERS);
|
||||
};
|
||||
|
||||
let clear_counters = move |_| {
|
||||
set_counters.update(|counters| counters.clear());
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
<Title text="Counters (Stable)" />
|
||||
<div>
|
||||
<button on:click=add_counter>
|
||||
"Add Counter"
|
||||
</button>
|
||||
<button on:click=add_many_counters>
|
||||
{format!("Add {MANY_COUNTERS} Counters")}
|
||||
</button>
|
||||
<button on:click=clear_counters>
|
||||
"Clear Counters"
|
||||
</button>
|
||||
<p>
|
||||
"Total: "
|
||||
<span data-testid="total">{move ||
|
||||
counters.get()
|
||||
.iter()
|
||||
.map(|(_, (count, _))| count.get())
|
||||
.sum::<i32>()
|
||||
.to_string()
|
||||
}</span>
|
||||
" from "
|
||||
<span data-testid="counters">{move || counters.with(|counters| counters.len()).to_string()}</span>
|
||||
" counters."
|
||||
</p>
|
||||
<ul>
|
||||
<For
|
||||
each={move || counters.get()}
|
||||
key={|counter| counter.0}
|
||||
view=move |cx, (id, (value, set_value))| {
|
||||
view! {
|
||||
cx,
|
||||
<Counter id value set_value/>
|
||||
}
|
||||
}
|
||||
/>
|
||||
</ul>
|
||||
</div>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Counter(
|
||||
cx: Scope,
|
||||
id: usize,
|
||||
value: ReadSignal<i32>,
|
||||
set_value: WriteSignal<i32>,
|
||||
) -> impl IntoView {
|
||||
let CounterUpdater { set_counters } = use_context(cx).unwrap();
|
||||
|
||||
let input = move |ev| {
|
||||
set_value
|
||||
.set(event_target_value(&ev).parse::<i32>().unwrap_or_default())
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
<li>
|
||||
<button data-testid="decrement_count" on:click=move |_| set_value.update(move |value| *value -= 1)>"-1"</button>
|
||||
<input data-testid="counter_input" type="text"
|
||||
prop:value={move || value.get().to_string()}
|
||||
on:input=input
|
||||
/>
|
||||
<span>{value}</span>
|
||||
<button data-testid="increment_count" on:click=move |_| set_value.update(move |value| *value += 1)>"+1"</button>
|
||||
<button data-testid="remove_counter" on:click=move |_| set_counters.update(move |counters| counters.retain(|(counter_id, _)| counter_id != &id))>"x"</button>
|
||||
</li>
|
||||
}
|
||||
}
|
||||
@@ -1,8 +1,110 @@
|
||||
use counters_stable::Counters;
|
||||
use leptos::*;
|
||||
|
||||
fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| view! { cx, <Counters/> })
|
||||
mount_to_body(|| view! { <Counters/> })
|
||||
}
|
||||
|
||||
const MANY_COUNTERS: usize = 1000;
|
||||
|
||||
type CounterHolder = Vec<(usize, (ReadSignal<i32>, WriteSignal<i32>))>;
|
||||
|
||||
#[derive(Copy, Clone)]
|
||||
struct CounterUpdater {
|
||||
set_counters: WriteSignal<CounterHolder>,
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Counters() -> impl IntoView {
|
||||
let (next_counter_id, set_next_counter_id) = create_signal(0);
|
||||
let (counters, set_counters) = create_signal::<CounterHolder>(vec![]);
|
||||
provide_context(CounterUpdater { set_counters });
|
||||
|
||||
let add_counter = move |_| {
|
||||
let id = next_counter_id.get();
|
||||
let sig = create_signal(0);
|
||||
set_counters.update(move |counters| counters.push((id, sig)));
|
||||
set_next_counter_id.update(|id| *id += 1);
|
||||
};
|
||||
|
||||
let add_many_counters = move |_| {
|
||||
let next_id = next_counter_id.get();
|
||||
let new_counters = (next_id..next_id + MANY_COUNTERS).map(|id| {
|
||||
let signal = create_signal(0);
|
||||
(id, signal)
|
||||
});
|
||||
|
||||
set_counters.update(move |counters| counters.extend(new_counters));
|
||||
set_next_counter_id.update(|id| *id += MANY_COUNTERS);
|
||||
};
|
||||
|
||||
let clear_counters = move |_| {
|
||||
set_counters.update(|counters| counters.clear());
|
||||
};
|
||||
|
||||
view! {
|
||||
<div>
|
||||
<button on:click=add_counter>
|
||||
"Add Counter"
|
||||
</button>
|
||||
<button on:click=add_many_counters>
|
||||
{format!("Add {MANY_COUNTERS} Counters")}
|
||||
</button>
|
||||
<button on:click=clear_counters>
|
||||
"Clear Counters"
|
||||
</button>
|
||||
<p>
|
||||
"Total: "
|
||||
<span data-testid="total">{move ||
|
||||
counters.get()
|
||||
.iter()
|
||||
.map(|(_, (count, _))| count.get())
|
||||
.sum::<i32>()
|
||||
.to_string()
|
||||
}</span>
|
||||
" from "
|
||||
<span data-testid="counters">{move || counters.with(|counters| counters.len()).to_string()}</span>
|
||||
" counters."
|
||||
</p>
|
||||
<ul>
|
||||
<For
|
||||
each={move || counters.get()}
|
||||
key={|counter| counter.0}
|
||||
view=move |(id, (value, set_value))| {
|
||||
view! {
|
||||
<Counter id value set_value/>
|
||||
}
|
||||
}
|
||||
/>
|
||||
</ul>
|
||||
</div>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Counter(
|
||||
id: usize,
|
||||
value: ReadSignal<i32>,
|
||||
set_value: WriteSignal<i32>,
|
||||
) -> impl IntoView {
|
||||
let CounterUpdater { set_counters } = use_context().unwrap();
|
||||
|
||||
let input = move |ev| {
|
||||
set_value
|
||||
.set(event_target_value(&ev).parse::<i32>().unwrap_or_default())
|
||||
};
|
||||
|
||||
view! {
|
||||
<li>
|
||||
<button id="decrement_count" on:click=move |_| set_value.update(move |value| *value -= 1)>"-1"</button>
|
||||
<input type="text"
|
||||
prop:value={move || value.get().to_string()}
|
||||
on:input=input
|
||||
/>
|
||||
<span>{value}</span>
|
||||
<button id="increment_count" on:click=move |_| set_value.update(move |value| *value += 1)>"+1"</button>
|
||||
<button on:click=move |_| set_counters.update(move |counters| counters.retain(|(counter_id, _)| counter_id != &id))>"x"</button>
|
||||
</li>
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,17 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_increase_the_number_of_counters() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
|
||||
// When
|
||||
ui::add_1k_counters();
|
||||
ui::add_1k_counters();
|
||||
ui::add_1k_counters();
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::counters(), 3000);
|
||||
}
|
||||
@@ -1,17 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_increase_the_number_of_counters() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
|
||||
// When
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::counters(), 3);
|
||||
}
|
||||
@@ -1,19 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_reset_the_counts() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
|
||||
// When
|
||||
ui::clear_counters();
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::total(), 0);
|
||||
assert_eq!(ui::counters(), 0);
|
||||
}
|
||||
@@ -1,18 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_decrease_the_total_count() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
ui::add_counter();
|
||||
|
||||
// When
|
||||
ui::decrement_counter(1);
|
||||
ui::decrement_counter(1);
|
||||
ui::decrement_counter(1);
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::total(), -3);
|
||||
}
|
||||
@@ -1,112 +0,0 @@
|
||||
use counters_stable::Counters;
|
||||
use leptos::*;
|
||||
use wasm_bindgen::JsCast;
|
||||
use web_sys::{Element, Event, EventInit, HtmlElement, HtmlInputElement};
|
||||
|
||||
// Actions
|
||||
|
||||
pub fn add_1k_counters() {
|
||||
find_by_text("Add 1000 Counters").click();
|
||||
}
|
||||
|
||||
pub fn add_counter() {
|
||||
find_by_text("Add Counter").click();
|
||||
}
|
||||
|
||||
pub fn clear_counters() {
|
||||
find_by_text("Clear Counters").click();
|
||||
}
|
||||
|
||||
pub fn decrement_counter(index: u32) {
|
||||
counter_html_element(index, "decrement_count").click();
|
||||
}
|
||||
|
||||
pub fn enter_count(index: u32, count: i32) {
|
||||
let input = counter_input_element(index, "counter_input");
|
||||
input.set_value(count.to_string().as_str());
|
||||
let mut event_init = EventInit::new();
|
||||
event_init.bubbles(true);
|
||||
let event = Event::new_with_event_init_dict("input", &event_init).unwrap();
|
||||
input.dispatch_event(&event).unwrap();
|
||||
}
|
||||
|
||||
pub fn increment_counter(index: u32) {
|
||||
counter_html_element(index, "increment_count").click();
|
||||
}
|
||||
|
||||
pub fn remove_counter(index: u32) {
|
||||
counter_html_element(index, "remove_counter").click();
|
||||
}
|
||||
|
||||
pub fn view_counters() {
|
||||
remove_existing_counters();
|
||||
mount_to_body(|cx| view! { cx, <Counters/> });
|
||||
}
|
||||
|
||||
// Results
|
||||
|
||||
pub fn counters() -> i32 {
|
||||
data_test_id("counters").parse::<i32>().unwrap()
|
||||
}
|
||||
|
||||
pub fn title() -> String {
|
||||
leptos::document().title()
|
||||
}
|
||||
|
||||
pub fn total() -> i32 {
|
||||
data_test_id("total").parse::<i32>().unwrap()
|
||||
}
|
||||
|
||||
// Internal
|
||||
|
||||
fn counter_element(index: u32, text: &str) -> Element {
|
||||
let selector =
|
||||
format!("li:nth-child({}) [data-testid=\"{}\"]", index, text);
|
||||
leptos::document()
|
||||
.query_selector(&selector)
|
||||
.unwrap()
|
||||
.unwrap()
|
||||
}
|
||||
|
||||
fn counter_html_element(index: u32, text: &str) -> HtmlElement {
|
||||
counter_element(index, text)
|
||||
.dyn_into::<HtmlElement>()
|
||||
.unwrap()
|
||||
}
|
||||
|
||||
fn counter_input_element(index: u32, text: &str) -> HtmlInputElement {
|
||||
counter_element(index, text)
|
||||
.dyn_into::<HtmlInputElement>()
|
||||
.unwrap()
|
||||
}
|
||||
|
||||
fn data_test_id(id: &str) -> String {
|
||||
let selector = format!("[data-testid=\"{}\"]", id);
|
||||
leptos::document()
|
||||
.query_selector(&selector)
|
||||
.unwrap()
|
||||
.expect("counters not found")
|
||||
.text_content()
|
||||
.unwrap()
|
||||
}
|
||||
|
||||
fn find_by_text(text: &str) -> HtmlElement {
|
||||
let xpath = format!("//*[text()='{}']", text);
|
||||
let document = leptos::document();
|
||||
document
|
||||
.evaluate(&xpath, &document)
|
||||
.unwrap()
|
||||
.iterate_next()
|
||||
.unwrap()
|
||||
.unwrap()
|
||||
.dyn_into::<HtmlElement>()
|
||||
.unwrap()
|
||||
}
|
||||
|
||||
fn remove_existing_counters() {
|
||||
if let Some(counter) =
|
||||
leptos::document().query_selector("body div").unwrap()
|
||||
{
|
||||
counter.remove();
|
||||
}
|
||||
}
|
||||
@@ -1 +0,0 @@
|
||||
pub mod counters_page;
|
||||
@@ -1,18 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_increase_the_total_count() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
ui::add_counter();
|
||||
|
||||
// When
|
||||
ui::increment_counter(1);
|
||||
ui::increment_counter(1);
|
||||
ui::increment_counter(1);
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::total(), 3);
|
||||
}
|
||||
@@ -1,16 +0,0 @@
|
||||
use wasm_bindgen_test::*;
|
||||
|
||||
// Test Suites
|
||||
pub mod add_1k_counters;
|
||||
pub mod add_counter;
|
||||
pub mod clear_counters;
|
||||
pub mod decrement_counter;
|
||||
pub mod enter_count;
|
||||
pub mod increment_counter;
|
||||
pub mod remove_counter;
|
||||
pub mod view_counters;
|
||||
|
||||
pub mod fixtures;
|
||||
pub use fixtures::*;
|
||||
|
||||
wasm_bindgen_test_configure!(run_in_browser);
|
||||
@@ -1,18 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_decrement_the_number_of_counters() {
|
||||
// Given
|
||||
ui::view_counters();
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
ui::add_counter();
|
||||
|
||||
// When
|
||||
ui::remove_counter(2);
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::counters(), 2);
|
||||
}
|
||||
@@ -1,22 +0,0 @@
|
||||
use super::*;
|
||||
use crate::counters_page as ui;
|
||||
use pretty_assertions::assert_eq;
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_see_the_initial_counts() {
|
||||
// When
|
||||
ui::view_counters();
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::total(), 0);
|
||||
assert_eq!(ui::counters(), 0);
|
||||
}
|
||||
|
||||
#[wasm_bindgen_test]
|
||||
fn should_see_the_title() {
|
||||
// When
|
||||
ui::view_counters();
|
||||
|
||||
// Then
|
||||
assert_eq!(ui::title(), "Counters (Stable)");
|
||||
}
|
||||
@@ -1,23 +1,23 @@
|
||||
use leptos::*;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, Ok(0));
|
||||
pub fn App() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(Ok(0));
|
||||
|
||||
// when input changes, try to parse a number from the input
|
||||
let on_input = move |ev| set_value(event_target_value(&ev).parse::<i32>());
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>"Error Handling"</h1>
|
||||
<label>
|
||||
"Type a number (or something that's not a number!)"
|
||||
<input on:input=on_input/>
|
||||
<input type="number" on:input=on_input/>
|
||||
// If an `Err(_) had been rendered inside the <ErrorBoundary/>,
|
||||
// the fallback will be displayed. Otherwise, the children of the
|
||||
// <ErrorBoundary/> will be displayed.
|
||||
<ErrorBoundary
|
||||
// the fallback receives a signal containing current errors
|
||||
fallback=|cx, errors| view! { cx,
|
||||
fallback=|errors| view! {
|
||||
<div class="error">
|
||||
<p>"Not a number! Errors: "</p>
|
||||
// we can render a list of errors
|
||||
@@ -25,8 +25,8 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
<ul>
|
||||
{move || errors.get()
|
||||
.into_iter()
|
||||
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
|
||||
.collect_view(cx)
|
||||
.map(|(_, e)| view! { <li>{e.to_string()}</li>})
|
||||
.collect_view()
|
||||
}
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
@@ -4,8 +4,8 @@ use leptos::*;
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| {
|
||||
view! { cx,
|
||||
mount_to_body(|| {
|
||||
view! {
|
||||
<App/>
|
||||
}
|
||||
})
|
||||
|
||||
@@ -8,12 +8,11 @@ use leptos_axum::ResponseOptions;
|
||||
// Feel free to do more complicated things here than just displaying them.
|
||||
#[component]
|
||||
pub fn ErrorTemplate(
|
||||
cx: Scope,
|
||||
#[prop(optional)] outside_errors: Option<Errors>,
|
||||
#[prop(optional)] errors: Option<RwSignal<Errors>>,
|
||||
) -> impl IntoView {
|
||||
let errors = match outside_errors {
|
||||
Some(e) => create_rw_signal(cx, e),
|
||||
Some(e) => create_rw_signal(e),
|
||||
None => match errors {
|
||||
Some(e) => e,
|
||||
None => panic!("No Errors found and we expected errors!"),
|
||||
@@ -23,7 +22,7 @@ pub fn ErrorTemplate(
|
||||
// Get Errors from Signal
|
||||
// Downcast lets us take a type that implements `std::error::Error`
|
||||
let errors: Vec<AppError> = errors
|
||||
.get()
|
||||
.get_untracked()
|
||||
.into_iter()
|
||||
.filter_map(|(_, v)| v.downcast_ref::<AppError>().cloned())
|
||||
.collect();
|
||||
@@ -32,13 +31,13 @@ pub fn ErrorTemplate(
|
||||
// Only the response code for the first error is actually sent from the server
|
||||
// this may be customized by the specific application
|
||||
cfg_if! { if #[cfg(feature="ssr")] {
|
||||
let response = use_context::<ResponseOptions>(cx);
|
||||
let response = use_context::<ResponseOptions>();
|
||||
if let Some(response) = response {
|
||||
response.set_status(errors[0].status_code());
|
||||
}
|
||||
}}
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<h1>{if errors.len() > 1 {"Errors"} else {"Error"}}</h1>
|
||||
<For
|
||||
// a function that returns the items we're iterating over; a signal is fine
|
||||
@@ -46,10 +45,10 @@ pub fn ErrorTemplate(
|
||||
// a unique key for each item as a reference
|
||||
key=|(index, _)| *index
|
||||
// renders each item to a view
|
||||
view=move |cx, error| {
|
||||
view=move |error| {
|
||||
let error_string = error.1.to_string();
|
||||
let error_code= error.1.status_code();
|
||||
view! { cx,
|
||||
view! {
|
||||
<h2>{error_code.to_string()}</h2>
|
||||
<p>"Error: " {error_string}</p>
|
||||
}
|
||||
|
||||
@@ -22,7 +22,7 @@ cfg_if! { if #[cfg(feature = "ssr")] {
|
||||
} else{
|
||||
let handler = leptos_axum::render_app_to_stream(
|
||||
options.to_owned(),
|
||||
move |cx| view!{ cx, <App/> }
|
||||
move || view!{ <App/> }
|
||||
);
|
||||
handler(req).await.into_response()
|
||||
}
|
||||
|
||||
@@ -14,20 +14,20 @@ pub async fn cause_internal_server_error() -> Result<(), ServerFnError> {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
//let id = use_context::<String>(cx);
|
||||
provide_meta_context(cx);
|
||||
pub fn App() -> impl IntoView {
|
||||
//let id = use_context::<String>();
|
||||
provide_meta_context();
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
|
||||
<Stylesheet id="leptos" href="/pkg/errors_axum.css"/>
|
||||
<Router fallback=|cx| {
|
||||
<Router fallback=|| {
|
||||
let mut outside_errors = Errors::default();
|
||||
outside_errors.insert_with_default_key(AppError::NotFound);
|
||||
view! { cx,
|
||||
view! {
|
||||
<ErrorTemplate outside_errors/>
|
||||
}
|
||||
.into_view(cx)
|
||||
.into_view()
|
||||
}>
|
||||
<header>
|
||||
<h1>"Error Examples:"</h1>
|
||||
@@ -42,11 +42,11 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn ExampleErrors(cx: Scope) -> impl IntoView {
|
||||
pub fn ExampleErrors() -> impl IntoView {
|
||||
let generate_internal_error =
|
||||
create_server_action::<CauseInternalServerError>(cx);
|
||||
create_server_action::<CauseInternalServerError>();
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<p>
|
||||
"These links will load 404 pages since they do not exist. Verify with browser development tools: " <br/>
|
||||
<a href="/404">"This links to a page that does not exist"</a><br/>
|
||||
@@ -63,7 +63,7 @@ pub fn ExampleErrors(cx: Scope) -> impl IntoView {
|
||||
// note that the error boundaries could be placed above in the Router or lower down
|
||||
// in a particular route. The generated errors on the entire page contribute to the
|
||||
// final status code sent by the server when producing ssr pages.
|
||||
<ErrorBoundary fallback=|cx, errors| view!{ cx, <ErrorTemplate errors=errors/>}>
|
||||
<ErrorBoundary fallback=|errors| view!{ <ErrorTemplate errors=errors/>}>
|
||||
<ReturnsError/>
|
||||
</ErrorBoundary>
|
||||
</div>
|
||||
@@ -71,6 +71,6 @@ pub fn ExampleErrors(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn ReturnsError(_cx: Scope) -> impl IntoView {
|
||||
pub fn ReturnsError() -> impl IntoView {
|
||||
Err::<String, AppError>(AppError::InternalServerError)
|
||||
}
|
||||
|
||||
@@ -16,8 +16,8 @@ cfg_if! {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
|
||||
leptos::mount_to_body(|cx| {
|
||||
view! { cx, <App/> }
|
||||
leptos::mount_to_body(|| {
|
||||
view! { <App/> }
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
@@ -25,10 +25,10 @@ async fn custom_handler(
|
||||
) -> Response {
|
||||
let handler = leptos_axum::render_app_to_stream_with_context(
|
||||
options.clone(),
|
||||
move |cx| {
|
||||
provide_context(cx, id.clone());
|
||||
move || {
|
||||
provide_context(id.clone());
|
||||
},
|
||||
|cx| view! { cx, <App/> },
|
||||
|| view! { <App/> },
|
||||
);
|
||||
handler(req).await.into_response()
|
||||
}
|
||||
@@ -48,13 +48,13 @@ async fn main() {
|
||||
let conf = get_configuration(None).await.unwrap();
|
||||
let leptos_options = conf.leptos_options;
|
||||
let addr = leptos_options.site_addr;
|
||||
let routes = generate_route_list(|cx| view! { cx, <App/> }).await;
|
||||
let routes = generate_route_list(|| view! { <App/> }).await;
|
||||
|
||||
// build our application with a route
|
||||
let app = Router::new()
|
||||
.route("/api/*fn_name", post(leptos_axum::handle_server_fns))
|
||||
.route("/special/:id", get(custom_handler))
|
||||
.leptos_routes(&leptos_options, routes, |cx| view! { cx, <App/> })
|
||||
.leptos_routes(&leptos_options, routes, || view! { <App/> })
|
||||
.fallback(file_and_error_handler)
|
||||
.with_state(leptos_options);
|
||||
|
||||
|
||||
@@ -37,26 +37,26 @@ async fn fetch_cats(count: CatCount) -> Result<Vec<String>> {
|
||||
}
|
||||
}
|
||||
|
||||
pub fn fetch_example(cx: Scope) -> impl IntoView {
|
||||
let (cat_count, set_cat_count) = create_signal::<CatCount>(cx, 0);
|
||||
pub fn fetch_example() -> impl IntoView {
|
||||
let (cat_count, set_cat_count) = create_signal::<CatCount>(0);
|
||||
|
||||
// we use local_resource here because
|
||||
// 1) our error type isn't serializable/deserializable
|
||||
// 2) we're not doing server-side rendering in this example anyway
|
||||
// (during SSR, create_resource will begin loading on the server and resolve on the client)
|
||||
let cats = create_local_resource(cx, cat_count, fetch_cats);
|
||||
let cats = create_local_resource(cat_count, fetch_cats);
|
||||
|
||||
let fallback = move |cx, errors: RwSignal<Errors>| {
|
||||
let fallback = move |errors: RwSignal<Errors>| {
|
||||
let error_list = move || {
|
||||
errors.with(|errors| {
|
||||
errors
|
||||
.iter()
|
||||
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li> })
|
||||
.collect_view(cx)
|
||||
.map(|(_, e)| view! { <li>{e.to_string()}</li> })
|
||||
.collect_view()
|
||||
})
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="error">
|
||||
<h2>"Error"</h2>
|
||||
<ul>{error_list}</ul>
|
||||
@@ -69,16 +69,16 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
|
||||
// and by using the ErrorBoundary fallback to catch Err(_)
|
||||
// so we'll just implement our happy path and let the framework handle the rest
|
||||
let cats_view = move || {
|
||||
cats.read(cx).map(|data| {
|
||||
cats.read().map(|data| {
|
||||
data.map(|data| {
|
||||
data.iter()
|
||||
.map(|s| view! { cx, <p><img src={s}/></p> })
|
||||
.collect_view(cx)
|
||||
.map(|s| view! { <p><img src={s}/></p> })
|
||||
.collect_view()
|
||||
})
|
||||
})
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<label>
|
||||
"How many cats would you like?"
|
||||
@@ -93,7 +93,7 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
|
||||
</label>
|
||||
<ErrorBoundary fallback>
|
||||
<Transition fallback=move || {
|
||||
view! { cx, <div>"Loading (Suspense Fallback)..."</div> }
|
||||
view! { <div>"Loading (Suspense Fallback)..."</div> }
|
||||
}>
|
||||
<div>
|
||||
{cats_view}
|
||||
|
||||
@@ -1,25 +1,23 @@
|
||||
use gtk::prelude::*;
|
||||
use gtk::{Application, ApplicationWindow, Button};
|
||||
use gtk::{prelude::*, Application, ApplicationWindow, Button};
|
||||
use leptos::*;
|
||||
|
||||
const APP_ID: &str = "dev.leptos.Counter";
|
||||
|
||||
// Basic GTK app setup from https://gtk-rs.org/gtk4-rs/stable/latest/book/hello_world.html
|
||||
fn main() {
|
||||
_ = create_scope(create_runtime(), |cx| {
|
||||
// Create a new application
|
||||
let app = Application::builder().application_id(APP_ID).build();
|
||||
let _ = create_runtime();
|
||||
// Create a new application
|
||||
let app = Application::builder().application_id(APP_ID).build();
|
||||
|
||||
// Connect to "activate" signal of `app`
|
||||
app.connect_activate(move |app| build_ui(cx, app));
|
||||
// Connect to "activate" signal of `app`
|
||||
app.connect_activate(build_ui);
|
||||
|
||||
// Run the application
|
||||
app.run();
|
||||
});
|
||||
// Run the application
|
||||
app.run();
|
||||
}
|
||||
|
||||
fn build_ui(cx: Scope, app: &Application) {
|
||||
let button = counter_button(cx);
|
||||
fn build_ui(app: &Application) {
|
||||
let button = counter_button();
|
||||
|
||||
// Create a window and set the title
|
||||
let window = ApplicationWindow::builder()
|
||||
@@ -32,8 +30,8 @@ fn build_ui(cx: Scope, app: &Application) {
|
||||
window.present();
|
||||
}
|
||||
|
||||
fn counter_button(cx: Scope) -> Button {
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
fn counter_button() -> Button {
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
// Create a button with label and margins
|
||||
let button = Button::builder()
|
||||
@@ -50,7 +48,7 @@ fn counter_button(cx: Scope) -> Button {
|
||||
set_value.update(|value| *value += 1);
|
||||
});
|
||||
|
||||
create_effect(cx, {
|
||||
create_effect({
|
||||
let button = button.clone();
|
||||
move |_| {
|
||||
button.set_label(&format!("Count: {}", value()));
|
||||
|
||||
@@ -1,4 +1,4 @@
|
||||
use leptos::{Scope, Serializable};
|
||||
use leptos::Serializable;
|
||||
use serde::{Deserialize, Serialize};
|
||||
|
||||
pub fn story(path: &str) -> String {
|
||||
@@ -10,7 +10,7 @@ pub fn user(path: &str) -> String {
|
||||
}
|
||||
|
||||
#[cfg(not(feature = "ssr"))]
|
||||
pub async fn fetch_api<T>(cx: Scope, path: &str) -> Option<T>
|
||||
pub async fn fetch_api<T>(path: &str) -> Option<T>
|
||||
where
|
||||
T: Serializable,
|
||||
{
|
||||
@@ -29,7 +29,7 @@ where
|
||||
|
||||
// abort in-flight requests if the Scope is disposed
|
||||
// i.e., if we've navigated away from this page
|
||||
leptos::on_cleanup(cx, move || {
|
||||
leptos::on_cleanup(move || {
|
||||
if let Some(abort_controller) = abort_controller {
|
||||
abort_controller.abort()
|
||||
}
|
||||
@@ -38,7 +38,7 @@ where
|
||||
}
|
||||
|
||||
#[cfg(feature = "ssr")]
|
||||
pub async fn fetch_api<T>(_cx: Scope, path: &str) -> Option<T>
|
||||
pub async fn fetch_api<T>(path: &str) -> Option<T>
|
||||
where
|
||||
T: Serializable,
|
||||
{
|
||||
|
||||
@@ -7,18 +7,20 @@ mod routes;
|
||||
use routes::{nav::*, stories::*, story::*, users::*};
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
provide_meta_context(cx);
|
||||
let (is_routing, set_is_routing) = create_signal(cx, false);
|
||||
pub fn App() -> impl IntoView {
|
||||
provide_meta_context();
|
||||
let (is_routing, set_is_routing) = create_signal(false);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<Stylesheet id="leptos" href="/pkg/hackernews.css"/>
|
||||
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
|
||||
<Meta name="description" content="Leptos implementation of a HackerNews demo."/>
|
||||
// adding `set_is_routing` causes the router to wait for async data to load on new pages
|
||||
<Router set_is_routing>
|
||||
// shows a progress bar while async data are loading
|
||||
<RoutingProgress is_routing max_time=std::time::Duration::from_millis(250)/>
|
||||
<div class="routing-progress">
|
||||
<RoutingProgress is_routing max_time=std::time::Duration::from_millis(250)/>
|
||||
</div>
|
||||
<Nav />
|
||||
<main>
|
||||
<Routes>
|
||||
@@ -40,9 +42,7 @@ cfg_if! {
|
||||
pub fn hydrate() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
leptos::mount_to_body(move |cx| {
|
||||
view! { cx, <App/> }
|
||||
});
|
||||
leptos::mount_to_body(App);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -14,6 +14,10 @@ cfg_if! {
|
||||
async fn css() -> impl Responder {
|
||||
actix_files::NamedFile::open_async("./style.css").await
|
||||
}
|
||||
#[get("/favicon.ico")]
|
||||
async fn favicon() -> impl Responder {
|
||||
actix_files::NamedFile::open_async("./target/site//favicon.ico").await
|
||||
}
|
||||
|
||||
#[actix_web::main]
|
||||
async fn main() -> std::io::Result<()> {
|
||||
@@ -22,48 +26,31 @@ cfg_if! {
|
||||
|
||||
let addr = conf.leptos_options.site_addr;
|
||||
// Generate the list of routes in your Leptos App
|
||||
let routes = generate_route_list(|cx| view! { cx, <App/> });
|
||||
let routes = generate_route_list(App);
|
||||
|
||||
HttpServer::new(move || {
|
||||
let leptos_options = &conf.leptos_options;
|
||||
let site_root = &leptos_options.site_root;
|
||||
|
||||
App::new()
|
||||
.route("/api/{tail:.*}", leptos_actix::handle_server_fns())
|
||||
.service(Files::new("/pkg", format!("{site_root}/pkg")))
|
||||
.service(Files::new("/assets", site_root))
|
||||
.service(favicon)
|
||||
.service(css)
|
||||
.leptos_routes(
|
||||
leptos_options.to_owned(),
|
||||
routes.to_owned(),
|
||||
|cx| view! { cx, <App/> },
|
||||
)
|
||||
.app_data(web::Data::new(leptos_options.to_owned()))
|
||||
.service(favicon)
|
||||
.route("/api/{tail:.*}", leptos_actix::handle_server_fns())
|
||||
.leptos_routes(leptos_options.to_owned(), routes.to_owned(), App)
|
||||
.service(Files::new("/", site_root))
|
||||
//.wrap(middleware::Compress::default())
|
||||
})
|
||||
.bind(&addr)?
|
||||
.run()
|
||||
.await
|
||||
}
|
||||
|
||||
#[actix_web::get("favicon.ico")]
|
||||
async fn favicon(
|
||||
leptos_options: actix_web::web::Data<leptos::LeptosOptions>,
|
||||
) -> actix_web::Result<actix_files::NamedFile> {
|
||||
let leptos_options = leptos_options.into_inner();
|
||||
let site_root = &leptos_options.site_root;
|
||||
Ok(actix_files::NamedFile::open(format!(
|
||||
"{site_root}/favicon.ico"
|
||||
))?)
|
||||
}
|
||||
} else {
|
||||
fn main() {
|
||||
use hackernews::{App};
|
||||
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| view! { cx, <App/> })
|
||||
mount_to_body(App)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,9 +1,9 @@
|
||||
use leptos::{component, view, IntoView, Scope};
|
||||
use leptos::{component, view, IntoView};
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn Nav(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Nav() -> impl IntoView {
|
||||
view! {
|
||||
<header class="header">
|
||||
<nav class="inner">
|
||||
<A href="/home">
|
||||
|
||||
@@ -13,9 +13,9 @@ fn category(from: &str) -> &'static str {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
let query = use_query_map(cx);
|
||||
let params = use_params_map(cx);
|
||||
pub fn Stories() -> impl IntoView {
|
||||
let query = use_query_map();
|
||||
let params = use_params_map();
|
||||
let page = move || {
|
||||
query
|
||||
.with(|q| q.get("page").and_then(|page| page.parse::<usize>().ok()))
|
||||
@@ -27,28 +27,27 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
.unwrap_or_else(|| "top".to_string())
|
||||
};
|
||||
let stories = create_resource(
|
||||
cx,
|
||||
move || (page(), story_type()),
|
||||
move |(page, story_type)| async move {
|
||||
let path = format!("{}?page={}", category(&story_type), page);
|
||||
api::fetch_api::<Vec<api::Story>>(cx, &api::story(&path)).await
|
||||
api::fetch_api::<Vec<api::Story>>(&api::story(&path)).await
|
||||
},
|
||||
);
|
||||
let (pending, set_pending) = create_signal(cx, false);
|
||||
let (pending, set_pending) = create_signal(false);
|
||||
|
||||
let hide_more_link = move |cx| {
|
||||
let hide_more_link = move || {
|
||||
pending()
|
||||
|| stories.read(cx).unwrap_or(None).unwrap_or_default().len() < 28
|
||||
|| stories.read().unwrap_or(None).unwrap_or_default().len() < 28
|
||||
};
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<div class="news-view">
|
||||
<div class="news-list-nav">
|
||||
<span>
|
||||
{move || if page() > 1 {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<a class="page-link"
|
||||
href=move || format!("/{}?page={}", story_type(), page() - 1)
|
||||
attr:aria_label="Previous Page"
|
||||
@@ -58,7 +57,7 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
}.into_any()
|
||||
} else {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<span class="page-link disabled" aria-hidden="true">
|
||||
"< prev"
|
||||
</span>
|
||||
@@ -67,11 +66,11 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
</span>
|
||||
<span>"page " {page}</span>
|
||||
<Transition
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
>
|
||||
<span class="page-link"
|
||||
class:disabled=move || hide_more_link(cx)
|
||||
aria-hidden=move || hide_more_link(cx)
|
||||
class:disabled=hide_more_link
|
||||
aria-hidden=hide_more_link
|
||||
>
|
||||
<a href=move || format!("/{}?page={}", story_type(), page() + 1)
|
||||
aria-label="Next Page"
|
||||
@@ -84,20 +83,20 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
<main class="news-list">
|
||||
<div>
|
||||
<Transition
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
set_pending=set_pending.into()
|
||||
>
|
||||
{move || match stories.read(cx) {
|
||||
{move || match stories.read() {
|
||||
None => None,
|
||||
Some(None) => Some(view! { cx, <p>"Error loading stories."</p> }.into_any()),
|
||||
Some(None) => Some(view! { <p>"Error loading stories."</p> }.into_any()),
|
||||
Some(Some(stories)) => {
|
||||
Some(view! { cx,
|
||||
Some(view! {
|
||||
<ul>
|
||||
<For
|
||||
each=move || stories.clone()
|
||||
key=|story| story.id
|
||||
view=move |cx, story: api::Story| {
|
||||
view! { cx,
|
||||
view=move |story: api::Story| {
|
||||
view! {
|
||||
<Story story/>
|
||||
}
|
||||
}
|
||||
@@ -114,32 +113,32 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Story(cx: Scope, story: api::Story) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn Story(story: api::Story) -> impl IntoView {
|
||||
view! {
|
||||
<li class="news-item">
|
||||
<span class="score">{story.points}</span>
|
||||
<span class="title">
|
||||
{if !story.url.starts_with("item?id=") {
|
||||
view! { cx,
|
||||
view! {
|
||||
<span>
|
||||
<a href=story.url target="_blank" rel="noreferrer">
|
||||
{story.title.clone()}
|
||||
</a>
|
||||
<span class="host">"("{story.domain}")"</span>
|
||||
</span>
|
||||
}.into_view(cx)
|
||||
}.into_view()
|
||||
} else {
|
||||
let title = story.title.clone();
|
||||
view! { cx, <A href=format!("/stories/{}", story.id)>{title.clone()}</A> }.into_view(cx)
|
||||
view! { <A href=format!("/stories/{}", story.id)>{title.clone()}</A> }.into_view()
|
||||
}}
|
||||
</span>
|
||||
<br />
|
||||
<span class="meta">
|
||||
{if story.story_type != "job" {
|
||||
view! { cx,
|
||||
view! {
|
||||
<span>
|
||||
{"by "}
|
||||
{story.user.map(|user| view ! { cx, <A href=format!("/users/{user}")>{user.clone()}</A>})}
|
||||
{story.user.map(|user| view ! { <A href=format!("/users/{user}")>{user.clone()}</A>})}
|
||||
{format!(" {} | ", story.time_ago)}
|
||||
<A href=format!("/stories/{}", story.id)>
|
||||
{if story.comments_count.unwrap_or_default() > 0 {
|
||||
@@ -149,13 +148,13 @@ fn Story(cx: Scope, story: api::Story) -> impl IntoView {
|
||||
}}
|
||||
</A>
|
||||
</span>
|
||||
}.into_view(cx)
|
||||
}.into_view()
|
||||
} else {
|
||||
let title = story.title.clone();
|
||||
view! { cx, <A href=format!("/item/{}", story.id)>{title.clone()}</A> }.into_view(cx)
|
||||
view! { <A href=format!("/item/{}", story.id)>{title.clone()}</A> }.into_view()
|
||||
}}
|
||||
</span>
|
||||
{(story.story_type != "link").then(|| view! { cx,
|
||||
{(story.story_type != "link").then(|| view! {
|
||||
" "
|
||||
<span class="label">{story.story_type}</span>
|
||||
})}
|
||||
|
||||
@@ -4,37 +4,33 @@ use leptos_meta::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn Story(cx: Scope) -> impl IntoView {
|
||||
let params = use_params_map(cx);
|
||||
pub fn Story() -> impl IntoView {
|
||||
let params = use_params_map();
|
||||
let story = create_resource(
|
||||
cx,
|
||||
move || params().get("id").cloned().unwrap_or_default(),
|
||||
move |id| async move {
|
||||
if id.is_empty() {
|
||||
None
|
||||
} else {
|
||||
api::fetch_api::<api::Story>(
|
||||
cx,
|
||||
&api::story(&format!("item/{id}")),
|
||||
)
|
||||
.await
|
||||
api::fetch_api::<api::Story>(&api::story(&format!("item/{id}")))
|
||||
.await
|
||||
}
|
||||
},
|
||||
);
|
||||
let meta_description = move || {
|
||||
story
|
||||
.read(cx)
|
||||
.read()
|
||||
.and_then(|story| story.map(|story| story.title))
|
||||
.unwrap_or_else(|| "Loading story...".to_string())
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<>
|
||||
<Meta name="description" content=meta_description/>
|
||||
<Suspense fallback=|| view! { cx, "Loading..." }>
|
||||
{move || story.read(cx).map(|story| match story {
|
||||
None => view! { cx, <div class="item-view">"Error loading this story."</div> },
|
||||
Some(story) => view! { cx,
|
||||
<Suspense fallback=|| view! { "Loading..." }>
|
||||
{move || story.read().map(|story| match story {
|
||||
None => view! { <div class="item-view">"Error loading this story."</div> },
|
||||
Some(story) => view! {
|
||||
<div class="item-view">
|
||||
<div class="item-view-header">
|
||||
<a href=story.url target="_blank">
|
||||
@@ -43,7 +39,7 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
<span class="host">
|
||||
"("{story.domain}")"
|
||||
</span>
|
||||
{story.user.map(|user| view! { cx, <p class="meta">
|
||||
{story.user.map(|user| view! { <p class="meta">
|
||||
{story.points}
|
||||
" points | by "
|
||||
<A href=format!("/users/{user}")>{user.clone()}</A>
|
||||
@@ -62,7 +58,7 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
<For
|
||||
each=move || story.comments.clone().unwrap_or_default()
|
||||
key=|comment| comment.id
|
||||
view=move |cx, comment| view! { cx, <Comment comment /> }
|
||||
view=move |comment| view! { <Comment comment /> }
|
||||
/>
|
||||
</ul>
|
||||
</div>
|
||||
@@ -75,10 +71,10 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
let (open, set_open) = create_signal(cx, true);
|
||||
pub fn Comment(comment: api::Comment) -> impl IntoView {
|
||||
let (open, set_open) = create_signal(true);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<li class="comment">
|
||||
<div class="by">
|
||||
<A href=format!("/users/{}", comment.user.clone().unwrap_or_default())>{comment.user.clone()}</A>
|
||||
@@ -86,7 +82,7 @@ pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
</div>
|
||||
<div class="text" inner_html=comment.content></div>
|
||||
{(!comment.comments.is_empty()).then(|| {
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<div class="toggle" class:open=open>
|
||||
<a on:click=move |_| set_open.update(|n| *n = !*n)>
|
||||
@@ -102,12 +98,12 @@ pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
</div>
|
||||
{move || open().then({
|
||||
let comments = comment.comments.clone();
|
||||
move || view! { cx,
|
||||
move || view! {
|
||||
<ul class="comment-children">
|
||||
<For
|
||||
each=move || comments.clone()
|
||||
key=|comment| comment.id
|
||||
view=move |cx, comment: api::Comment| view! { cx, <Comment comment /> }
|
||||
view=move |comment: api::Comment| view! { <Comment comment /> }
|
||||
/>
|
||||
</ul>
|
||||
}
|
||||
|
||||
@@ -3,25 +3,24 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn User(cx: Scope) -> impl IntoView {
|
||||
let params = use_params_map(cx);
|
||||
pub fn User() -> impl IntoView {
|
||||
let params = use_params_map();
|
||||
let user = create_resource(
|
||||
cx,
|
||||
move || params().get("id").cloned().unwrap_or_default(),
|
||||
move |id| async move {
|
||||
if id.is_empty() {
|
||||
None
|
||||
} else {
|
||||
api::fetch_api::<User>(cx, &api::user(&id)).await
|
||||
api::fetch_api::<User>(&api::user(&id)).await
|
||||
}
|
||||
},
|
||||
);
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="user-view">
|
||||
<Suspense fallback=|| view! { cx, "Loading..." }>
|
||||
{move || user.read(cx).map(|user| match user {
|
||||
None => view! { cx, <h1>"User not found."</h1> }.into_any(),
|
||||
Some(user) => view! { cx,
|
||||
<Suspense fallback=|| view! { "Loading..." }>
|
||||
{move || user.read().map(|user| match user {
|
||||
None => view! { <h1>"User not found."</h1> }.into_view(),
|
||||
Some(user) => view! {
|
||||
<div>
|
||||
<h1>"User: " {&user.id}</h1>
|
||||
<ul class="meta">
|
||||
@@ -39,7 +38,7 @@ pub fn User(cx: Scope) -> impl IntoView {
|
||||
<a href=format!("https://news.ycombinator.com/threads?id={}", user.id)>"comments"</a>
|
||||
</p>
|
||||
</div>
|
||||
}.into_any()
|
||||
}.into_view()
|
||||
})}
|
||||
</Suspense>
|
||||
</div>
|
||||
|
||||
@@ -323,4 +323,9 @@ a {
|
||||
|
||||
.user-view .links a {
|
||||
text-decoration: underline
|
||||
}
|
||||
|
||||
.routing-progress, .routing-progress progress {
|
||||
height: 10px;
|
||||
width: 100%;
|
||||
}
|
||||
@@ -1,4 +1,4 @@
|
||||
use leptos::{Scope, Serializable};
|
||||
use leptos::Serializable;
|
||||
use serde::{Deserialize, Serialize};
|
||||
|
||||
pub fn story(path: &str) -> String {
|
||||
@@ -10,7 +10,7 @@ pub fn user(path: &str) -> String {
|
||||
}
|
||||
|
||||
#[cfg(not(feature = "ssr"))]
|
||||
pub async fn fetch_api<T>(cx: Scope, path: &str) -> Option<T>
|
||||
pub async fn fetch_api<T>(path: &str) -> Option<T>
|
||||
where
|
||||
T: Serializable,
|
||||
{
|
||||
@@ -27,9 +27,8 @@ where
|
||||
.await
|
||||
.ok()?;
|
||||
|
||||
// abort in-flight requests if the Scope is disposed
|
||||
// i.e., if we've navigated away from this page
|
||||
leptos::on_cleanup(cx, move || {
|
||||
// abort in-flight requests if e.g., we've navigated away from this page
|
||||
leptos::on_cleanup(move || {
|
||||
if let Some(abort_controller) = abort_controller {
|
||||
abort_controller.abort()
|
||||
}
|
||||
@@ -38,7 +37,7 @@ where
|
||||
}
|
||||
|
||||
#[cfg(feature = "ssr")]
|
||||
pub async fn fetch_api<T>(_cx: Scope, path: &str) -> Option<T>
|
||||
pub async fn fetch_api<T>(path: &str) -> Option<T>
|
||||
where
|
||||
T: Serializable,
|
||||
{
|
||||
|
||||
@@ -1,13 +1,13 @@
|
||||
use leptos::{view, Errors, For, IntoView, RwSignal, Scope, View};
|
||||
use leptos::{view, Errors, For, IntoView, RwSignal, View};
|
||||
|
||||
// A basic function to display errors served by the error boundaries. Feel free to do more complicated things
|
||||
// here than just displaying them
|
||||
pub fn error_template(cx: Scope, errors: Option<RwSignal<Errors>>) -> View {
|
||||
pub fn error_template(errors: Option<RwSignal<Errors>>) -> View {
|
||||
let Some(errors) = errors else {
|
||||
panic!("No Errors found and we expected errors!");
|
||||
};
|
||||
|
||||
view! {cx,
|
||||
view! {
|
||||
<h1>"Errors"</h1>
|
||||
<For
|
||||
// a function that returns the items we're iterating over; a signal is fine
|
||||
@@ -15,14 +15,14 @@ pub fn error_template(cx: Scope, errors: Option<RwSignal<Errors>>) -> View {
|
||||
// a unique key for each item as a reference
|
||||
key=|(key, _)| key.clone()
|
||||
// renders each item to a view
|
||||
view= move |cx, (_, error)| {
|
||||
view= move | (_, error)| {
|
||||
let error_string = error.to_string();
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<p>"Error: " {error_string}</p>
|
||||
}
|
||||
}
|
||||
/>
|
||||
}
|
||||
.into_view(cx)
|
||||
.into_view()
|
||||
}
|
||||
|
||||
@@ -21,7 +21,7 @@ if #[cfg(feature = "ssr")] {
|
||||
if res.status() == StatusCode::OK {
|
||||
res.into_response()
|
||||
} else{
|
||||
let handler = leptos_axum::render_app_to_stream(options.to_owned(), |cx| error_template(cx, None));
|
||||
let handler = leptos_axum::render_app_to_stream(options.to_owned(), || error_template( None));
|
||||
handler(req).await.into_response()
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
use cfg_if::cfg_if;
|
||||
use leptos::{component, view, IntoView, Scope};
|
||||
use leptos::{component, view, IntoView};
|
||||
use leptos_meta::*;
|
||||
use leptos_router::*;
|
||||
mod api;
|
||||
@@ -10,10 +10,10 @@ mod routes;
|
||||
use routes::{nav::*, stories::*, story::*, users::*};
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
provide_meta_context(cx);
|
||||
pub fn App() -> impl IntoView {
|
||||
provide_meta_context();
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<>
|
||||
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
|
||||
<Stylesheet id="leptos" href="/pkg/hackernews_axum.css"/>
|
||||
@@ -41,8 +41,8 @@ cfg_if! {
|
||||
pub fn hydrate() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
leptos::mount_to_body(move |cx| {
|
||||
view! { cx, <App/> }
|
||||
leptos::mount_to_body(move || {
|
||||
view! { <App/> }
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
@@ -18,14 +18,14 @@ if #[cfg(feature = "ssr")] {
|
||||
let conf = get_configuration(Some("Cargo.toml")).await.unwrap();
|
||||
let leptos_options = conf.leptos_options;
|
||||
let addr = leptos_options.site_addr;
|
||||
let routes = generate_route_list(|cx| view! { cx, <App/> }).await;
|
||||
let routes = generate_route_list(|| view! { <App/> }).await;
|
||||
|
||||
simple_logger::init_with_level(log::Level::Debug).expect("couldn't initialize logging");
|
||||
|
||||
// build our application with a route
|
||||
let app = Router::new()
|
||||
.route("/favicon.ico", get(file_and_error_handler))
|
||||
.leptos_routes(&leptos_options, routes, |cx| view! { cx, <App/> } )
|
||||
.leptos_routes(&leptos_options, routes, || view! { <App/> } )
|
||||
.fallback(file_and_error_handler)
|
||||
.with_state(leptos_options);
|
||||
|
||||
@@ -46,8 +46,8 @@ if #[cfg(feature = "ssr")] {
|
||||
pub fn main() {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
mount_to_body(|cx| {
|
||||
view! { cx, <App/> }
|
||||
mount_to_body(|| {
|
||||
view! { <App/> }
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,9 +1,9 @@
|
||||
use leptos::{component, view, IntoView, Scope};
|
||||
use leptos::{component, view, IntoView};
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn Nav(cx: Scope) -> impl IntoView {
|
||||
view! { cx,
|
||||
pub fn Nav() -> impl IntoView {
|
||||
view! {
|
||||
<header class="header">
|
||||
<nav class="inner">
|
||||
<A href="/">
|
||||
|
||||
@@ -13,9 +13,9 @@ fn category(from: &str) -> &'static str {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
let query = use_query_map(cx);
|
||||
let params = use_params_map(cx);
|
||||
pub fn Stories() -> impl IntoView {
|
||||
let query = use_query_map();
|
||||
let params = use_params_map();
|
||||
let page = move || {
|
||||
query
|
||||
.with(|q| q.get("page").and_then(|page| page.parse::<usize>().ok()))
|
||||
@@ -27,28 +27,27 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
.unwrap_or_else(|| "top".to_string())
|
||||
};
|
||||
let stories = create_resource(
|
||||
cx,
|
||||
move || (page(), story_type()),
|
||||
move |(page, story_type)| async move {
|
||||
let path = format!("{}?page={}", category(&story_type), page);
|
||||
api::fetch_api::<Vec<api::Story>>(cx, &api::story(&path)).await
|
||||
api::fetch_api::<Vec<api::Story>>(&api::story(&path)).await
|
||||
},
|
||||
);
|
||||
let (pending, set_pending) = create_signal(cx, false);
|
||||
let (pending, set_pending) = create_signal(false);
|
||||
|
||||
let hide_more_link = move |cx| {
|
||||
let hide_more_link = move || {
|
||||
pending()
|
||||
|| stories.read(cx).unwrap_or(None).unwrap_or_default().len() < 28
|
||||
|| stories.read().unwrap_or(None).unwrap_or_default().len() < 28
|
||||
};
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<div class="news-view">
|
||||
<div class="news-list-nav">
|
||||
<span>
|
||||
{move || if page() > 1 {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<a class="page-link"
|
||||
href=move || format!("/{}?page={}", story_type(), page() - 1)
|
||||
attr:aria_label="Previous Page"
|
||||
@@ -58,7 +57,7 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
}.into_any()
|
||||
} else {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<span class="page-link disabled" aria-hidden="true">
|
||||
"< prev"
|
||||
</span>
|
||||
@@ -67,11 +66,11 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
</span>
|
||||
<span>"page " {page}</span>
|
||||
<Transition
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
>
|
||||
<span class="page-link"
|
||||
class:disabled=move || hide_more_link(cx)
|
||||
aria-hidden=move || hide_more_link(cx)
|
||||
class:disabled=hide_more_link
|
||||
aria-hidden=hide_more_link
|
||||
>
|
||||
<a href=move || format!("/{}?page={}", story_type(), page() + 1)
|
||||
aria-label="Next Page"
|
||||
@@ -84,20 +83,20 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
<main class="news-list">
|
||||
<div>
|
||||
<Transition
|
||||
fallback=move || view! { cx, <p>"Loading..."</p> }
|
||||
fallback=move || view! { <p>"Loading..."</p> }
|
||||
set_pending=set_pending.into()
|
||||
>
|
||||
{move || match stories.read(cx) {
|
||||
{move || match stories.read() {
|
||||
None => None,
|
||||
Some(None) => Some(view! { cx, <p>"Error loading stories."</p> }.into_any()),
|
||||
Some(None) => Some(view! { <p>"Error loading stories."</p> }.into_any()),
|
||||
Some(Some(stories)) => {
|
||||
Some(view! { cx,
|
||||
Some(view! {
|
||||
<ul>
|
||||
<For
|
||||
each=move || stories.clone()
|
||||
key=|story| story.id
|
||||
view=move |cx, story: api::Story| {
|
||||
view! { cx,
|
||||
view=move | story: api::Story| {
|
||||
view! {
|
||||
<Story story/>
|
||||
}
|
||||
}
|
||||
@@ -114,32 +113,32 @@ pub fn Stories(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Story(cx: Scope, story: api::Story) -> impl IntoView {
|
||||
view! { cx,
|
||||
fn Story(story: api::Story) -> impl IntoView {
|
||||
view! {
|
||||
<li class="news-item">
|
||||
<span class="score">{story.points}</span>
|
||||
<span class="title">
|
||||
{if !story.url.starts_with("item?id=") {
|
||||
view! { cx,
|
||||
view! {
|
||||
<span>
|
||||
<a href=story.url target="_blank" rel="noreferrer">
|
||||
{story.title.clone()}
|
||||
</a>
|
||||
<span class="host">"("{story.domain}")"</span>
|
||||
</span>
|
||||
}.into_view(cx)
|
||||
}.into_view()
|
||||
} else {
|
||||
let title = story.title.clone();
|
||||
view! { cx, <A href=format!("/stories/{}", story.id)>{title.clone()}</A> }.into_view(cx)
|
||||
view! { <A href=format!("/stories/{}", story.id)>{title.clone()}</A> }.into_view()
|
||||
}}
|
||||
</span>
|
||||
<br />
|
||||
<span class="meta">
|
||||
{if story.story_type != "job" {
|
||||
view! { cx,
|
||||
view! {
|
||||
<span>
|
||||
{"by "}
|
||||
{story.user.map(|user| view ! { cx, <A href=format!("/users/{user}")>{user.clone()}</A>})}
|
||||
{story.user.map(|user| view ! { <A href=format!("/users/{user}")>{user.clone()}</A>})}
|
||||
{format!(" {} | ", story.time_ago)}
|
||||
<A href=format!("/stories/{}", story.id)>
|
||||
{if story.comments_count.unwrap_or_default() > 0 {
|
||||
@@ -149,13 +148,13 @@ fn Story(cx: Scope, story: api::Story) -> impl IntoView {
|
||||
}}
|
||||
</A>
|
||||
</span>
|
||||
}.into_view(cx)
|
||||
}.into_view()
|
||||
} else {
|
||||
let title = story.title.clone();
|
||||
view! { cx, <A href=format!("/item/{}", story.id)>{title.clone()}</A> }.into_view(cx)
|
||||
view! { <A href=format!("/item/{}", story.id)>{title.clone()}</A> }.into_view()
|
||||
}}
|
||||
</span>
|
||||
{(story.story_type != "link").then(|| view! { cx,
|
||||
{(story.story_type != "link").then(|| view! {
|
||||
" "
|
||||
<span class="label">{story.story_type}</span>
|
||||
})}
|
||||
|
||||
@@ -4,37 +4,33 @@ use leptos_meta::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn Story(cx: Scope) -> impl IntoView {
|
||||
let params = use_params_map(cx);
|
||||
pub fn Story() -> impl IntoView {
|
||||
let params = use_params_map();
|
||||
let story = create_resource(
|
||||
cx,
|
||||
move || params().get("id").cloned().unwrap_or_default(),
|
||||
move |id| async move {
|
||||
if id.is_empty() {
|
||||
None
|
||||
} else {
|
||||
api::fetch_api::<api::Story>(
|
||||
cx,
|
||||
&api::story(&format!("item/{id}")),
|
||||
)
|
||||
.await
|
||||
api::fetch_api::<api::Story>(&api::story(&format!("item/{id}")))
|
||||
.await
|
||||
}
|
||||
},
|
||||
);
|
||||
let meta_description = move || {
|
||||
story
|
||||
.read(cx)
|
||||
.read()
|
||||
.and_then(|story| story.map(|story| story.title))
|
||||
.unwrap_or_else(|| "Loading story...".to_string())
|
||||
};
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<>
|
||||
<Meta name="description" content=meta_description/>
|
||||
<Suspense fallback=|| view! { cx, "Loading..." }>
|
||||
{move || story.read(cx).map(|story| match story {
|
||||
None => view! { cx, <div class="item-view">"Error loading this story."</div> },
|
||||
Some(story) => view! { cx,
|
||||
<Suspense fallback=|| view! { "Loading..." }>
|
||||
{move || story.read().map(|story| match story {
|
||||
None => view! { <div class="item-view">"Error loading this story."</div> },
|
||||
Some(story) => view! {
|
||||
<div class="item-view">
|
||||
<div class="item-view-header">
|
||||
<a href=story.url target="_blank">
|
||||
@@ -43,7 +39,7 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
<span class="host">
|
||||
"("{story.domain}")"
|
||||
</span>
|
||||
{story.user.map(|user| view! { cx, <p class="meta">
|
||||
{story.user.map(|user| view! { <p class="meta">
|
||||
{story.points}
|
||||
" points | by "
|
||||
<A href=format!("/users/{user}")>{user.clone()}</A>
|
||||
@@ -62,7 +58,7 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
<For
|
||||
each=move || story.comments.clone().unwrap_or_default()
|
||||
key=|comment| comment.id
|
||||
view=move |cx, comment| view! { cx, <Comment comment /> }
|
||||
view=move | comment| view! { <Comment comment /> }
|
||||
/>
|
||||
</ul>
|
||||
</div>
|
||||
@@ -75,10 +71,10 @@ pub fn Story(cx: Scope) -> impl IntoView {
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
let (open, set_open) = create_signal(cx, true);
|
||||
pub fn Comment(comment: api::Comment) -> impl IntoView {
|
||||
let (open, set_open) = create_signal(true);
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<li class="comment">
|
||||
<div class="by">
|
||||
<A href=format!("/users/{}", comment.user.clone().unwrap_or_default())>{comment.user.clone()}</A>
|
||||
@@ -86,7 +82,7 @@ pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
</div>
|
||||
<div class="text" inner_html=comment.content></div>
|
||||
{(!comment.comments.is_empty()).then(|| {
|
||||
view! { cx,
|
||||
view! {
|
||||
<div>
|
||||
<div class="toggle" class:open=open>
|
||||
<a on:click=move |_| set_open.update(|n| *n = !*n)>
|
||||
@@ -102,12 +98,12 @@ pub fn Comment(cx: Scope, comment: api::Comment) -> impl IntoView {
|
||||
</div>
|
||||
{move || open().then({
|
||||
let comments = comment.comments.clone();
|
||||
move || view! { cx,
|
||||
move || view! {
|
||||
<ul class="comment-children">
|
||||
<For
|
||||
each=move || comments.clone()
|
||||
key=|comment| comment.id
|
||||
view=move |cx, comment: api::Comment| view! { cx, <Comment comment /> }
|
||||
view=move | comment: api::Comment| view! { <Comment comment /> }
|
||||
/>
|
||||
</ul>
|
||||
}
|
||||
|
||||
@@ -3,25 +3,24 @@ use leptos::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn User(cx: Scope) -> impl IntoView {
|
||||
let params = use_params_map(cx);
|
||||
pub fn User() -> impl IntoView {
|
||||
let params = use_params_map();
|
||||
let user = create_resource(
|
||||
cx,
|
||||
move || params().get("id").cloned().unwrap_or_default(),
|
||||
move |id| async move {
|
||||
if id.is_empty() {
|
||||
None
|
||||
} else {
|
||||
api::fetch_api::<User>(cx, &api::user(&id)).await
|
||||
api::fetch_api::<User>(&api::user(&id)).await
|
||||
}
|
||||
},
|
||||
);
|
||||
view! { cx,
|
||||
view! {
|
||||
<div class="user-view">
|
||||
<Suspense fallback=|| view! { cx, "Loading..." }>
|
||||
{move || user.read(cx).map(|user| match user {
|
||||
None => view! { cx, <h1>"User not found."</h1> }.into_any(),
|
||||
Some(user) => view! { cx,
|
||||
<Suspense fallback=|| view! { "Loading..." }>
|
||||
{move || user.read().map(|user| match user {
|
||||
None => view! { <h1>"User not found."</h1> }.into_any(),
|
||||
Some(user) => view! {
|
||||
<div>
|
||||
<h1>"User: " {&user.id}</h1>
|
||||
<ul class="meta">
|
||||
@@ -31,7 +30,7 @@ pub fn User(cx: Scope) -> impl IntoView {
|
||||
<li>
|
||||
<span class="label">"Karma: "</span> {user.karma}
|
||||
</li>
|
||||
{user.about.as_ref().map(|about| view! { cx, <li inner_html=about class="about"></li> })}
|
||||
{user.about.as_ref().map(|about| view! { <li inner_html=about class="about"></li> })}
|
||||
</ul>
|
||||
<p class="links">
|
||||
<a href=format!("https://news.ycombinator.com/submitted?id={}", user.id)>"submissions"</a>
|
||||
|
||||
@@ -6,6 +6,7 @@
|
||||
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
|
||||
<link data-trunk rel="rust" data-wasm-opt="z"/>
|
||||
<link data-trunk rel="icon" type="image/ico" href="/public/favicon.ico"/>
|
||||
<style>.danger { background: gold }</style>
|
||||
</head>
|
||||
<body>
|
||||
<span class="preloadicon glyphicon glyphicon-remove" aria-hidden="true"></span>
|
||||
|
||||
@@ -47,7 +47,7 @@ struct RowData {
|
||||
|
||||
static ID_COUNTER: AtomicUsize = AtomicUsize::new(1);
|
||||
|
||||
fn build_data(cx: Scope, count: usize) -> Vec<RowData> {
|
||||
fn build_data(count: usize) -> Vec<RowData> {
|
||||
let mut thread_rng = thread_rng();
|
||||
|
||||
let mut data = Vec::new();
|
||||
@@ -67,7 +67,7 @@ fn build_data(cx: Scope, count: usize) -> Vec<RowData> {
|
||||
|
||||
data.push(RowData {
|
||||
id: ID_COUNTER.load(Ordering::Relaxed),
|
||||
label: create_signal(cx, label),
|
||||
label: create_signal(label),
|
||||
});
|
||||
|
||||
ID_COUNTER
|
||||
@@ -80,14 +80,13 @@ fn build_data(cx: Scope, count: usize) -> Vec<RowData> {
|
||||
/// Button component.
|
||||
#[component]
|
||||
fn Button(
|
||||
cx: Scope,
|
||||
/// ID for the button element
|
||||
id: &'static str,
|
||||
/// Text that should be included
|
||||
text: &'static str,
|
||||
) -> impl IntoView {
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<div class="col-sm-6 smallpad">
|
||||
<button
|
||||
id=id
|
||||
@@ -101,26 +100,26 @@ fn Button(
|
||||
}
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
let (data, set_data) = create_signal(cx, Vec::<RowData>::new());
|
||||
let (selected, set_selected) = create_signal(cx, None::<usize>);
|
||||
pub fn App() -> impl IntoView {
|
||||
let (data, set_data) = create_signal(Vec::<RowData>::new());
|
||||
let (selected, set_selected) = create_signal(None::<usize>);
|
||||
|
||||
let remove = move |id: usize| {
|
||||
set_data.update(move |data| data.retain(|row| row.id != id));
|
||||
};
|
||||
|
||||
let run = move |_| {
|
||||
set_data(build_data(cx, 1000));
|
||||
set_data(build_data(1000));
|
||||
set_selected(None);
|
||||
};
|
||||
|
||||
let run_lots = move |_| {
|
||||
set_data(build_data(cx, 10000));
|
||||
set_data(build_data(10000));
|
||||
set_selected(None);
|
||||
};
|
||||
|
||||
let add = move |_| {
|
||||
set_data.update(move |data| data.append(&mut build_data(cx, 1000)));
|
||||
set_data.update(move |data| data.append(&mut build_data(1000)));
|
||||
};
|
||||
|
||||
let update = move |_| {
|
||||
@@ -144,10 +143,10 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
});
|
||||
};
|
||||
|
||||
let is_selected = create_selector(cx, selected);
|
||||
let is_selected = create_selector(selected);
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<div class="container">
|
||||
<div class="jumbotron">
|
||||
<div class="row">
|
||||
@@ -169,13 +168,19 @@ pub fn App(cx: Scope) -> impl IntoView {
|
||||
<For
|
||||
each={data}
|
||||
key={|row| row.id}
|
||||
view=move |cx, row: RowData| {
|
||||
view=move |row: RowData| {
|
||||
let row_id = row.id;
|
||||
let (label, _) = row.label;
|
||||
on_cleanup({
|
||||
let is_selected = is_selected.clone();
|
||||
move || {
|
||||
label.dispose();
|
||||
is_selected.remove(&Some(row_id));
|
||||
}
|
||||
});
|
||||
let is_selected = is_selected.clone();
|
||||
template! {
|
||||
cx,
|
||||
<tr class:danger={move || is_selected(Some(row_id))}>
|
||||
<tr class:danger={move || is_selected.selected(Some(row_id))}>
|
||||
<td class="col-md-1">{row_id.to_string()}</td>
|
||||
<td class="col-md-4"><a on:click=move |_| set_selected(Some(row_id))>{move || label.get()}</a></td>
|
||||
<td class="col-md-1"><a on:click=move |_| remove(row_id)><span class="glyphicon glyphicon-remove" aria-hidden="true"></span></a></td>
|
||||
|
||||
@@ -6,5 +6,5 @@ pub fn main() {
|
||||
console_error_panic_hook::set_once();
|
||||
|
||||
let root = document().query_selector("#main").unwrap().unwrap();
|
||||
mount_to(root.unchecked_into(), |cx| view! { cx, <App/> });
|
||||
mount_to(root.unchecked_into(), || view! { <App/> });
|
||||
}
|
||||
|
||||
@@ -12,10 +12,7 @@ fn add_item() {
|
||||
let _ = document.body().unwrap().append_child(&test_wrapper);
|
||||
|
||||
// start by rendering our counter and mounting it to the DOM
|
||||
mount_to(
|
||||
test_wrapper.clone().unchecked_into(),
|
||||
|cx| view! { cx, <App/> },
|
||||
);
|
||||
mount_to(test_wrapper.clone().unchecked_into(), || view! { <App/> });
|
||||
|
||||
let table = test_wrapper
|
||||
.query_selector("table")
|
||||
|
||||
@@ -3,27 +3,27 @@ use leptos_meta::*;
|
||||
use leptos_router::*;
|
||||
|
||||
#[component]
|
||||
pub fn App(cx: Scope) -> impl IntoView {
|
||||
provide_meta_context(cx);
|
||||
pub fn App() -> impl IntoView {
|
||||
provide_meta_context();
|
||||
|
||||
view! {
|
||||
cx,
|
||||
|
||||
<Stylesheet id="leptos" href="/pkg/tailwind.css"/>
|
||||
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
|
||||
<Router>
|
||||
<Routes>
|
||||
<Route path="" view= move |cx| view! { cx, <Home/> }/>
|
||||
<Route path="" view= move || view! { <Home/> }/>
|
||||
</Routes>
|
||||
</Router>
|
||||
}
|
||||
}
|
||||
|
||||
#[component]
|
||||
fn Home(cx: Scope) -> impl IntoView {
|
||||
let (value, set_value) = create_signal(cx, 0);
|
||||
fn Home() -> impl IntoView {
|
||||
let (value, set_value) = create_signal(0);
|
||||
|
||||
// thanks to https://tailwindcomponents.com/component/blue-buttons-example for the showcase layout
|
||||
view! { cx,
|
||||
view! {
|
||||
<Title text="Leptos + Tailwindcss"/>
|
||||
<main>
|
||||
<div class="bg-gradient-to-tl from-blue-800 to-blue-500 text-white font-mono flex flex-col min-h-screen">
|
||||
|
||||
@@ -22,7 +22,7 @@ cfg_if! { if #[cfg(feature = "ssr")] {
|
||||
} else{
|
||||
let handler = leptos_axum::render_app_to_stream(
|
||||
options.to_owned(),
|
||||
move |cx| view!{ cx, <App/> }
|
||||
move || view!{ <App/> }
|
||||
);
|
||||
handler(req).await.into_response()
|
||||
}
|
||||
|
||||
@@ -13,8 +13,8 @@ cfg_if! { if #[cfg(feature = "hydrate")] {
|
||||
_ = console_log::init_with_level(log::Level::Debug);
|
||||
console_error_panic_hook::set_once();
|
||||
|
||||
leptos::mount_to_body(move |cx| {
|
||||
view! { cx, <App/> }
|
||||
leptos::mount_to_body(move || {
|
||||
view! { <App/> }
|
||||
});
|
||||
}
|
||||
}}
|
||||
|
||||
@@ -19,12 +19,12 @@ async fn main() {
|
||||
let addr = conf.leptos_options.site_addr;
|
||||
let leptos_options = conf.leptos_options;
|
||||
// Generate the list of routes in your Leptos App
|
||||
let routes = generate_route_list(|cx| view! { cx, <App/> }).await;
|
||||
let routes = generate_route_list(|| view! { <App/> }).await;
|
||||
|
||||
// build our application with a route
|
||||
let app = Router::new()
|
||||
.route("/api/*fn_name", post(leptos_axum::handle_server_fns))
|
||||
.leptos_routes(&leptos_options, routes, |cx| view! { cx, <App/> })
|
||||
.leptos_routes(&leptos_options, routes, || view! { <App/> })
|
||||
.fallback(file_and_error_handler)
|
||||
.with_state(leptos_options);
|
||||
|
||||
|
||||
@@ -2,31 +2,30 @@ use leptos::{ev, *};
|
||||
|
||||
#[component]
|
||||
pub fn CredentialsForm(
|
||||
cx: Scope,
|
||||
title: &'static str,
|
||||
action_label: &'static str,
|
||||
action: Action<(String, String), ()>,
|
||||
error: Signal<Option<String>>,
|
||||
disabled: Signal<bool>,
|
||||
) -> impl IntoView {
|
||||
let (password, set_password) = create_signal(cx, String::new());
|
||||
let (email, set_email) = create_signal(cx, String::new());
|
||||
let (password, set_password) = create_signal(String::new());
|
||||
let (email, set_email) = create_signal(String::new());
|
||||
|
||||
let dispatch_action =
|
||||
move || action.dispatch((email.get(), password.get()));
|
||||
|
||||
let button_is_disabled = Signal::derive(cx, move || {
|
||||
let button_is_disabled = Signal::derive(move || {
|
||||
disabled.get() || password.get().is_empty() || email.get().is_empty()
|
||||
});
|
||||
|
||||
view! { cx,
|
||||
view! {
|
||||
<form on:submit=|ev| ev.prevent_default()>
|
||||
<p>{title}</p>
|
||||
{move || {
|
||||
error
|
||||
.get()
|
||||
.map(|err| {
|
||||
view! { cx, <p style="color:red;">{err}</p> }
|
||||
view! { <p style="color:red;">{err}</p> }
|
||||
})
|
||||
}}
|
||||
<input
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user