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Author SHA1 Message Date
Greg Johnston
8943539043 docs: clarify WASM target 2023-07-09 17:05:37 -04:00
156 changed files with 1475 additions and 4616 deletions

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@@ -14,7 +14,6 @@ jobs:
runs-on: ubuntu-latest
outputs:
matrix: ${{ steps.set-matrix.outputs.matrix }}
source_changed: ${{ steps.set-source-changed.outputs.source_changed }}
steps:
- name: Checkout
uses: actions/checkout@v3
@@ -35,40 +34,13 @@ jobs:
echo "Example Directories: $examples"
echo "matrix={\"directory\":$examples}" >> "$GITHUB_OUTPUT"
- name: Get source files that changed
id: changed-source
uses: tj-actions/changed-files@v36
with:
files: |
integrations
leptos
leptos_config
leptos_dom
leptos_hot_reload
leptos_macro
leptos_reactive
leptos_server
meta
router
server_fn
server_fn_macro
- name: List source files that changed
run: echo '${{ steps.changed-source.outputs.all_changed_files }}'
- name: Set source_changed
id: set-source-changed
run: |
echo "source_changed=${{ steps.changed-source.outputs.any_changed }}" >> "$GITHUB_OUTPUT"
matrix-job:
name: Check
needs: [setup]
if: needs.setup.outputs.source_changed == 'true'
strategy:
matrix: ${{ fromJSON(needs.setup.outputs.matrix) }}
fail-fast: false
uses: ./.github/workflows/run-cargo-make-task.yml
uses: ./.github/workflows/run-example-task.yml
with:
directory: ${{ matrix.directory }}
cargo_make_task: "check"

46
.github/workflows/check.yml vendored Normal file
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@@ -0,0 +1,46 @@
name: Check
on:
push:
branches: [main]
pull_request:
branches: [main]
env:
CARGO_TERM_COLOR: always
CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
jobs:
test:
name: Run `cargo check` ${{ matrix.os }} (using rustc ${{ matrix.rust }})
runs-on: ${{ matrix.os }}
strategy:
matrix:
rust:
- nightly
os:
- ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Setup Rust
uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
components: rustfmt
- name: Add wasm32-unknown-unknown
run: rustup target add wasm32-unknown-unknown
- name: Setup cargo-make
uses: davidB/rust-cargo-make@v1
- name: Cargo generate-lockfile
run: cargo generate-lockfile
- uses: Swatinem/rust-cache@v2
- name: Run cargo check on all libraries
run: cargo make --profile=github-actions check

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@@ -1,75 +0,0 @@
name: CI
on:
push:
branches:
- main
pull_request:
branches:
- main
jobs:
setup:
name: Detect Changes
runs-on: ubuntu-latest
outputs:
source_changed: ${{ steps.set-source-changed.outputs.source_changed }}
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Get source files that changed
id: changed-source
uses: tj-actions/changed-files@v36
with:
files: |
integrations
leptos
leptos_config
leptos_dom
leptos_hot_reload
leptos_macro
leptos_reactive
leptos_server
meta
router
server_fn
server_fn_macro
- name: List source files that changed
run: echo '${{ steps.changed-source.outputs.all_changed_files }}'
- name: Set source_changed
id: set-source-changed
run: |
echo "source_changed=${{ steps.changed-source.outputs.any_changed }}" >> "$GITHUB_OUTPUT"
matrix-job:
name: CI
needs: [setup]
if: needs.setup.outputs.source_changed == 'true'
strategy:
matrix:
directory:
[
integrations/actix,
integrations/axum,
integrations/viz,
integrations/utils,
leptos,
leptos_config,
leptos_dom,
leptos_hot_reload,
leptos_macro,
leptos_reactive,
leptos_server,
meta,
router,
server_fn,
server_fn/server_fn_macro_default,
server_fn_macro,
]
uses: ./.github/workflows/run-cargo-make-task.yml
with:
directory: ${{ matrix.directory }}
cargo_make_task: "ci"

34
.github/workflows/fmt.yml vendored Normal file
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@@ -0,0 +1,34 @@
name: Format
on:
push:
branches: [main]
pull_request:
branches: [main]
env:
CARGO_TERM_COLOR: always
jobs:
test:
name: Run rustfmt
runs-on: ${{ matrix.os }}
strategy:
matrix:
rust:
- nightly
os:
- ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Setup Rust
uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
components: rustfmt
- name: Run Rustfmt
run: cargo fmt -- --check

View File

@@ -1,4 +1,4 @@
name: Run Task
name: Run Example Task
on:
workflow_call:
@@ -27,9 +27,9 @@ jobs:
steps:
# Setup environment
- name: Install playwright browser dependencies
run: |
run: |
sudo apt-get update
sudo apt-get install libegl1 libvpx7 libevent-2.1-7 libopus0 libopengl0 libwoff1 libharfbuzz-icu0 libgstreamer-plugins-base1.0-0 libgstreamer-gl1.0-0 libhyphen0 libmanette-0.2-0 libgles2 gstreamer1.0-libav
sudo apt-get install libegl1 libvpx7 libevent-2.1-7 libopus0 libopengl0 libwoff1 libharfbuzz-icu0 libgstreamer-plugins-base1.0-0 libgstreamer-gl1.0-0 libhyphen0 libmanette-0.2-0 libgles2 gstreamer1.0-libav
- uses: actions/checkout@v3
@@ -84,7 +84,7 @@ jobs:
restore-keys: |
${{ runner.os }}-pnpm-store-
# Run Cargo Make Task
# Verify project
- name: ${{ inputs.cargo_make_task }}
run: |
if [ "${{ inputs.directory }}" = "INTERNAL" ]; then

46
.github/workflows/test.yml vendored Normal file
View File

@@ -0,0 +1,46 @@
name: Test
on:
push:
branches: [main]
pull_request:
branches: [main]
env:
CARGO_TERM_COLOR: always
CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
jobs:
test:
name: Run tests ${{ matrix.os }} (using rustc ${{ matrix.rust }})
runs-on: ${{ matrix.os }}
strategy:
matrix:
rust:
- nightly
os:
- ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Setup Rust
uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
components: rustfmt
- name: Add wasm32-unknown-unknown
run: rustup target add wasm32-unknown-unknown
- name: Setup cargo-make
uses: davidB/rust-cargo-make@v1
- name: Cargo generate-lockfile
run: cargo generate-lockfile
- uses: Swatinem/rust-cache@v2
- name: Run tests with all features
run: cargo make --profile=github-actions test

View File

@@ -41,7 +41,7 @@ jobs:
strategy:
matrix: ${{ fromJSON(needs.setup.outputs.matrix) }}
fail-fast: false
uses: ./.github/workflows/run-cargo-make-task.yml
uses: ./.github/workflows/run-example-task.yml
with:
directory: ${{ matrix.directory }}
cargo_make_task: "verify-flow"

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@@ -65,7 +65,7 @@ jobs:
strategy:
matrix: ${{ fromJSON(needs.setup.outputs.matrix) }}
fail-fast: false
uses: ./.github/workflows/run-cargo-make-task.yml
uses: ./.github/workflows/run-example-task.yml
with:
directory: ${{ matrix.directory }}
cargo_make_task: "verify-flow"

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@@ -220,8 +220,8 @@ for reference: they include large amounts of manual SSR route handling, etc.
## `cargo-leptos` helpers
`leptos_config` and `leptos_hot_reload` exist to support two different features
of `cargo-leptos`, namely its configuration and its view-patching/hot-reloading
features.
of `cargo-leptos`, namely its configuration and its view-patching/hot-
reloading features.
Its important to say that the main feature `cargo-leptos` remains its ability
to conveniently tie together different build tooling, compiling your app to

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@@ -70,25 +70,6 @@ are a few guidelines that will make it a better experience for everyone:
`cargo-make` and using `cargo make check && cargo make test && cargo make
check-examples`.
## Before Submitting a PR
We have a fairly extensive CI setup that runs both lints (like `rustfmt` and `clippy`)
and tests on PRs. You can run most of these locally if you have `cargo-make` installed.
If you added an example, make sure to add it to the list in `examples/Makefile.toml`.
From the root directory of the repo, run
- `cargo +nightly fmt`
- `cargo +nightly make check`
- `cargo +nightly make test`
- `cargo +nightly make check-examples`
- `cargo +nightly make --profile=github-actions ci`
If you modified an example:
- `cd examples/your_example`
- `cargo +nightly fmt -- --config-path ../..`
- `cargo +nightly make --profile=github-actions verify-flow`
## Architecture
See [ARCHITECTURE.md](./ARCHITECTURE.md).

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@@ -26,22 +26,22 @@ members = [
exclude = ["benchmarks", "examples"]
[workspace.package]
version = "0.4.5"
version = "0.4.2"
[workspace.dependencies]
leptos = { path = "./leptos", version = "0.4.5" }
leptos_dom = { path = "./leptos_dom", version = "0.4.5" }
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.4.5" }
leptos_macro = { path = "./leptos_macro", version = "0.4.5" }
leptos_reactive = { path = "./leptos_reactive", version = "0.4.5" }
leptos_server = { path = "./leptos_server", version = "0.4.5" }
server_fn = { path = "./server_fn", version = "0.4.5" }
server_fn_macro = { path = "./server_fn_macro", version = "0.4.5" }
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", version = "0.4.5" }
leptos_config = { path = "./leptos_config", version = "0.4.5" }
leptos_router = { path = "./router", version = "0.4.5" }
leptos_meta = { path = "./meta", version = "0.4.5" }
leptos_integration_utils = { path = "./integrations/utils", version = "0.4.5" }
leptos = { path = "./leptos", version = "0.4.2" }
leptos_dom = { path = "./leptos_dom", version = "0.4.2" }
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.4.2" }
leptos_macro = { path = "./leptos_macro", version = "0.4.2" }
leptos_reactive = { path = "./leptos_reactive", version = "0.4.2" }
leptos_server = { path = "./leptos_server", version = "0.4.2" }
server_fn = { path = "./server_fn", version = "0.4.2" }
server_fn_macro = { path = "./server_fn_macro", version = "0.4.2" }
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", version = "0.4.2" }
leptos_config = { path = "./leptos_config", version = "0.4.2" }
leptos_router = { path = "./router", version = "0.4.2" }
leptos_meta = { path = "./meta", version = "0.4.2" }
leptos_integration_utils = { path = "./integrations/utils", version = "0.4.2" }
[profile.release]
codegen-units = 1

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@@ -3,25 +3,122 @@
# cargo install --force cargo-make
############
[env]
CARGO_MAKE_EXTEND_WORKSPACE_MAKEFILE = true
[config]
# make tasks run at the workspace root
default_to_workspace = false
[tasks.check]
clear = true
dependencies = [
"check-all",
"check-wasm",
"check-all-release",
"check-wasm-release",
]
[tasks.check-all]
command = "cargo"
args = ["+nightly", "check-all-features"]
install_crate = "cargo-all-features"
[tasks.check-wasm]
clear = true
dependencies = [{ name = "check-wasm", path = "leptos" }]
[tasks.check-all-release]
command = "cargo"
args = ["+nightly", "check-all-features"]
install_crate = "cargo-all-features"
[tasks.check-wasm-release]
clear = true
dependencies = [{ name = "check-wasm-release", path = "leptos" }]
[tasks.check-examples]
clear = true
dependencies = [
{ name = "check", path = "examples/counter" },
{ name = "check", path = "examples/counter_isomorphic" },
{ name = "check", path = "examples/counters" },
{ name = "check", path = "examples/error_boundary" },
{ name = "check", path = "examples/errors_axum" },
{ name = "check", path = "examples/fetch" },
{ name = "check", path = "examples/hackernews" },
{ name = "check", path = "examples/hackernews_axum" },
{ name = "check", path = "examples/js-framework-benchmark" },
{ name = "check", path = "examples/leptos-tailwind-axum" },
{ name = "check", path = "examples/login_with_token_csr_only" },
{ name = "check", path = "examples/parent_child" },
{ name = "check", path = "examples/router" },
{ name = "check", path = "examples/session_auth_axum" },
{ name = "check", path = "examples/slots" },
{ name = "check", path = "examples/ssr_modes" },
{ name = "check", path = "examples/ssr_modes_axum" },
{ name = "check", path = "examples/tailwind" },
{ name = "check", path = "examples/tailwind_csr_trunk" },
{ name = "check", path = "examples/timer" },
{ name = "check", path = "examples/todo_app_sqlite" },
{ name = "check", path = "examples/todo_app_sqlite_axum" },
{ name = "check", path = "examples/todo_app_sqlite_viz" },
{ name = "check", path = "examples/todomvc" },
]
[tasks.check-stable]
workspace = false
clear = true
dependencies = [
{ name = "check", path = "examples/counter_without_macros" },
{ name = "check", path = "examples/counters_stable" },
]
[tasks.ci-examples]
workspace = false
[tasks.test]
clear = true
dependencies = [
"test-all",
"test-leptos_macro-example",
"doc-leptos_macro-example",
]
[tasks.test-all]
command = "cargo"
args = ["+nightly", "test-all-features"]
install_crate = "cargo-all-features"
[tasks.test-leptos_macro-example]
description = "Tests the leptos_macro/example to check if macro handles doc comments correctly"
command = "cargo"
args = ["+nightly", "test", "--doc"]
cwd = "leptos_macro/example"
install_crate = false
[tasks.doc-leptos_macro-example]
description = "Docs the leptos_macro/example to check if macro handles doc comments correctly"
command = "cargo"
args = ["+nightly", "doc"]
cwd = "leptos_macro/example"
install_crate = false
[tasks.test-examples]
description = "Run all unit and web tests for examples"
cwd = "examples"
command = "cargo"
args = ["make", "ci-clean"]
args = ["make", "test-unit-and-web"]
[tasks.verify-examples]
description = "Run all quality checks and tests for examples"
env = { CLEAN_AFTER_VERIFY = "true" }
cwd = "examples"
command = "cargo"
args = ["make", "verify-flow"]
[tasks.clean-examples]
workspace = false
description = "Clean all example projects"
cwd = "examples"
command = "cargo"
args = ["make", "clean"]
args = ["make", "clean-all"]
[env]
RUSTFLAGS = ""
LEPTOS_OUTPUT_NAME = "ci" # allows examples to check/build without cargo-leptos
[env.github-actions]
RUSTFLAGS = "-D warnings"

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@@ -107,7 +107,7 @@ Open browser to [http://localhost:3000/](http://localhost:3000/).
### Whats up with the name?
_Leptos_ (λεπτός) is an ancient Greek word meaning “thin, light, refined, fine-grained.” To me, a classicist and not a dog owner, it evokes the lightweight reactive system that powers the framework. I've since learned the same word is at the root of the medical term “leptospirosis,” a blood infection that affects humans and animals... My bad. No dogs were harmed in the creation of this framework.
_Leptos_ (λεπτός) is an ancient Greek word meaning “thin, light, refine, fine-grained.” To me, a classicist and not a dog owner, it evokes the lightweight reactive system that powers the framework. I've since learned the same word is at the root of the medical term “leptospirosis,” a blood infection that affects humans and animals... My bad. No dogs were harmed in the creation of this framework.
### Is it production ready?

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@@ -1,7 +0,0 @@
[tasks.check]
alias = "check-all"
[tasks.check-all]
command = "cargo"
args = ["+nightly", "check-all-features"]
install_crate = "cargo-all-features"

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@@ -1,11 +0,0 @@
[tasks.lint]
dependencies = ["check-format-flow", "clippy-each-feature"]
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../" }
args = ["fmt", "--", "--check", "--config-path", "${LEPTOS_PROJECT_DIRECTORY}"]
[tasks.clippy-each-feature]
dependencies = ["install-clippy"]
command = "cargo"
args = ["hack", "clippy", "--all", "--each-feature", "--no-dev-deps"]

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@@ -1,15 +0,0 @@
extend = [
{ path = "./check.toml" },
{ path = "./lint.toml" },
{ path = "./test.toml" },
]
[env]
RUSTFLAGS = ""
LEPTOS_OUTPUT_NAME = "ci" # allows examples to check/build without cargo-leptos
[env.github-actions]
RUSTFLAGS = "-D warnings"
[tasks.ci]
dependencies = ["lint", "test"]

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@@ -1,7 +0,0 @@
[tasks.test]
alias = "test-all"
[tasks.test-all]
command = "cargo"
args = ["+nightly", "test-all-features"]
install_crate = "cargo-all-features"

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@@ -1,2 +0,0 @@
[output.html.playground]
runnable = false

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@@ -14,40 +14,31 @@ If you dont already have it installed, you can install Trunk by running
cargo install trunk
```
Create a basic Rust project
Create a basic Rust binary project
```bash
cargo init leptos-tutorial
```
`cd` into your new `leptos-tutorial` project and add `leptos` as a dependency
```bash
cargo add leptos --features=csr,nightly
```
Or you can leave off `nighly` if you're using stable Rust
```bash
cargo add leptos --features=csr
```
> Using `nightly` Rust, and the `nightly` feature in Leptos enables the function-call syntax for signal getters and setters that is used in most of this book.
>
> To use `nightly` Rust, you can run
> We recommend using `nightly` Rust, as it enables [a few nice features](https://github.com/leptos-rs/leptos#nightly-note). To use `nightly` Rust with WebAssembly, you can run
>
> ```bash
> rustup toolchain install nightly
> rustup default nightly
> ```
>
> If youd rather use stable Rust with Leptos, you can do that too. In the guide and examples, youll just use the [`ReadSignal::get()`](https://docs.rs/leptos/latest/leptos/struct.ReadSignal.html#impl-SignalGet%3CT%3E-for-ReadSignal%3CT%3E) and [`WriteSignal::set()`](https://docs.rs/leptos/latest/leptos/struct.WriteSignal.html#impl-SignalGet%3CT%3E-for-ReadSignal%3CT%3E) methods instead of calling signal getters and setters as functions.
Make sure you've added the `wasm32-unknown-unknown` target so that Rust can compile your code to WebAssembly to run in the browser.
Make sure you've added the `wasm32-unknown-unknown` target do that Rust can compile your code to WebAssembly to run in the browser.
```bash
rustup target add wasm32-unknown-unknown
```
`cd` into your new `leptos-tutorial` project and add `leptos` as a dependency
```bash
cargo add leptos --features=csr,nightly # or just csr if you're using stable Rust
```
Create a simple `index.html` in the root of the `leptos-tutorial` directory
```html

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@@ -0,0 +1 @@
# Responding to Changes with create_effect

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@@ -136,7 +136,7 @@ view! { cx,
In this example, clicking the button will cause the text inside `<p>` to be updated, cloning `state.name` again! Because signals are the atomic unit of reactivity, updating any field of the signal triggers updates to everything that depends on the signal.
Theres a better way. You can take fine-grained, reactive slices by using [`create_memo`](https://docs.rs/leptos/latest/leptos/fn.create_memo.html) or [`create_slice`](https://docs.rs/leptos/latest/leptos/fn.create_slice.html) (which uses `create_memo` but also provides a setter). “Memoizing” a value means creating a new reactive value which will only update when it changes. “Memoizing a slice” means creating a new reactive value which will only update when some field of the state struct updates.
Theres a better way. You can use take fine-grained, reactive slices by using [`create_memo`](https://docs.rs/leptos/latest/leptos/fn.create_memo.html) or [`create_slice`](https://docs.rs/leptos/latest/leptos/fn.create_slice.html) (which uses `create_memo` but also provides a setter). “Memoizing” a value means creating a new reactive value which will only update when it changes. “Memoizing a slice” means creating a new reactive value which will only update when some field of the state struct updates.
Here, instead of reading from the state signal directly, we create “slices” of that state with fine-grained updates via `create_slice`. Each slice signal only updates when the particular piece of the larger struct it accesses updates. This means you can create a single root signal, and then take independent, fine-grained slices of it in different components, each of which can update without notifying the others of changes.
@@ -183,222 +183,3 @@ data flow and of fine-grained reactive updates.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/1-basic-component-forked-8bte19?selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D&file=%2Fsrc%2Fmain.rs)
<iframe src="https://codesandbox.io/p/sandbox/1-basic-component-forked-8bte19?selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D&file=%2Fsrc%2Fmain.rs" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
// So far, we've only been working with local state in components
// We've only seen how to communicate between parent and child components
// But there are also more general ways to manage global state
//
// The three best approaches to global state are
// 1. Using the router to drive global state via the URL
// 2. Passing signals through context
// 3. Creating a global state struct and creating lenses into it with `create_slice`
//
// Option #1: URL as Global State
// The next few sections of the tutorial will be about the router.
// So for now, we'll just look at options #2 and #3.
// Option #2: Pass Signals through Context
//
// In virtual DOM libraries like React, using the Context API to manage global
// state is a bad idea: because the entire app exists in a tree, changing
// some value provided high up in the tree can cause the whole app to render.
//
// In fine-grained reactive libraries like Leptos, this is simply not the case.
// You can create a signal in the root of your app and pass it down to other
// 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 {
// here we create a signal in the root that can be consumed
// anywhere in the app.
let (count, set_count) = create_signal(cx, 0);
// we'll pass the setter to specific components,
// but provide the count itself to the whole app via context
provide_context(cx, count);
view! { cx,
<h1>"Option 2: Passing Signals"</h1>
// SetterButton is allowed to modify the count
<SetterButton set_count/>
// These consumers can only read from it
// But we could give them write access by passing `set_count` if we wanted
<div style="display: flex">
<FancyMath/>
<ListItems/>
</div>
}
}
/// A button that increments our global counter.
#[component]
fn SetterButton(cx: Scope, set_count: WriteSignal<u32>) -> impl IntoView {
view! { cx,
<div class="provider red">
<button on:click=move |_| set_count.update(|count| *count += 1)>
"Increment Global Count"
</button>
</div>
}
}
/// A component that does some "fancy" math with the global count
#[component]
fn FancyMath(cx: Scope) -> impl IntoView {
// here we consume the global count signal with `use_context`
let count = use_context::<ReadSignal<u32>>(cx)
// 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,
<div class="consumer blue">
"The number "
<strong>{count}</strong>
{move || if is_even() {
" is"
} else {
" is not"
}}
" even."
</div>
}
}
/// A component that shows a list of items generated from the global count.
#[component]
fn ListItems(cx: Scope) -> 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 squares = move || {
(0..count())
.map(|n| view! { cx, <li>{n}<sup>"2"</sup> " is " {n * n}</li> })
.collect::<Vec<_>>()
};
view! { cx,
<div class="consumer green">
<ul>{squares}</ul>
</div>
}
}
// Option #3: Create a Global State Struct
//
// You can use this approach to build a single global data structure
// that holds the state for your whole app, and then access it by
// taking fine-grained slices using `create_slice` or `create_memo`,
// so that changing one part of the state doesn't cause parts of your
// app that depend on other parts of the state to change.
#[derive(Default, Clone, Debug)]
struct GlobalState {
count: u32,
name: String,
}
#[component]
fn Option3(cx: Scope) -> 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);
view! { cx,
<h1>"Option 3: Passing Signals"</h1>
<div class="red consumer" style="width: 100%">
<h2>"Current Global State"</h2>
<pre>
{move || {
format!("{:#?}", state.get())
}}
</pre>
</div>
<div style="display: flex">
<GlobalStateCounter/>
<GlobalStateInput/>
</div>
}
}
/// 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");
// `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
|state| state.count,
// our setter describes how to mutate that slice, given a new value
|state, n| state.count = n,
);
view! { cx,
<div class="consumer blue">
<button
on:click=move |_| {
set_count(count() + 1);
}
>
"Increment Global Count"
</button>
<br/>
<span>"Count is: " {count}</span>
</div>
}
}
/// 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");
// 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
|state| state.name.clone(),
// our setter describes how to mutate that slice, given a new value
|state, n| state.name = n,
);
view! { cx,
<div class="consumer green">
<input
type="text"
prop:value=name
on:input=move |ev| {
set_name(event_target_value(&ev));
}
/>
<br/>
<span>"Name is: " {name}</span>
</div>
}
}
// This `main` function is the entry point into the app
// It just mounts our component to the <body>
// 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/> })
}
```
</details>
</preview>

View File

@@ -23,6 +23,7 @@
- [Transition](./async/12_transition.md)
- [Actions](./async/13_actions.md)
- [Interlude: Projecting Children](./interlude_projecting_children.md)
- [Responding to Changes with `create_effect`](./14_create_effect.md)
- [Global State Management](./15_global_state.md)
- [Router](./router/README.md)
- [Defining `<Routes/>`](./router/16_routes.md)

View File

@@ -53,89 +53,3 @@ Resources also provide a `refetch()` method that allows you to manually reload t
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/10-async-resources-4z0qt3?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/10-async-resources-4z0qt3?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use gloo_timers::future::TimeoutFuture;
use leptos::*;
// Here we define an async function
// This could be anything: a network request, database read, etc.
// Here, we just multiply a number by 10
async fn load_data(value: i32) -> i32 {
// fake a one-second delay
TimeoutFuture::new(1_000).await;
value * 10
}
#[component]
fn App(cx: Scope) -> impl IntoView {
// this count is our synchronous, local state
let (count, set_count) = create_signal(cx, 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
// it takes the source signal's value as its argument
// and does some async work
|value| async move { load_data(value).await },
);
// whenever the source signal changes, the loader reloads
// 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 });
// 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)
.map(|value| format!("Server returned {value:?}"))
// This loading state will only show before the first load
.unwrap_or_else(|| "Loading...".into())
};
// the resource's loading() method gives us a
// signal to indicate whether it's currently loading
let loading = async_data.loading();
let is_loading = move || if loading() { "Loading..." } else { "Idle." };
view! { cx,
<button
on:click=move |_| {
set_count.update(|n| *n += 1);
}
>
"Click me"
</button>
<p>
<code>"stable"</code>": " {move || stable.read(cx)}
</p>
<p>
<code>"count"</code>": " {count}
</p>
<p>
<code>"async_value"</code>": "
{async_result}
<br/>
{is_loading}
</p>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -72,58 +72,3 @@ This inversion of the flow of control makes it easier to add or remove individua
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/11-suspense-907niv?file=%2Fsrc%2Fmain.rs)
<iframe src="https://codesandbox.io/p/sandbox/11-suspense-907niv?file=%2Fsrc%2Fmain.rs" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use gloo_timers::future::TimeoutFuture;
use leptos::*;
async fn important_api_call(name: String) -> String {
TimeoutFuture::new(1_000).await;
name.to_ascii_uppercase()
}
#[component]
fn App(cx: Scope) -> impl IntoView {
let (name, set_name) = create_signal(cx, "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,
<input
on:input=move |ev| {
set_name(event_target_value(&ev));
}
prop:value=name
/>
<p><code>"name:"</code> {name}</p>
<Suspense
// the fallback will show whenever a resource
// read "under" the suspense is loading
fallback=move || view! { cx, <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)}
</p>
</Suspense>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -9,76 +9,3 @@ This example shows how you can create a simple tabbed contact list with `<Transi
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/12-transition-sn38sd?selection=%5B%7B%22endColumn%22%3A15%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A15%2C%22startLineNumber%22%3A2%7D%5D&file=%2Fsrc%2Fmain.rs)
<iframe src="https://codesandbox.io/p/sandbox/12-transition-sn38sd?selection=%5B%7B%22endColumn%22%3A15%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A15%2C%22startLineNumber%22%3A2%7D%5D&file=%2Fsrc%2Fmain.rs" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use gloo_timers::future::TimeoutFuture;
use leptos::*;
async fn important_api_call(id: usize) -> String {
TimeoutFuture::new(1_000).await;
match id {
0 => "Alice",
1 => "Bob",
2 => "Carol",
_ => "User not found",
}
.to_string()
}
#[component]
fn App(cx: Scope) -> impl IntoView {
let (tab, set_tab) = create_signal(cx, 0);
// this will reload every time `tab` changes
let user_data = create_resource(cx, tab, |tab| async move { important_api_call(tab).await });
view! { cx,
<div class="buttons">
<button
on:click=move |_| set_tab(0)
class:selected=move || tab() == 0
>
"Tab A"
</button>
<button
on:click=move |_| set_tab(1)
class:selected=move || tab() == 1
>
"Tab B"
</button>
<button
on:click=move |_| set_tab(2)
class:selected=move || tab() == 2
>
"Tab C"
</button>
{move || if user_data.loading().get() {
"Loading..."
} else {
""
}}
</div>
<Transition
// the fallback will show initially
// on subsequent reloads, the current child will
// continue showing
fallback=move || view! { cx, <p>"Loading..."</p> }
>
<p>
{move || user_data.read(cx)}
</p>
</Transition>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -94,83 +94,3 @@ Now, theres a chance this all seems a little over-complicated, or maybe too r
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/10-async-resources-forked-hgpfp0?selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A4%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A4%7D%5D&file=%2Fsrc%2Fmain.rs)
<iframe src="https://codesandbox.io/p/sandbox/10-async-resources-forked-hgpfp0?selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A4%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A4%7D%5D&file=%2Fsrc%2Fmain.rs" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use gloo_timers::future::TimeoutFuture;
use leptos::{html::Input, *};
use uuid::Uuid;
// Here we define an async function
// This could be anything: a network request, database read, etc.
// Think of it as a mutation: some imperative async action you run,
// whereas a resource would be some async data you load
async fn add_todo(text: &str) -> Uuid {
_ = text;
// fake a one-second delay
TimeoutFuture::new(1_000).await;
// pretend this is a post ID or something
Uuid::new_v4()
}
#[component]
fn App(cx: Scope) -> 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| {
// 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
let input = input.to_owned();
async move { add_todo(&input).await }
});
// actions provide a bunch of synchronous, reactive variables
// that tell us different things about the state of the action
let submitted = add_todo.input();
let pending = add_todo.pending();
let todo_id = add_todo.value();
let input_ref = create_node_ref::<Input>(cx);
view! { cx,
<form
on:submit=move |ev| {
ev.prevent_default(); // don't reload the page...
let input = input_ref.get().expect("input to exist");
add_todo.dispatch(input.value());
}
>
<label>
"What do you need to do?"
<input type="text"
node_ref=input_ref
/>
</label>
<button type="submit">"Add Todo"</button>
</form>
<p>{move || pending().then(|| "Loading...")}</p>
<p>
"Submitted: "
<code>{move || format!("{:#?}", submitted())}</code>
</p>
<p>
"Pending: "
<code>{move || format!("{:#?}", pending())}</code>
</p>
<p>
"Todo ID: "
<code>{move || format!("{:#?}", todo_id())}</code>
</p>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -112,195 +112,3 @@ Every time `count` is updated, this effect wil rerun. This is what allows reacti
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/serene-thompson-40974n?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/serene-thompson-40974n?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::html::Input;
use leptos::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
// Just making a visible log here
// You can ignore this...
let log = create_rw_signal::<Vec<String>>(cx, vec![]);
let logged = move || log().join("\n");
provide_context(cx, log);
view! { cx,
<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);
// this will add the name to the log
// any time one of the source signals changes
create_effect(cx, move |_| {
log(
cx,
if use_last() {
format!("{} {}", first(), last())
} else {
first()
},
)
});
view! { cx,
<h1><code>"create_effect"</code> " Version"</h1>
<form>
<label>
"First Name"
<input type="text" name="first" prop:value=first
on:change=move |ev| set_first(event_target_value(&ev))
/>
</label>
<label>
"Last Name"
<input type="text" name="last" prop:value=last
on:change=move |ev| set_last(event_target_value(&ev))
/>
</label>
<label>
"Show Last Name"
<input type="checkbox" name="use_last" prop:checked=use_last
on:change=move |ev| set_use_last(event_target_checked(&ev))
/>
</label>
</form>
}
}
#[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);
let mut prev_name = String::new();
let on_change = move |_| {
log(cx, " listener");
let first = first.get().unwrap();
let last = last.get().unwrap();
let use_last = use_last.get().unwrap();
let this_one = if use_last.checked() {
format!("{} {}", first.value(), last.value())
} else {
first.value()
};
if this_one != prev_name {
log(cx, &this_one);
prev_name = this_one;
}
};
view! { cx,
<h1>"Manual Version"</h1>
<form on:change=on_change>
<label>
"First Name"
<input type="text" name="first"
node_ref=first
/>
</label>
<label>
"Last Name"
<input type="text" name="last"
node_ref=last
/>
</label>
<label>
"Show Last Name"
<input type="checkbox" name="use_last"
checked
node_ref=use_last
/>
</label>
</form>
}
}
#[component]
fn EffectVsDerivedSignal(cx: Scope) -> impl IntoView {
let (my_value, set_my_value) = create_signal(cx, String::new());
// Don't do this.
/*let (my_optional_value, set_optional_my_value) = create_signal(cx, Option::<String>::None);
create_effect(cx, move |_| {
if !my_value.get().is_empty() {
set_optional_my_value(Some(my_value.get()));
} else {
set_optional_my_value(None);
}
});*/
// Do this
let my_optional_value =
move || (!my_value.with(String::is_empty)).then(|| Some(my_value.get()));
view! { cx,
<input
prop:value=my_value
on:input= move |ev| set_my_value(event_target_value(&ev))
/>
<p>
<code>"my_optional_value"</code>
" is "
<code>
<Show
when=move || my_optional_value().is_some()
fallback=|cx| view! { cx, "None" }
>
"Some(\"" {my_optional_value().unwrap()} "\")"
</Show>
</code>
</p>
}
}
/*#[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>,
/// 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
fallback: F,
) -> impl IntoView
where
W: Fn() -> bool + 'static,
F: Fn(Scope) -> IV + 'static,
IV: IntoView,
{
let memoized_when = create_memo(cx, move |_| when());
move || match memoized_when.get() {
true => children(cx).into_view(cx),
false => fallback(cx).into_view(cx),
}
}*/
fn log(cx: Scope, msg: impl std::fmt::Display) {
let log = use_context::<RwSignal<Vec<String>>>(cx).unwrap();
log.update(|log| log.push(msg.to_string()));
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -68,7 +68,7 @@ pub fn SimpleCounter(cx: Scope) -> impl IntoView {
The `SimpleCounter` function itself runs once. The `value` signal is created once. The framework hands off the `increment` function to the browser as an event listener. When you click the button, the browser calls `increment`, which updates `value` via `set_value`. And that updates the single text node represented in our view by `{value}`.
Closures are key to reactivity. They provide the framework with the ability to rerun the smallest possible unit of your application in response to a change.
Closures are key to reactivity. They provide the framework with the ability to rerun the smallest possible unit of your application in responsive to a change.
So remember two things:

View File

@@ -24,7 +24,7 @@ use leptos_router::*;
Routing behavior is provided by the [`<Router/>`](https://docs.rs/leptos_router/latest/leptos_router/fn.Router.html) component. This should usually be somewhere near the root of your application, the rest of the app.
> You shouldnt try to use multiple `<Router/>`s in your app. Remember that the router drives global state: if you have multiple routers, which one decides what to do when the URL changes?
> You shouldnt try to use multiple `<Router/>`s in your app. Remember that the router drives global state: if you have multiple routers, which ones decides what to do when the URL changes?
Lets start with a simple `<App/>` component using the router:
@@ -87,17 +87,15 @@ The `view` is a function that takes a `Scope` and returns a 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="/" view=|cx| view! { cx, <Home/> }/>
<Route path="/users" view=|cx| view! { cx, <Users/> }/>
<Route path="/users/:id" view=|cx| view! { cx, <UserProfile/> }/>
<Route path="/*any" view=|cx| view! { cx, <NotFound/> }/>
</Routes>
```
> `view` takes a `Fn(Scope) -> impl IntoView`. If a component has no props, it is a function that takes `Scope` and returns `impl IntoView`, so it can be passed directly into the `view`. In this case, `view=Home` is just a shorthand for `|cx| view! { cx, <Home/> }`.
> The router scores each route to see how good a match it is, so you can define your routes in any order.
Now if you navigate to `/` or to `/users` youll get the home page or the `<Users/>`. If you go to `/users/3` or `/blahblah` youll get a user profile or your 404 page (`<NotFound/>`). On every navigation, the router determines which `<Route/>` should be matched, and therefore what content should be displayed where the `<Routes/>` component is defined.
Note that you can define your routes in any order. The router scores each route to see how good a match it is, rather than simply trying to match them top to bottom.
Simple enough?

View File

@@ -4,10 +4,10 @@ We just defined the following set of routes:
```rust
<Routes>
<Route path="/" view=Home/>
<Route path="/users" view=Users/>
<Route path="/users/:id" view=UserProfile/>
<Route path="/*any" view=NotFound/>
<Route path="/" view=|cx| view! { cx, <Home /> }/>
<Route path="/users" view=|cx| view! { cx, <Users /> }/>
<Route path="/users/:id" view=|cx| view! { cx, <UserProfile /> }/>
<Route path="/*any" view=|cx| view! { cx, <NotFound /> }/>
</Routes>
```
@@ -17,11 +17,11 @@ Well... you can!
```rust
<Routes>
<Route path="/" view=Home/>
<Route path="/users" view=Users>
<Route path=":id" view=UserProfile/>
<Route path="/" view=|cx| view! { cx, <Home /> }/>
<Route path="/users" view=|cx| view! { cx, <Users /> }>
<Route path=":id" view=|cx| view! { cx, <UserProfile /> }/>
</Route>
<Route path="/*any" view=NotFound/>
<Route path="/*any" view=|cx| view! { cx, <NotFound /> }/>
</Routes>
```
@@ -39,8 +39,8 @@ Lets look back at our practical example.
```rust
<Routes>
<Route path="/users" view=Users/>
<Route path="/users/:id" view=UserProfile/>
<Route path="/users" view=|cx| view! { cx, <Users /> }/>
<Route path="/users/:id" view=|cx| view! { cx, <UserProfile /> }/>
</Routes>
```
@@ -53,8 +53,8 @@ Lets say I use nested routes instead:
```rust
<Routes>
<Route path="/users" view=Users>
<Route path=":id" view=UserProfile/>
<Route path="/users" view=|cx| view! { cx, <Users /> }>
<Route path=":id" view=|cx| view! { cx, <UserProfile /> }/>
</Route>
</Routes>
```
@@ -68,9 +68,9 @@ I actually need to add a fallback route
```rust
<Routes>
<Route path="/users" view=Users>
<Route path=":id" view=UserProfile/>
<Route path="" view=NoUser/>
<Route path="/users" view=|cx| view! { cx, <Users /> }>
<Route path=":id" view=|cx| view! { cx, <UserProfile /> }/>
<Route path="" view=|cx| view! { cx, <NoUser /> }/>
</Route>
</Routes>
```
@@ -94,8 +94,8 @@ You can easily define this with nested routes
```rust
<Routes>
<Route path="/contacts" view=ContactList>
<Route path=":id" view=ContactInfo/>
<Route path="/contacts" view=|cx| view! { cx, <ContactList/> }>
<Route path=":id" view=|cx| view! { cx, <ContactInfo/> }/>
<Route path="" view=|cx| view! { cx,
<p>"Select a contact to view more info."</p>
}/>
@@ -107,11 +107,11 @@ You can go even deeper. Say you want to have tabs for each contacts address,
```rust
<Routes>
<Route path="/contacts" view=ContactList>
<Route path=":id" view=ContactInfo>
<Route path="" view=EmailAndPhone/>
<Route path="address" view=Address/>
<Route path="messages" view=Messages/>
<Route path="/contacts" view=|cx| view! { cx, <ContactList/> }>
<Route path=":id" view=|cx| view! { cx, <ContactInfo/> }>
<Route path="" view=|cx| view! { cx, <EmailAndPhone/> }/>
<Route path="address" view=|cx| view! { cx, <Address/> }/>
<Route path="messages" view=|cx| view! { cx, <Messages/> }/>
</Route>
<Route path="" view=|cx| view! { cx,
<p>"Select a contact to view more info."</p>
@@ -124,7 +124,7 @@ You can go even deeper. Say you want to have tabs for each contacts address,
## `<Outlet/>`
Parent routes do not automatically render their nested routes. After all, they are just components; they dont know exactly where they should render their children, and “just stick it at the end of the parent component” is not a great answer.
Parent routes do not automatically render their nested routes. After all, they are just components; they dont know exactly where they should render their children, and “just stick at at the end of the parent component” is not a great answer.
Instead, you tell a parent component where to render any nested components with an `<Outlet/>` component. The `<Outlet/>` simply renders one of two things:
@@ -170,118 +170,3 @@ In fact, in this case, we dont even need to rerender the `<Contact/>` compone
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
use leptos_router::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<Router>
<h1>"Contact App"</h1>
// this <nav> will show on every routes,
// because it's outside the <Routes/>
// note: we can just use normal <a> tags
// and the router will use client-side navigation
<nav>
<h2>"Navigation"</h2>
<a href="/">"Home"</a>
<a href="/contacts">"Contacts"</a>
</nav>
<main>
<Routes>
// / just has an un-nested "Home"
<Route path="/" view=|cx| view! { cx,
<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,
<div class="tab">
"(Contact Info)"
</div>
}/>
<Route path="conversations" view=|cx| view! { cx,
<div class="tab">
"(Conversations)"
</div>
}/>
</Route>
// if no id specified, fall back
<Route path="" view=|cx| view! { cx,
<div class="select-user">
"Select a user to view contact info."
</div>
}/>
</Route>
</Routes>
</main>
</Router>
}
}
#[component]
fn ContactList(cx: Scope) -> impl IntoView {
view! { cx,
<div class="contact-list">
// here's our contact list component itself
<div class="contact-list-contacts">
<h3>"Contacts"</h3>
<A href="alice">"Alice"</A>
<A href="bob">"Bob"</A>
<A href="steve">"Steve"</A>
</div>
// <Outlet/> will show the nested child route
// we can position this outlet wherever we want
// within the layout
<Outlet/>
</div>
}
}
#[component]
fn ContactInfo(cx: Scope) -> impl IntoView {
// we can access the :id param reactively with `use_params_map`
let params = use_params_map(cx);
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
// imagine we're loading data from an API here
let name = move || match id().as_str() {
"alice" => "Alice",
"bob" => "Bob",
"steve" => "Steve",
_ => "User not found.",
};
view! { cx,
<div class="contact-info">
<h4>{name}</h4>
<div class="tabs">
<A href="" exact=true>"Contact Info"</A>
<A href="conversations">"Conversations"</A>
</div>
// <Outlet/> here is the tabs that are nested
// underneath the /contacts/:id route
<Outlet/>
</div>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -36,14 +36,6 @@ struct ContactSearch {
```
> Note: The `Params` derive macro is located at `leptos::Params`, and the `Params` trait is at `leptos_router::Params`. If you avoid using glob imports like `use leptos::*;`, make sure youre importing the right one for the derive macro.
>
> If you are not using the `nightly` feature, you will get the error
>
> ```
> no function or associated item named `into_param` found for struct `std::string::String` in the current scope
> ```
>
> At the moment, supporting both `T: FromStr` and `Option<T>` for typed params requires a nightly feature. You can fix this by simply changing the struct to use `q: Option<String>` instead of `q: String`.
Now we can use them in a component. Imagine a URL that has both params and a query, like `/contacts/:id?q=Search`.
@@ -78,126 +70,10 @@ let id = move || {
This can get a little messy: deriving a signal that wraps an `Option<_>` or `Result<_>` can involve a couple steps. But its worth doing this for two reasons:
1. Its correct, i.e., it forces you to consider the cases, “What if the user doesnt pass a value for this query field? What if they pass an invalid value?”
2. Its performant. Specifically, when you navigate between different paths that match the same `<Route/>` with only params or the query changing, you can get fine-grained updates to different parts of your app without rerendering. For example, navigating between different contacts in our contact-list example does a targeted update to the name field (and eventually contact info) without needing to replace or rerender the wrapping `<Contact/>`. This is what fine-grained reactivity is for.
2. Its performant. Specifically, when you navigate between different paths that match the same `<Route/>` with only params or the query changing, you can get fine-grained updates to different parts of your app without rerendering. For example, navigating between different contacts in our contact-list example does a targeted update to the name field (and eventually contact info) without needing to replacing or rerender the wrapping `<Contact/>`. This is what fine-grained reactivity is for.
> This is the same example from the previous section. The router is such an integrated system that it makes sense to provide a single example highlighting multiple features, even if we havent explained them all yet.
> This is the same example from the previous section. The router is such an integrated system that it makes sense to provide a single example highlighting multiple features, even if we havent explain them all yet.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
use leptos_router::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<Router>
<h1>"Contact App"</h1>
// this <nav> will show on every routes,
// because it's outside the <Routes/>
// note: we can just use normal <a> tags
// and the router will use client-side navigation
<nav>
<h2>"Navigation"</h2>
<a href="/">"Home"</a>
<a href="/contacts">"Contacts"</a>
</nav>
<main>
<Routes>
// / just has an un-nested "Home"
<Route path="/" view=|cx| view! { cx,
<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,
<div class="tab">
"(Contact Info)"
</div>
}/>
<Route path="conversations" view=|cx| view! { cx,
<div class="tab">
"(Conversations)"
</div>
}/>
</Route>
// if no id specified, fall back
<Route path="" view=|cx| view! { cx,
<div class="select-user">
"Select a user to view contact info."
</div>
}/>
</Route>
</Routes>
</main>
</Router>
}
}
#[component]
fn ContactList(cx: Scope) -> impl IntoView {
view! { cx,
<div class="contact-list">
// here's our contact list component itself
<div class="contact-list-contacts">
<h3>"Contacts"</h3>
<A href="alice">"Alice"</A>
<A href="bob">"Bob"</A>
<A href="steve">"Steve"</A>
</div>
// <Outlet/> will show the nested child route
// we can position this outlet wherever we want
// within the layout
<Outlet/>
</div>
}
}
#[component]
fn ContactInfo(cx: Scope) -> impl IntoView {
// we can access the :id param reactively with `use_params_map`
let params = use_params_map(cx);
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
// imagine we're loading data from an API here
let name = move || match id().as_str() {
"alice" => "Alice",
"bob" => "Bob",
"steve" => "Steve",
_ => "User not found.",
};
view! { cx,
<div class="contact-info">
<h4>{name}</h4>
<div class="tabs">
<A href="" exact=true>"Contact Info"</A>
<A href="conversations">"Conversations"</A>
</div>
// <Outlet/> here is the tabs that are nested
// underneath the /contacts/:id route
<Outlet/>
</div>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -11,8 +11,6 @@ The router will bail out of handling an `<a>` click under a number of situations
In other words, the router will only try to do a client-side navigation when its pretty sure it can handle it, and it will upgrade every `<a>` element to get this special behavior.
> This also means that if you need to opt out of client-side routing, you can do so easily. For example, if you have a link to another page on the same domain, but which isnt part of your Leptos app, you can just use `<a rel="external">` to tell the router it isnt something it can handle.
The router also provides an [`<A>`](https://docs.rs/leptos_router/latest/leptos_router/fn.A.html) component, which does two additional things:
1. Correctly resolves relative nested routes. Relative routing with ordinary `<a>` tags can be tricky. For example, if you have a route like `/post/:id`, `<A href="1">` will generate the correct relative route, but `<a href="1">` likely will not (depending on where it appears in your view.) `<A/>` resolves routes relative to the path of the nested route within which it appears.
@@ -23,119 +21,3 @@ The router also provides an [`<A>`](https://docs.rs/leptos_router/latest/leptos_
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/16-router-fy4tjv?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
use leptos_router::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<Router>
<h1>"Contact App"</h1>
// this <nav> will show on every routes,
// because it's outside the <Routes/>
// note: we can just use normal <a> tags
// and the router will use client-side navigation
<nav>
<h2>"Navigation"</h2>
<a href="/">"Home"</a>
<a href="/contacts">"Contacts"</a>
</nav>
<main>
<Routes>
// / just has an un-nested "Home"
<Route path="/" view=|cx| view! { cx,
<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,
<div class="tab">
"(Contact Info)"
</div>
}/>
<Route path="conversations" view=|cx| view! { cx,
<div class="tab">
"(Conversations)"
</div>
}/>
</Route>
// if no id specified, fall back
<Route path="" view=|cx| view! { cx,
<div class="select-user">
"Select a user to view contact info."
</div>
}/>
</Route>
</Routes>
</main>
</Router>
}
}
#[component]
fn ContactList(cx: Scope) -> impl IntoView {
view! { cx,
<div class="contact-list">
// here's our contact list component itself
<div class="contact-list-contacts">
<h3>"Contacts"</h3>
<A href="alice">"Alice"</A>
<A href="bob">"Bob"</A>
<A href="steve">"Steve"</A>
</div>
// <Outlet/> will show the nested child route
// we can position this outlet wherever we want
// within the layout
<Outlet/>
</div>
}
}
#[component]
fn ContactInfo(cx: Scope) -> impl IntoView {
// we can access the :id param reactively with `use_params_map`
let params = use_params_map(cx);
let id = move || params.with(|params| params.get("id").cloned().unwrap_or_default());
// imagine we're loading data from an API here
let name = move || match id().as_str() {
"alice" => "Alice",
"bob" => "Bob",
"steve" => "Steve",
_ => "User not found.",
};
view! { cx,
<div class="contact-info">
<h4>{name}</h4>
<div class="tabs">
<A href="" exact=true>"Contact Info"</A>
<A href="conversations">"Conversations"</A>
</div>
// <Outlet/> here is the tabs that are nested
// underneath the /contacts/:id route
<Outlet/>
</div>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -1,12 +1,12 @@
# The `<Form/>` Component
Links and forms sometimes seem completely unrelated. But, in fact, they work in very similar ways.
Links and forms sometimes seem completely unrelated. But in fact, they work in very similar ways.
In plain HTML, there are three ways to navigate to another page:
1. An `<a>` element that links to another page: Navigates to the URL in its `href` attribute with the `GET` HTTP method.
2. A `<form method="GET">`: Navigates to the URL in its `action` attribute with the `GET` HTTP method and the form data from its inputs encoded in the URL query string.
3. A `<form method="POST">`: Navigates to the URL in its `action` attribute with the `POST` HTTP method and the form data from its inputs encoded in the body of the request.
1. An `<a>` element that links to another page. Navigates to the URL in its `href` attribute with the `GET` HTTP method.
2. A `<form method="GET">`. Navigates to the URL in its `action` attribute with the `GET` HTTP method and the form data from its inputs encoded in the URL query string.
3. A `<form method="POST">`. Navigates to the URL in its `action` attribute with the `POST` HTTP method and the form data from its inputs encoded in the body of the request.
Since we have a client-side router, we can do client-side link navigations without reloading the page, i.e., without a full round-trip to the server and back. It makes sense that we can do client-side form navigations in the same way.
@@ -65,117 +65,3 @@ Youll notice that this version drops the `Submit` button. Instead, we add an
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/16-router-forked-hrrt3h?file=%2Fsrc%2Fmain.rs)
<iframe src="https://codesandbox.io/p/sandbox/16-router-forked-hrrt3h?file=%2Fsrc%2Fmain.rs" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
use leptos_router::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<Router>
<h1><code>"<Form/>"</code></h1>
<main>
<Routes>
<Route path="" view=FormExample/>
</Routes>
</main>
</Router>
}
}
#[component]
pub fn FormExample(cx: Scope) -> impl IntoView {
// reactive access to URL query
let query = use_query_map(cx);
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,
// read out the URL query strings
<table>
<tr>
<td><code>"name"</code></td>
<td>{name}</td>
</tr>
<tr>
<td><code>"number"</code></td>
<td>{number}</td>
</tr>
<tr>
<td><code>"select"</code></td>
<td>{select}</td>
</tr>
</table>
// <Form/> will navigate whenever submitted
<h2>"Manual Submission"</h2>
<Form method="GET" action="">
// input names determine query string key
<input type="text" name="name" value=name/>
<input type="number" name="number" value=number/>
<select name="select">
// `selected` will set which starts as selected
<option selected=move || select() == "A">
"A"
</option>
<option selected=move || select() == "B">
"B"
</option>
<option selected=move || select() == "C">
"C"
</option>
</select>
// submitting should cause a client-side
// navigation, not a full reload
<input type="submit"/>
</Form>
// This <Form/> uses some JavaScript to submit
// on every input
<h2>"Automatic Submission"</h2>
<Form method="GET" action="">
<input
type="text"
name="name"
value=name
// this oninput attribute will cause the
// form to submit on every input to the field
oninput="this.form.requestSubmit()"
/>
<input
type="number"
name="number"
value=number
oninput="this.form.requestSubmit()"
/>
<select name="select"
onchange="this.form.requestSubmit()"
>
<option selected=move || select() == "A">
"A"
</option>
<option selected=move || select() == "B">
"B"
</option>
<option selected=move || select() == "C">
"C"
</option>
</select>
// submitting should cause a client-side
// navigation, not a full reload
<input type="submit"/>
</Form>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -113,7 +113,7 @@ Server functions are a cool technology, but its very important to remember. *
So far, everything Ive said is actually framework agnostic. (And in fact, the Leptos server function crate has been integrated into Dioxus as well!) Server functions are simply a way of defining a function-like RPC call that leans on Web standards like HTTP requests and URL encoding.
But in a way, they also provide the last missing primitive in our story so far. Because a server function is just a plain Rust async function, it integrates perfectly with the async Leptos primitives we discussed [earlier](https://leptos-rs.github.io/leptos/async/index.html). So you can easily integrate your server functions with the rest of your applications:
But in a way, they also provide the last missing primitive in our story so far. Because a server function is just a plain Rust async function, it integrates perfectly with the async Leptos primitives we discussed [earlier](../async/README.md). So you can easily integrate your server functions with the rest of your applications:
- Create **resources** that call the server function to load data from the server
- Read these resources under `<Suspense/>` or `<Transition/>` to enable streaming SSR and fallback states while data loads.

View File

@@ -6,9 +6,9 @@ The server functions we looked at in the last chapter showed how to run code on
We call Leptos a “full-stack” framework, but “full-stack” is always a misnomer (after all, it never means everything from the browser to your power company.) For us, “full stack” means that your Leptos app can run in the browser, and can run on the server, and can integrate the two, drawing together the unique features available in each; as weve seen in the book so far, a button click on the browser can drive a database read on the server, both written in the same Rust module. But Leptos itself doesnt provide the server (or the database, or the operating system, or the firmware, or the electrical cables...)
Instead, Leptos provides integrations for the two most popular Rust web server frameworks, Actix Web ([`leptos_actix`](https://docs.rs/leptos_actix/latest/leptos_actix/)) and Axum ([`leptos_axum`](https://docs.rs/leptos_axum/latest/leptos_axum/)). Weve built integrations with each servers router so that you can simply plug your Leptos app into an existing server with `.leptos_routes()`, and easily handle server function calls.
Instead, Leptos provides integrations for the two most popular Rust web server frameworks, Actix Web ([`leptos_actix`](https://docs.rs/leptos_actix/latest/leptos_actix/)) and Axum ([`leptos_axum`](https://docs.rs/leptos_actix/latest/leptos_axum/)). Weve built integrations with each servers router so that you can simply plug your Leptos app into an existing server with `.leptos_routes()`, and easily handle server function calls.
> If you havent seen our [Actix](https://github.com/leptos-rs/start) and [Axum](https://github.com/leptos-rs/start-axum) templates, nows a good time to check them out.
> If havent seen our [Actix](https://github.com/leptos-rs/start) and [Axum](https://github.com/leptos-rs/start-axum) templates, nows a good time to check them out.
## Using Extractors
@@ -43,7 +43,7 @@ pub async fn actix_extract(cx: Scope) -> Result<String, ServerFnError> {
## Axum Extractors
The syntax for the [`leptos_axum::extract`](https://docs.rs/leptos_axum/latest/leptos_axum/fn.extract.html) function is very similar. (**Note**: This is available on the git main branch, but has not been released as of writing.) Note that Axum extractors return a `Result`, so youll need to add something to handle the error case.
The syntax for the `leptos_axum::extract` function is very similar. (**Note**: This is available on the git main branch, but has not been released as of writing.) Note that Axum extractors return a `Result`, so youll need to add something to handle the error case.
```rust
#[server(AxumExtract, "/api")]

View File

@@ -8,12 +8,7 @@ If youve ever listened to streaming music or watched a video online, Im su
Let me say a little more about what I mean.
Leptos supports all four different modes of rendering HTML that includes asynchronous data:
1. [Synchronous Rendering](#synchronous-rendering)
1. [Async Rendering](#async-rendering)
1. [In-Order streaming](#in-order-streaming)
1. [Out-of-Order Streaming](#out-of-order-streaming)
Leptos supports all four different of these different ways to render HTML that includes asynchronous data.
## Synchronous Rendering
@@ -69,7 +64,7 @@ If youre using server-side rendering, the synchronous mode is almost never wh
5. **Partially-blocked streaming**: “Partially-blocked” streaming is useful when you have multiple separate `<Suspense/>` components on the page. If one of them reads from one or more “blocking resources” (see below), the fallback will not be sent; rather, the server will wait until that `<Suspense/>` has resolved and then replace the fallback with the resolved fragment on the server, which means that it is included in the initial HTML response and appears even if JavaScript is disabled or not supported. Other `<Suspense/>` stream in out of order as usual.
This is useful when you have multiple `<Suspense/>` on the page, and one is more important than the other: think of a blog post and comments, or product information and reviews. It is _not_ useful if theres only one `<Suspense/>`, or if every `<Suspense/>` reads from blocking resources. In those cases it is a slower form of `async` rendering.
This is useful when you have multiple `<Suspense/>` on the page, and one is more important than the other: think of a blog post and comments, or product information and reviews. It is *not* useful if theres only one `<Suspense/>`, or if every `<Suspense/>` reads from blocking resources. In those cases it is a slower form of `async` rendering.
- _Pros_: Works if JavaScript is disabled or not supported on the users device.
- _Cons_
@@ -84,13 +79,13 @@ Because it offers the best blend of performance characteristics, Leptos defaults
```rust
<Routes>
// Well load the home page with out-of-order streaming and <Suspense/>
<Route path="" view=HomePage
<Route path="" view=|cx| view! { cx, <HomePage/> }/>
// We'll load the posts with async rendering, so they can set
// the title and metadata *after* loading the data
<Route
path="/post/:id"
view=Post
view=|cx| view! { cx, <Post/> }
ssr=SsrMode::Async
/>
</Routes>

View File

@@ -74,11 +74,11 @@ In other words, if this is being compiled to WASM, it has three items; otherwise
When I load the page in the browser, I see nothing. If I open the console I see a bunch of warnings:
```
element with id 0-3 not found, ignoring it for hydration
element with id 0-4 not found, ignoring it for hydration
element with id 0-5 not found, ignoring it for hydration
component with id _0-6c not found, ignoring it for hydration
component with id _0-6o not found, ignoring it for hydration
element with id 0-0-1 not found, ignoring it for hydration
element with id 0-0-2 not found, ignoring it for hydration
element with id 0-0-3 not found, ignoring it for hydration
component with id _0-0-4c not found, ignoring it for hydration
component with id _0-0-4o not found, ignoring it for hydration
```
The WASM version of your app, running in the browser, expects to find three items; but the HTML has none.
@@ -87,56 +87,6 @@ The WASM version of your app, running in the browser, expects to find three item
Its pretty rare that you do this intentionally, but it could happen from somehow running different logic on the server and in the browser. If youre seeing warnings like this and you dont think its your fault, its much more likely that its a bug with `<Suspense/>` or something. Feel free to go ahead and open an [issue](https://github.com/leptos-rs/leptos/issues) or [discussion](https://github.com/leptos-rs/leptos/discussions) on GitHub for help.
### Mutating the DOM during rendering
This is a slightly more common way to create a client/server mismatch: updating a signal _during rendering_ in a way that mutates the view.
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let (loaded, set_loaded) = create_signal(cx, false);
// create_effect only runs on the client
create_effect(cx, move |_| {
// do something like reading from localStorage
set_loaded(true);
});
move || {
if loaded() {
view! { cx, <p>"Hello, world!"</p> }.into_any()
} else {
view! { cx, <div class="loading">"Loading..."</div> }.into_any()
}
}
}
```
This one gives us the scary panic
```
panicked at 'assertion failed: `(left == right)`
left: `"DIV"`,
right: `"P"`: SSR and CSR elements have the same hydration key but different node kinds.
```
And a handy link to this page!
The problem here is that `create_effect` runs **immediately** and **synchronously**, but only in the browser. As a result, on the server, `loaded` is false, and a `<div>` is rendered. But on the browser, by the time the view is being rendered, `loaded` has already been set to `true`, and the browser is expecting to find a `<p>`.
#### Solution
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 |_| {
// do something like reading from localStorage
request_animation_frame(move || set_loaded(true));
});
```
This allows the browser to hydrate with the correct, matching state (`loaded` is `false` when it reaches the view), then immediately update it to `true` once hydration is complete.
### Not all client code can run on the server
Imagine you happily import a dependency like `gloo-net` that youve been used to using to make requests in the browser, and use it in a `create_resource` in a server-rendered app.

View File

@@ -76,7 +76,7 @@ wasm-pack test --firefox
### Writing Your Tests
Most tests will involve some combination of vanilla DOM manipulation and comparison to a `view`. For example, heres a test [for the
`counter` example](https://github.com/leptos-rs/leptos/blob/main/examples/counter/tests/web.rs).
`counter` example](https://github.com/leptos-rs/leptos/blob/main/examples/counter/tests/mod.rs).
First, we set up the testing environment.

View File

@@ -139,7 +139,7 @@ view! { cx,
Remember—and this is _very important_—only functions are reactive. This means that
`{count}` and `{count()}` do very different things in your view. `{count}` passes
in a function, telling the framework to update the view every time `count` changes.
`{count()}` accesses the value of `count` once, and passes an `i32` into the view,
`{count()}` access the value of `count` once, and passes an `i32` into the view,
rendering it once, unreactively. You can see the difference in the CodeSandbox below!
Lets make one final change. `set_count(3)` is a pretty useless thing for a click handler to do. Lets replace “set this value to 3” with “increment this value by 1”:
@@ -160,67 +160,3 @@ Other Previews > 8080.` Hover over any of the variables to show Rust-Analyzer de
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/1-basic-component-3d74p3?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A31%2C%22endLineNumber%22%3A19%2C%22startColumn%22%3A31%2C%22startLineNumber%22%3A19%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/1-basic-component-3d74p3?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A31%2C%22endLineNumber%22%3A19%2C%22startColumn%22%3A31%2C%22startLineNumber%22%3A19%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
// The #[component] macro marks a function as a reusable component
// Components are the building blocks of your user interface
// They define a reusable unit of behavior
#[component]
fn App(cx: Scope) -> 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);
// the `view` macro is how we define the user interface
// it uses an HTML-like format that can accept certain Rust values
view! { cx,
<button
// on:click will run whenever the `click` event fires
// every event handler is defined as `on:{eventname}`
// we're able to move `set_count` into the closure
// because signals are Copy and 'static
on:click=move |_| {
set_count.update(|n| *n += 1);
}
>
// text nodes in RSX should be wrapped in quotes,
// like a normal Rust string
"Click me"
</button>
<p>
<strong>"Reactive: "</strong>
// you can insert Rust expressions as values in the DOM
// by wrapping them in curly braces
// if you pass in a function, it will reactively update
{move || count.get()}
</p>
<p>
<strong>"Reactive shorthand: "</strong>
// signals are functions, so we can remove the wrapping closure
{count}
</p>
<p>
<strong>"Not reactive: "</strong>
// NOTE: if you write {count()}, this will *not* be reactive
// it simply gets the value of count once
{count()}
</p>
}
}
// This `main` function is the entry point into the app
// It just mounts our component to the <body>
// 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/> })
}
```

View File

@@ -152,67 +152,3 @@ places in your application with minimal overhead.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/2-dynamic-attribute-pqyvzl?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/2-dynamic-attribute-pqyvzl?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>Code Sandbox Source</summary>
```rust
use leptos::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
let (count, set_count) = create_signal(cx, 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,
<button
on:click=move |_| {
set_count.update(|n| *n += 1);
}
// the class: syntax reactively updates a single class
// here, we'll set the `red` class when `count` is odd
class:red=move || count() % 2 == 1
>
"Click me"
</button>
// NOTE: self-closing tags like <br> need an explicit /
<br/>
// We'll update this progress bar every time `count` changes
<progress
// static attributes work as in HTML
max="50"
// passing a function to an attribute
// reactively sets that attribute
// signals are functions, so this <=> `move || count.get()`
value=count
>
</progress>
<br/>
// This progress bar will use `double_count`
// so it should move twice as fast!
<progress
max="50"
// derived signals are functions, so they can also
// reactive update the DOM
value=double_count
>
</progress>
<p>"Count: " {count}</p>
<p>"Double Count: " {double_count}</p>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -219,25 +219,9 @@ where
This is a perfectly reasonable way to write this component: `progress` now takes
any value that implements this `Fn()` trait.
This generic can also be specified inline:
```rust
#[component]
fn ProgressBar<F: Fn() -> i32 + 'static>(
cx: Scope,
#[prop(default = 100)] max: u16,
progress: F,
) -> impl IntoView {
view! { cx,
<progress
max=max
value=progress
/>
}
}
```
> Note that generic component props _cant_ be specified with an `impl` yet (`progress: impl Fn() -> i32 + 'static,`), in part because theyre actually used to generate a `struct ProgressBarProps`, and struct fields cannot be `impl` types. The `#[component]` macro may be further improved in the future to allow inline `impl` generic props.
> Note that generic component props _cannot_ be specified inline (as `<F: Fn() -> i32>`)
> or as `progress: impl Fn() -> i32 + 'static,`, in part because theyre actually used to generate
> a `struct ProgressBarProps`, and struct fields cannot be `impl` types.
### `into` Props
@@ -287,81 +271,6 @@ fn App(cx: Scope) -> impl IntoView {
}
```
### Optional Generic Props
Note that you cant specify optional generic props for a component. Lets see what would happen if you try:
```rust,compile_fail
#[component]
fn ProgressBar<F: Fn() -> i32 + 'static>(
cx: Scope,
#[prop(optional)] progress: Option<F>,
) -> impl IntoView {
progress.map(|progress| {
view! { cx,
<progress
max=100
value=progress
/>
}
})
}
#[component]
pub fn App(cx: Scope) -> impl IntoView {
view! { cx,
<ProgressBar/>
}
}
```
Rust helpfully gives the error
```
xx | <ProgressBar/>
| ^^^^^^^^^^^ cannot infer type of the type parameter `F` declared on the function `ProgressBar`
|
help: consider specifying the generic argument
|
xx | <ProgressBar::<F>/>
| +++++
```
There are just two problems:
1. Leptoss view macro doesnt support specifying a generic on a component with this turbofish syntax.
2. Even if you could, specifying the correct type here is not possible; closures and functions in general are unnameable types. The compiler can display them with a shorthand, but you cant specify them.
However, you can get around this by providing a concrete type using `Box<dyn _>` or `&dyn _`:
```rust
#[component]
fn ProgressBar(
cx: Scope,
#[prop(optional)] progress: Option<Box<dyn Fn() -> i32>>,
) -> impl IntoView {
progress.map(|progress| {
view! { cx,
<progress
max=100
value=progress
/>
}
})
}
#[component]
pub fn App(cx: Scope) -> impl IntoView {
view! { cx,
<ProgressBar/>
}
}
```
Because the Rust compiler now knows the concrete type of the prop, and therefore its size in memory even in the `None` case, this compiles fine.
> In this particular case, `&dyn Fn() -> i32` will cause lifetime issues, but in other cases, it may be a possibility.
## Documenting Components
This is one of the least essential but most important sections of this book.
@@ -400,77 +309,3 @@ and see the power of the `#[component]` macro combined with rust-analyzer here.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/3-components-50t2e7?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A7%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A7%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/3-components-50t2e7?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A7%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A7%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
// Composing different components together is how we build
// user interfaces. Here, we'll define a resuable <ProgressBar/>.
// You'll see how doc comments can be used to document components
// and their properties.
/// 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)]
/// The maximum value of the progress bar.
max: u16,
// Will run `.into()` on the value passed into the prop.
#[prop(into)]
// `Signal<T>` is a wrapper for several reactive types.
// It can be helpful in component APIs like this, where we
// might want to take any kind of reactive value
/// How much progress should be displayed.
progress: Signal<i32>,
) -> impl IntoView {
view! { cx,
<progress
max={max}
value=progress
/>
<br/>
}
}
#[component]
fn App(cx: Scope) -> impl IntoView {
let (count, set_count) = create_signal(cx, 0);
let double_count = move || count() * 2;
view! { cx,
<button
on:click=move |_| {
set_count.update(|n| *n += 1);
}
>
"Click me"
</button>
<br/>
// If you have this open in CodeSandbox or an editor with
// rust-analyzer support, try hovering over `ProgressBar`,
// `max`, or `progress` to see the docs we defined above
<ProgressBar max=50 progress=count/>
// Let's use the default max value on this one
// the default is 100, so it should move half as fast
<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)/>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -106,162 +106,3 @@ Check out the `<DynamicList/>` component below for an example.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/4-iteration-sglt1o?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A6%2C%22endLineNumber%22%3A55%2C%22startColumn%22%3A5%2C%22startLineNumber%22%3A31%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/4-iteration-sglt1o?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A6%2C%22endLineNumber%22%3A55%2C%22startColumn%22%3A5%2C%22startLineNumber%22%3A31%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
// Iteration is a very common task in most applications.
// So how do you take a list of data and render it in the DOM?
// This example will show you the two ways:
// 1) for mostly-static lists, using Rust iterators
// 2) for lists that grow, shrink, or move items, using <For/>
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<h1>"Iteration"</h1>
<h2>"Static List"</h2>
<p>"Use this pattern if the list itself is static."</p>
<StaticList length=5/>
<h2>"Dynamic List"</h2>
<p>"Use this pattern if the rows in your list will change."</p>
<DynamicList initial_length=5/>
}
}
/// A list of counters, without the ability
/// 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));
// 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,
<li>
<button
on:click=move |_| set_count.update(|n| *n += 1)
>
{count}
</button>
</li>
}
})
.collect::<Vec<_>>();
// 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,
<ul>{counter_buttons}</ul>
}
}
/// A list of counters that allows you to add or
/// remove counters.
#[component]
fn DynamicList(
cx: Scope,
/// The number of counters to begin with.
initial_length: usize,
) -> impl IntoView {
// This dynamic list will use the <For/> component.
// <For/> is a keyed list. This means that each row
// has a defined key. If the key does not change, the row
// will not be re-rendered. When the list changes, only
// the minimum number of changes will be made to the DOM.
// `next_counter_id` will let us generate unique IDs
// we do this by simply incrementing the ID by one
// each time we create a counter
let mut next_counter_id = initial_length;
// 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)))
.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 add_counter = move |_| {
// create a signal for the new counter
let sig = create_signal(cx, next_counter_id + 1);
// add this counter to the list of counters
set_counters.update(move |counters| {
// since `.update()` gives us `&mut T`
// we can just use normal Vec methods like `push`
counters.push((next_counter_id, sig))
});
// increment the ID so it's always unique
next_counter_id += 1;
};
view! { cx,
<div>
<button on:click=add_counter>
"Add Counter"
</button>
<ul>
// The <For/> component is central here
// This allows for efficient, key list rendering
<For
// `each` takes any function that returns an iterator
// this should usually be a signal or derived signal
// if it's not reactive, just render a Vec<_> instead of <For/>
each=counters
// the key should be unique and stable for each row
// using an index is usually a bad idea, unless your list
// can only grow, because moving items around inside the list
// means their indices will change and they will all rerender
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,
<li>
<button
on:click=move |_| set_count.update(|n| *n += 1)
>
{count}
</button>
<button
on:click=move |_| {
set_counters.update(|counters| {
counters.retain(|(counter_id, _)| counter_id != &id)
});
}
>
"Remove"
</button>
</li>
}
}
/>
</ul>
</div>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -112,112 +112,3 @@ The view should be pretty self-explanatory by now. Note two things:
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/5-form-inputs-ih9m62?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A12%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A12%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/5-form-inputs-ih9m62?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A12%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A12%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::{ev::SubmitEvent, *};
#[component]
fn App(cx: Scope) -> impl IntoView {
view! { cx,
<h2>"Controlled Component"</h2>
<ControlledComponent/>
<h2>"Uncontrolled Component"</h2>
<UncontrolledComponent/>
}
}
#[component]
fn ControlledComponent(cx: Scope) -> impl IntoView {
// create a signal to hold the value
let (name, set_name) = create_signal(cx, "Controlled".to_string());
view! { cx,
<input type="text"
// fire an event whenever the input changes
on:input=move |ev| {
// event_target_value is a Leptos helper function
// it functions the same way as event.target.value
// in JavaScript, but smooths out some of the typecasting
// necessary to make this work in Rust
set_name(event_target_value(&ev));
}
// the `prop:` syntax lets you update a DOM property,
// rather than an attribute.
//
// IMPORTANT: the `value` *attribute* only sets the
// initial value, until you have made a change.
// The `value` *property* sets the current value.
// This is a quirk of the DOM; I didn't invent it.
// Other frameworks gloss this over; I think it's
// more important to give you access to the browser
// as it really works.
//
// tl;dr: use prop:value for form inputs
prop:value=name
/>
<p>"Name is: " {name}</p>
}
}
#[component]
fn UncontrolledComponent(cx: Scope) -> impl IntoView {
// import the type for <input>
use leptos::html::Input;
let (name, set_name) = create_signal(cx, "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);
// fires when the form `submit` event happens
// this will store the value of the <input> in our signal
let on_submit = move |ev: SubmitEvent| {
// stop the page from reloading!
ev.prevent_default();
// here, we'll extract the value from the input
let value = input_element()
// event handlers can only fire after the view
// is mounted to the DOM, so the `NodeRef` will be `Some`
.expect("<input> to exist")
// `NodeRef` implements `Deref` for the DOM element type
// this means we can call`HtmlInputElement::value()`
// to get the current value of the input
.value();
set_name(value);
};
view! { cx,
<form on:submit=on_submit>
<input type="text"
// here, we use the `value` *attribute* to set only
// the initial value, letting the browser maintain
// the state after that
value=name
// store a reference to this input in `input_element`
node_ref=input_element
/>
<input type="submit" value="Submit"/>
</form>
<p>"Name is: " {name}</p>
}
}
// This `main` function is the entry point into the app
// It just mounts our component to the <body>
// 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/> })
}
```
</details>
</preview>

View File

@@ -285,100 +285,3 @@ view! { cx,
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/6-control-flow-in-view-zttwfx?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/6-control-flow-in-view-zttwfx?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
let (value, set_value) = create_signal(cx, 0);
let is_odd = move || value() & 1 == 1;
let odd_text = move || if is_odd() { Some("How odd!") } else { None };
view! { cx,
<h1>"Control Flow"</h1>
// Simple UI to update and show a value
<button on:click=move |_| set_value.update(|n| *n += 1)>
"+1"
</button>
<p>"Value is: " {value}</p>
<hr/>
<h2><code>"Option<T>"</code></h2>
// For any `T` that implements `IntoView`,
// so does `Option<T>`
<p>{odd_text}</p>
// This means you can use `Option` methods on it
<p>{move || odd_text().map(|text| text.len())}</p>
<h2>"Conditional Logic"</h2>
// You can do dynamic conditional if-then-else
// logic in several ways
//
// a. An "if" expression in a function
// This will simply re-render every time the value
// changes, which makes it good for lightweight UI
<p>
{move || if is_odd() {
"Odd"
} else {
"Even"
}}
</p>
// b. Toggling some kind of class
// This is smart for an element that's going to
// toggled often, because it doesn't destroy
// it in between states
// (you can find the `hidden` class in `index.html`)
<p class:hidden=is_odd>"Appears if even."</p>
// c. The <Show/> component
// This only renders the fallback and the child
// once, lazily, and toggles between them when
// 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> }
>
<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> })}
<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)
{move || match is_odd() {
true if value() == 1 => {
// <pre> returns HtmlElement<Pre>
view! { cx, <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! { cx, <textarea>{value()}</textarea> }.into_any()
}}
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -113,64 +113,3 @@ an `<ErrorBoundary/>` will appear again.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/7-error-handling-and-error-boundaries-sroncx?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/7-error-handling-and-error-boundaries-sroncx?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A2%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A2%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
#[component]
fn App(cx: Scope) -> impl IntoView {
let (value, set_value) = create_signal(cx, 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,
<h1>"Error Handling"</h1>
<label>
"Type a number (or something that's not a number!)"
<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,
<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::<Vec<_>>()
}
</ul>
</div>
}
>
<p>
"You entered "
// because `value` is `Result<i32, _>`,
// it will render the `i32` if it is `Ok`,
// and render nothing and trigger the error boundary
// if it is `Err`. It's a signal, so this will dynamically
// update when `value` changes
<strong>{value}</strong>
</p>
</ErrorBoundary>
</label>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -288,150 +288,3 @@ signals and effects, all the way down.
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/8-parent-child-communication-84we8m?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/8-parent-child-communication-84we8m?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A3%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A3%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::{ev::MouseEvent, *};
// This highlights four different ways that child components can communicate
// with their parent:
// 1) <ButtonA/>: passing a WriteSignal as one of the child component props,
// for the child component to write into and the parent to read
// 2) <ButtonB/>: passing a closure as one of the child component props, for
// the child component to call
// 3) <ButtonC/>: adding an `on:` event listener to a component
// 4) <ButtonD/>: providing a context that is used in the component (rather than prop drilling)
#[derive(Copy, Clone)]
struct SmallcapsContext(WriteSignal<bool>);
#[component]
pub fn App(cx: Scope) -> 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);
// 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));
view! {
cx,
<main>
<p
// class: attributes take F: Fn() => bool, and these signals all implement Fn()
class:red=red
class:right=right
class:italics=italics
class:smallcaps=smallcaps
>
"Lorem ipsum sit dolor amet."
</p>
// Button A: pass the signal setter
<ButtonA setter=set_red/>
// Button B: pass a closure
<ButtonB on_click=move |_| set_right.update(|value| *value = !*value)/>
// Button B: use a regular event listener
// setting an event listener on a component like this applies it
// to each of the top-level elements the component returns
<ButtonC on:click=move |_| set_italics.update(|value| *value = !*value)/>
// Button D gets its setter from context rather than props
<ButtonD/>
</main>
}
}
/// 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)
>
"Toggle Red"
</button>
}
}
/// 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
where
F: Fn(MouseEvent) + 'static,
{
view! {
cx,
<button
on:click=on_click
>
"Toggle Right"
</button>
}
// just a note: in an ordinary function ButtonB could take on_click: impl Fn(MouseEvent) + 'static
// and save you from typing out the generic
// the component macro actually expands to define a
//
// struct ButtonBProps<F> where F: Fn(MouseEvent) + 'static {
// on_click: F
// }
//
// this is what allows us to have named props in our component invocation,
// instead of an ordered list of function arguments
// if Rust ever had named function arguments we could drop this requirement
}
/// 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 {
view! {
cx,
<button>
"Toggle Italics"
</button>
}
}
/// 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;
view! {
cx,
<button
on:click=move |_| setter.update(|value| *value = !*value)
>
"Toggle Small Caps"
</button>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -115,118 +115,14 @@ Calling it like this will create a list:
```rust
view! { cx,
<WrapsChildren>
<WrappedChildren>
"A"
"B"
"C"
</WrapsChildren>
</WrappedChildren>
}
```
[Click to open CodeSandbox.](https://codesandbox.io/p/sandbox/9-component-children-2wrdfd?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A12%2C%22endLineNumber%22%3A19%2C%22startColumn%22%3A12%2C%22startLineNumber%22%3A19%7D%5D)
<iframe src="https://codesandbox.io/p/sandbox/9-component-children-2wrdfd?file=%2Fsrc%2Fmain.rs&selection=%5B%7B%22endColumn%22%3A12%2C%22endLineNumber%22%3A19%2C%22startColumn%22%3A12%2C%22startLineNumber%22%3A19%7D%5D" width="100%" height="1000px" style="max-height: 100vh"></iframe>
<details>
<summary>CodeSandbox Source</summary>
```rust
use leptos::*;
// Often, you want to pass some kind of child view to another
// component. There are two basic patterns for doing this:
// - "render props": creating a component prop that takes a function
// that creates a view
// - the `children` prop: a special property that contains content
// passed as the children of a component in your view, not as a
// property
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let (items, set_items) = create_signal(cx, 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,
<p>"Length: " {len}</p>
}
};
view! { cx,
// This component just displays the two kinds of children,
// embedding them in some other markup
<TakesChildren
// for component props, you can shorthand
// `render_prop=render_prop` => `render_prop`
// (this doesn't work for HTML element attributes)
render_prop
>
// these look just like the children of an HTML element
<p>"Here's a child."</p>
<p>"Here's another child."</p>
</TakesChildren>
<hr/>
// This component actually iterates over and wraps the children
<WrapsChildren>
<p>"Here's a child."</p>
<p>"Here's another child."</p>
</WrapsChildren>
}
}
/// 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>`
/// ... aren't you glad we named it `Children` instead?
children: Children,
) -> impl IntoView
where
F: Fn() -> IV,
IV: IntoView,
{
view! { cx,
<h1><code>"<TakesChildren/>"</code></h1>
<h2>"Render Prop"</h2>
{render_prop()}
<hr/>
<h2>"Children"</h2>
{children(cx)}
}
}
/// 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
// `nodes` field that contains a Vec<View>
// this means we can iterate over the children
// to create something new!
let children = children(cx)
.nodes
.into_iter()
.map(|child| view! { cx, <li>{child}</li> })
.collect::<Vec<_>>();
view! { cx,
<h1><code>"<WrapsChildren/>"</code></h1>
// wrap our wrapped children in a UL
<ul>{children}</ul>
}
}
fn main() {
leptos::mount_to_body(|cx| view! { cx, <App/> })
}
```
</details>
</preview>

View File

@@ -5,12 +5,10 @@ CARGO_MAKE_EXTEND_WORKSPACE_MAKEFILE = true
CARGO_MAKE_CARGO_BUILD_TEST_FLAGS = ""
CARGO_MAKE_WORKSPACE_EMULATION = true
CARGO_MAKE_CRATE_WORKSPACE_MEMBERS = [
"animated_show",
"counter",
"counter_isomorphic",
"counters",
"counters_stable",
"counter_url_query,
"counter_without_macros",
"error_boundary",
"errors_axum",
@@ -47,75 +45,3 @@ grep -v gtk |
jq -R -s -c 'split("\n")[:-1]')
echo "CARGO_MAKE_CRATE_WORKSPACE_MEMBERS = $examples"
'''
[tasks.test-info]
workspace = false
description = "report ci test runners for each example - Option [all]"
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"
ITALIC="\e[3m"
YELLOW="\e[0;33m"
RESET="\e[0m"
echo
echo "${YELLOW}CI test runners by example...${RESET}"
echo
examples=$(ls |
grep -v README.md |
grep -v Makefile.toml |
grep -v cargo-make |
grep -v gtk |
sort -u |
awk '{print $0 ", "}')
example_root_dir=$(pwd)
for example_dir in $examples
do
clean_name=$(echo $example_dir | sed 's%,%%')
cd $clean_name
c_tests=$(grep -rl --fixed-strings "#[test]" | wc -l)
rs_tests=$(grep -rl --fixed-strings "#[rstest]" | wc -l)
w_configs=$(grep -rl "\/wasm-test.toml\"" | wc -l)
pw_configs=$(grep -rl "\/playwright-test.toml\"" | wc -l)
cl_configs=$(grep -rl "\/cargo-leptos-test.toml\"" | wc -l)
test_runner=
if [ $c_tests -gt 0 ]; then
test_runner="-C"
fi
if [ $rs_tests -gt 0 ]; then
test_runner=$test_runner"-R"
fi
if [ $w_configs -gt 0 ]; then
test_runner=$test_runner"-W"
fi
if [ $pw_configs -gt 0 ]; then
test_runner=$test_runner"-P"
fi
if [ $cl_configs -gt 0 ]; then
test_runner=$test_runner"-L"
fi
if [ ! -z "$1" ]; then
# Show all examples
echo "$clean_name ${BOLD}${test_runner}${RESET}"
elif [ ! -z $test_runner ]; then
# Filter out examples that do not run tests in `ci`
echo "$clean_name ${BOLD}${test_runner}${RESET}"
fi
cd $example_root_dir
done
echo
echo "${ITALIC}Test Runners: C = Cargo Test, L = Cargo Leptos Test, P = Playwright Test, R = RS Test, W = WASM Test${RESET}"
echo
'''

View File

@@ -1,14 +0,0 @@
[package]
name = "animated-show"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos", features = ["csr"] }
console_log = "1"
log = "0.4"
console_error_panic_hook = "0.1.7"

View File

@@ -1 +0,0 @@
extend = [{ path = "../cargo-make/main.toml" }]

View File

@@ -1,9 +0,0 @@
# `<AnimatedShow>` combined with CSS animations
This is a very simple example of the `<AnimatedShow>` component.
This component is an extension for the `<Show>` component and it will not take in a fallback, but it will unmount the
component from the DOM after a given duration. This makes it possible to have really easy unmount animations with just
CSS.
Just execute `trunk serve` to start the demo.

View File

@@ -1,42 +0,0 @@
<!DOCTYPE html>
<html>
<head>
<link data-trunk rel="rust" data-wasm-opt="z"/>
<link data-trunk rel="icon" type="image/ico" href="/public/favicon.ico"/>
<style>
.hover-me {
width: 100px;
margin: 1rem;
padding: 1rem;
text-align: center;
cursor: pointer;
border: 1px solid grey;
}
.here-i-am {
width: 100px;
margin: 1rem;
padding: 1rem;
text-align: center;
color: white;
font-weight: bold;
background: black;
}
@keyframes fade-in {
from { opacity: 0; }
to { opacity: 1; }
}
@keyframes fade-out {
from { opacity: 1; }
to { opacity: 0; }
}
.fade-in-1000 {
animation: 1000ms fade-in forwards;
}
.fade-out-1000 {
animation: 1000ms fade-out forwards;
}
</style>
</head>
<body></body>
</html>

Binary file not shown.

Before

Width:  |  Height:  |  Size: 15 KiB

View File

@@ -1,34 +0,0 @@
use core::time::Duration;
use leptos::*;
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let show = create_rw_signal(cx, false);
// the CSS classes in this example are just written directly inside the `index.html`
view! { cx,
<div
class="hover-me"
on:mouseenter=move |_| show.set(true)
on:mouseleave=move |_| show.set(false)
>
"Hover Me"
</div>
<AnimatedShow
when=show
// optional CSS class which will be applied if `when == true`
show_class="fade-in-1000"
// optional CSS class which will be applied if `when == false` and before the
// `hide_delay` starts -> makes CSS unmount animations really easy
hide_class="fade-out-1000"
// the given unmount delay which should match your unmount animation duration
hide_delay=Duration::from_millis(1000)
>
// provide any `Children` inside here
<div class="here-i-am">
"Here I Am!"
</div>
</AnimatedShow>
}
}

View File

@@ -1,12 +0,0 @@
use animated_show::App;
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 />
}
})
}

View File

@@ -1,6 +1,5 @@
[tasks.integration-test]
dependencies = ["cargo-leptos-e2e"]
[tasks.test-e2e]
dependencies = ["setup-node", "cargo-leptos-e2e"]
[tasks.cargo-leptos-e2e]
command = "cargo"
args = ["leptos", "end-to-end"]
[tasks.clean-all]
dependencies = ["clean-cargo", "clean-node_modules", "clean-playwright"]

View File

@@ -1,28 +0,0 @@
[tasks.clean]
dependencies = [
"clean-cargo",
"clean-trunk",
"clean-node_modules",
"clean-playwright",
]
[tasks.clean-cargo]
command = "cargo"
args = ["clean"]
[tasks.clean-trunk]
command = "trunk"
args = ["clean"]
[tasks.clean-node_modules]
script = '''
project_dir=${PWD##*/}
if [ "$project_dir" != "todomvc" ]; then
find . -type d -name node_modules | xargs rm -rf
fi
'''
[tasks.clean-playwright]
script = '''
find . -name playwright-report -name playwright -name test-results | xargs rm -rf
'''

View File

@@ -0,0 +1,98 @@
[tasks.pre-clippy]
env = { CARGO_MAKE_CLIPPY_ARGS = "--all-targets --all-features -- -D warnings" }
[tasks.check-style]
description = "Check for style violations"
dependencies = ["check-format-flow", "clippy-flow"]
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }
args = ["fmt", "--", "--check", "--config-path", "${LEPTOS_PROJECT_DIRECTORY}"]
[tasks.clean-cargo]
description = "Runs the cargo clean command."
category = "Cleanup"
command = "cargo"
args = ["clean"]
[tasks.clean-trunk]
description = "Runs the trunk clean command."
category = "Cleanup"
command = "trunk"
args = ["clean"]
[tasks.clean-node_modules]
description = "Delete all node_modules directories"
category = "Cleanup"
script = '''
find . -type d -name node_modules | xargs rm -rf
'''
[tasks.clean-playwright]
description = "Delete playwright directories"
category = "Cleanup"
script = '''
for pw_dir in $(find . -name playwright.config.ts | xargs dirname)
do
rm -rf $pw_dir/playwright-report pw_dir/playwright pw_dir/test-results
done
'''
[tasks.clean-all]
description = "Delete all temporary directories"
category = "Cleanup"
dependencies = ["clean-cargo"]
[tasks.test-wasm]
env = { CARGO_MAKE_WASM_TEST_ARGS = "--headless --chrome" }
command = "cargo"
args = ["make", "wasm-pack-test"]
[tasks.cargo-leptos-e2e]
description = "Runs end to end tests with cargo leptos"
command = "cargo"
args = ["leptos", "end-to-end"]
[tasks.setup-node]
description = "Install node dependencies and playwright browsers"
env = { PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1" }
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"
RED="\e[0;31m"
RESET="\e[0m"
project_dir=$CARGO_MAKE_WORKING_DIRECTORY
# Discover commands
if command -v pnpm; then
NODE_CMD=pnpm
PLAYWRIGHT_CMD=pnpm
elif command -v npm; then
NODE_CMD=npm
PLAYWRIGHT_CMD=npx
else
echo "${RED}${BOLD}ERROR${RESET} - pnpm or npm is required by this task"
exit 1
fi
# Install node dependencies
for node_path in $(find . -name package.json -not -path '*/node_modules/*')
do
node_dir=$(dirname $node_path)
echo Install node dependencies for $node_dir
cd $node_dir
${NODE_CMD} install
cd ${project_dir}
done
# Install playwright browsers
for pw_path in $(find . -name playwright.config.ts)
do
pw_dir=$(dirname $pw_path)
echo Install playwright browsers for $pw_dir
cd $pw_dir
${PLAYWRIGHT_CMD} playwright install
cd $project_dir
done
'''

View File

@@ -1,9 +0,0 @@
[tasks.pre-clippy]
env = { CARGO_MAKE_CLIPPY_ARGS = "--all-targets --all-features -- -D warnings" }
[tasks.check-style]
dependencies = ["check-format-flow", "clippy-flow"]
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }
args = ["fmt", "--", "--check", "--config-path", "${LEPTOS_PROJECT_DIRECTORY}"]

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@@ -1,32 +1,35 @@
extend = [
{ path = "../cargo-make/clean.toml" },
{ path = "../cargo-make/lint.toml" },
{ path = "../cargo-make/node.toml" },
]
# CI Stages
extend = [{ path = "../cargo-make/common.toml" }]
[tasks.ci]
dependencies = ["prepare", "lint", "build", "test-flow", "integration-test"]
[tasks.ci-clean]
dependencies = ["ci", "clean"]
[tasks.prepare]
dependencies = ["setup-node"]
[tasks.lint]
dependencies = ["check-style"]
[tasks.integration-test]
# ALIASES
alias = "verify-flow"
[tasks.verify-flow]
alias = "ci"
description = "Provides pre and post hooks for verify"
dependencies = ["pre-verify", "verify", "post-verify"]
[tasks.t]
dependencies = ["test-flow"]
[tasks.verify]
description = "Run all quality checks and tests"
dependencies = ["check-style", "test-unit-and-e2e"]
[tasks.it]
alias = "integration-test"
[tasks.test-unit-and-e2e]
description = "Run all unit and e2e tests"
dependencies = ["test-flow", "test-e2e-flow"]
[tasks.pre-verify]
[tasks.post-verify]
dependencies = ["maybe-clean-all"]
[tasks.maybe-clean-all]
description = "Used to clean up locally after call to verify-examples"
condition = { env_true = ["CLEAN_AFTER_VERIFY"] }
[tasks.test-e2e-flow]
description = "Provides pre and post hooks for test-e2e"
dependencies = ["pre-test-e2e", "test-e2e", "post-test-e2e"]
[tasks.pre-test-e2e]
[tasks.test-e2e]
[tasks.post-test-e2e]

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@@ -1,43 +0,0 @@
[tasks.setup-node]
description = "Install node dependencies and playwright browsers"
env = { PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1" }
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"
RED="\e[0;31m"
RESET="\e[0m"
project_dir=$CARGO_MAKE_WORKING_DIRECTORY
# Discover commands
if command -v pnpm; then
NODE_CMD=pnpm
PLAYWRIGHT_CMD=pnpm
elif command -v npm; then
NODE_CMD=npm
PLAYWRIGHT_CMD=npx
else
echo "${RED}${BOLD}ERROR${RESET} - pnpm or npm is required by this task"
exit 1
fi
# Install node dependencies
for node_path in $(find . -name package.json -not -path '*/node_modules/*')
do
node_dir=$(dirname $node_path)
echo Install node dependencies for $node_dir
cd $node_dir
${NODE_CMD} install
cd ${project_dir}
done
# Install playwright browsers
for pw_path in $(find . -name playwright.config.ts)
do
pw_dir=$(dirname $pw_path)
echo Install playwright browsers for $pw_dir
cd $pw_dir
${PLAYWRIGHT_CMD} playwright install
cd $project_dir
done
'''

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@@ -1,4 +1,7 @@
extend = [{ path = "../cargo-make/playwright.toml" }]
[tasks.integration-test]
dependencies = ["test-playwright-autostart"]
[tasks.test-e2e]
dependencies = ["setup-node", "test-playwright-autostart"]
[tasks.clean-all]
dependencies = ["clean-cargo", "clean-node_modules", "clean-playwright"]

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@@ -1,8 +1,22 @@
[tasks.clean-playwright]
description = "Delete playwright directories"
category = "Cleanup"
script = '''
for pw_dir in $(find . -name playwright.config.ts | xargs dirname)
do
rm -rf $pw_dir/playwright-report pw_dir/playwright pw_dir/test-results
done
'''
[tasks.test-playwright-autostart]
description = "Run playwright test with server autostart"
category = "Test"
command = "npm"
args = ["run", "e2e:auto-start"]
[tasks.test-playwright]
description = "Run playwright test"
category = "Test"
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"
@@ -32,6 +46,8 @@ done
'''
[tasks.test-playwright-ui]
description = "Run playwright test --ui"
category = "Test"
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"
@@ -61,6 +77,8 @@ done
'''
[tasks.test-playwright-report]
description = "Run playwright show-report"
category = "Test"
script = '''
BOLD="\e[1m"
GREEN="\e[0;32m"

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@@ -2,9 +2,13 @@
command = "trunk"
args = ["build"]
[tasks.clean-trunk]
command = "trunk"
args = ["clean"]
[tasks.start-trunk]
command = "trunk"
args = ["serve", "${@}"]
args = ["serve", "--open"]
[tasks.stop-trunk]
script = '''

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@@ -5,7 +5,5 @@ condition = { env_true = ["RUN_CARGO_TEST"] }
[tasks.post-test]
dependencies = ["test-wasm"]
[tasks.test-wasm]
env = { CARGO_MAKE_WASM_TEST_ARGS = "--headless --chrome" }
command = "cargo"
args = ["make", "wasm-pack-test"]
[tasks.clean-all]
dependencies = ["clean-cargo", "clean-trunk"]

View File

@@ -1,20 +0,0 @@
[package]
name = "counter_url_query"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos", features = ["csr", "nightly"] }
leptos_router = { path = "../../router", features = ["csr"] }
console_log = "1"
log = "0.4"
console_error_panic_hook = "0.1.7"
[dev-dependencies]
wasm-bindgen = "0.2"
wasm-bindgen-test = "0.3.0"
web-sys = "0.3"

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@@ -1 +0,0 @@
extend = [{ path = "../cargo-make/main.toml" }]

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@@ -1,7 +0,0 @@
# Leptos Query Counter Example
This example creates a simple counter whose state is persisted and synced in the url with query params.
To run it, just issue the `trunk serve --open` command in the example root. This will build the app, run it, and open a new browser to serve it.
> If you don't have `trunk` installed, [click here for install instructions.](https://trunkrs.dev/)

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@@ -1,8 +0,0 @@
<!DOCTYPE html>
<html>
<head>
<link data-trunk rel="rust" data-wasm-opt="z"/>
<link data-trunk rel="icon" type="image/ico" href="/public/favicon.ico"/>
</head>
<body></body>
</html>

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@@ -1,39 +0,0 @@
use leptos::*;
use leptos_router::*;
/// A simple counter component.
///
/// 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");
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 update_msg = move |ev| {
let new_msg = event_target_value(&ev);
if new_msg.is_empty() {
set_msg(None);
} else {
set_msg(Some(new_msg));
}
};
view! { cx,
<div>
<button on:click=clear>"Clear"</button>
<button on:click=decrement>"-1"</button>
<span>"Value: " {move || count().unwrap_or(0)} "!"</span>
<button on:click=increment>"+1"</button>
<br />
<input
prop:value=move || msg().unwrap_or_default()
on:input=update_msg
/>
</div>
}
}

View File

@@ -1,17 +0,0 @@
use counter_url_query::SimpleQueryCounter;
use leptos::*;
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,
<Router>
<Routes>
<Route path="" view=SimpleQueryCounter />
</Routes>
</Router>
}
})
}

View File

@@ -34,7 +34,7 @@ pub fn App(cx: Scope) -> impl IntoView {
</header>
<main>
<Routes>
<Route path="" view=ExampleErrors/>
<Route path="" view=|cx| view! { cx, <ExampleErrors/> }/>
</Routes>
</main>
</Router>

View File

@@ -80,7 +80,7 @@ This crate can be run without `cargo-leptos`, using `wasm-pack` and `cargo`. To
To run it as a server side app with hydration, first you should run
```bash
wasm-pack build --target=web --debug --no-default-features --features=hydrate
wasm-pack build --target=web --no-default-features --features=hydrate
```
to generate the WebAssembly to hydrate the HTML delivered from the server.
@@ -99,4 +99,4 @@ cargo run --no-default-features --features=ssr
You'll need to install trunk to client side render this bundle.
1. `cargo install trunk`
Then the site can be served with `trunk serve --open`
Then the site can be served with `trunk serve --open`

View File

@@ -170,7 +170,7 @@ pub fn TodoApp(cx: Scope) -> impl IntoView {
<hr/>
<main>
<Routes>
<Route path="" view=Todos/> //Route
<Route path="" view=|cx| view! { cx, <Todos/> }/> //Route
<Route path="signup" view=move |cx| view! {
cx,
<Signup action=signup/>

View File

@@ -90,8 +90,8 @@ By default, `cargo-leptos` uses `nightly` Rust, `cargo-generate`, and `sass`. If
## Alternatives to cargo-leptos
This crate can be run without `cargo-leptos`, using `wasm-pack` and `cargo`. To do so, you'll need to install some other tools. 0. `cargo install wasm-pack`
This crate can be run without `cargo-leptos`, using `wasm-pack` and `cargo`. To do so, you'll need to install some other tools.
0. `cargo install wasm-pack`
1. Edit the `[package.metadata.leptos]` section and set `site-root` to `"."`. You'll also want to change the path of the `<StyleSheet / >` component in the root component to point towards the CSS file in the root. This tells leptos that the WASM/JS files generated by wasm-pack are available at `./pkg` and that the CSS files are no longer processed by cargo-leptos. Building to alternative folders is not supported at this time. You'll also want to edit the call to `get_configuration()` to pass in `Some(Cargo.toml)`, so that Leptos will read the settings instead of cargo-leptos. If you do so, your file/folder names cannot include dashes.
### Server Side Rendering With Hydration
@@ -99,7 +99,7 @@ This crate can be run without `cargo-leptos`, using `wasm-pack` and `cargo`. To
To run it as a server side app with hydration, first you should run
```bash
wasm-pack build --target=web --debug --no-default-features --features=hydrate
wasm-pack build --target=web --no-default-features --features=hydrate
```
to generate the WebAssembly to hydrate the HTML delivered from the server.

View File

@@ -4,14 +4,6 @@ use leptos_meta::*;
use leptos_router::*;
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[cfg_attr(feature = "ssr", derive(sqlx::FromRow))]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
cfg_if! {
if #[cfg(feature = "ssr")] {
use sqlx::{Connection, SqliteConnection};
@@ -19,6 +11,20 @@ cfg_if! {
pub async fn db() -> Result<SqliteConnection, ServerFnError> {
Ok(SqliteConnection::connect("sqlite:Todos.db").await?)
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, sqlx::FromRow)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
} else {
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
}
}

View File

@@ -5,14 +5,6 @@ use leptos_meta::*;
use leptos_router::*;
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[cfg_attr(feature = "ssr", derive(sqlx::FromRow))]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
cfg_if! {
if #[cfg(feature = "ssr")] {
use sqlx::{Connection, SqliteConnection};
@@ -21,6 +13,20 @@ cfg_if! {
pub async fn db() -> Result<SqliteConnection, ServerFnError> {
Ok(SqliteConnection::connect("sqlite:Todos.db").await?)
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, sqlx::FromRow)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
} else {
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
}
}
@@ -104,7 +110,7 @@ pub fn TodoApp(cx: Scope) -> impl IntoView {
</header>
<main>
<Routes>
<Route path="" view=Todos/>
<Route path="" view=|cx| view! { cx, <Todos/> }/>
</Routes>
</main>
</Router>
@@ -126,6 +132,10 @@ pub fn Todos(cx: Scope) -> impl IntoView {
view! {
cx,
<form method="POST" action="/weird">
<input type="text" name="hi" value="John"/>
<input type="submit"/>
</form>
<div>
<MultiActionForm action=add_todo>
<label>

View File

@@ -5,14 +5,6 @@ use leptos_meta::*;
use leptos_router::*;
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[cfg_attr(feature = "ssr", derive(sqlx::FromRow))]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
cfg_if! {
if #[cfg(feature = "ssr")] {
use sqlx::{Connection, SqliteConnection};
@@ -21,6 +13,20 @@ cfg_if! {
pub async fn db() -> Result<SqliteConnection, ServerFnError> {
Ok(SqliteConnection::connect("sqlite:Todos.db").await?)
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, sqlx::FromRow)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
} else {
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Todo {
id: u16,
title: String,
completed: bool,
}
}
}
@@ -104,7 +110,10 @@ pub fn TodoApp(cx: Scope) -> impl IntoView {
</header>
<main>
<Routes>
<Route path="" view=Todos/> //Route
<Route path="" view=|cx| view! {
cx,
<Todos/>
}/> //Route
</Routes>
</main>
</Router>

View File

@@ -19,6 +19,3 @@ serde_json = "1"
parking_lot = "0.12.1"
regex = "1.7.0"
tracing = "0.1.37"
[features]
nonce = ["leptos/nonce"]

View File

@@ -1,4 +0,0 @@
extend = { path = "../../cargo-make/main.toml" }
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }

View File

@@ -223,30 +223,26 @@ pub fn handle_server_fns_with_context(
let res_options =
use_context::<ResponseOptions>(cx).unwrap();
let mut res: HttpResponseBuilder =
HttpResponse::Ok();
let mut res: HttpResponseBuilder;
let res_parts = res_options.0.write();
// if accept_header isn't set to one of these, it's a form submit
// redirect back to the referrer if not redirect has been set
if accept_header != Some("application/json")
&& accept_header
!= Some("application/x-www-form-urlencoded")
&& accept_header != Some("application/cbor")
if accept_header == Some("application/json")
|| accept_header
== Some("application/x-www-form-urlencoded")
|| accept_header == Some("application/cbor")
{
// Location will already be set if redirect() has been used
let has_location_set =
res_parts.headers.get("Location").is_some();
if !has_location_set {
let referer = req
.headers()
.get("Referer")
.and_then(|value| value.to_str().ok())
.unwrap_or("/");
res = HttpResponse::SeeOther();
res.insert_header(("Location", referer))
.content_type("application/json");
}
res = HttpResponse::Ok();
}
// otherwise, it's probably a <form> submit or something: redirect back to the referrer
else {
let referer = req
.headers()
.get("Referer")
.and_then(|value| value.to_str().ok())
.unwrap_or("/");
res = HttpResponse::SeeOther();
res.insert_header(("Location", referer))
.content_type("application/json");
};
// Override StatusCode if it was set in a Resource or Element
if let Some(status) = res_parts.status {
@@ -292,12 +288,7 @@ pub fn handle_server_fns_with_context(
} else {
HttpResponse::BadRequest().body(format!(
"Could not find a server function at the route {:?}. \
\n\nIt's likely that either
1. The API prefix you specify in the `#[server]` \
macro doesn't match the prefix at which your server \
function handler is mounted, or \n2. You are on a \
platform that doesn't support automatic server \
function registration and you need to call \
\n\nIt's likely that you need to call \
ServerFn::register_explicit() on the server function \
type, somewhere in your `main` function.",
req.path()
@@ -733,8 +724,6 @@ fn provide_contexts(
provide_context(cx, res_options);
provide_context(cx, req.clone());
provide_server_redirect(cx, move |path| redirect(cx, path));
#[cfg(feature = "nonce")]
leptos::nonce::provide_nonce(cx);
}
fn leptos_corrected_path(req: &HttpRequest) -> String {
@@ -799,11 +788,8 @@ async fn build_stream_response(
// wait for any blocking resources to load before pulling metadata
let first_app_chunk = stream.next().await.unwrap_or_default();
let (head, tail) = html_parts_separated(
cx,
options,
use_context::<MetaContext>(cx).as_ref(),
);
let (head, tail) =
html_parts_separated(options, use_context::<MetaContext>(cx).as_ref());
let mut stream = Box::pin(
futures::stream::once(async move { head.clone() })

View File

@@ -19,9 +19,6 @@ leptos_integration_utils = { workspace = true }
serde_json = "1"
tokio = { version = "1", features = ["full"] }
parking_lot = "0.12.1"
tokio-util = { version = "0.7.7", features = ["rt"] }
tokio-util = {version = "0.7.7", features = ["rt"] }
tracing = "0.1.37"
once_cell = "1.17"
[features]
nonce = ["leptos/nonce"]

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@@ -1,4 +0,0 @@
extend = { path = "../../cargo-make/main.toml" }
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }

View File

@@ -335,14 +335,9 @@ async fn handle_server_fns_inner(
Response::builder().status(StatusCode::BAD_REQUEST).body(
Full::from(format!(
"Could not find a server function at the route \
{fn_name}. \n\nIt's likely that either
1. The API prefix you specify in the `#[server]` \
macro doesn't match the prefix at which your server \
function handler is mounted, or \n2. You are on a \
platform that doesn't support automatic server \
function registration and you need to call \
{fn_name}. \n\nIt's likely that you need to call \
ServerFn::register_explicit() on the server function \
type, somewhere in your `main` function.",
type, somewhere in your `main` function."
)),
)
}
@@ -605,6 +600,7 @@ where
let res_options3 = default_res_options.clone();
let local_pool = get_leptos_pool();
let (tx, rx) = futures::channel::mpsc::channel(8);
let (runtime_tx, runtime_rx) = futures::channel::oneshot::channel();
let current_span = tracing::Span::current();
local_pool.spawn_pinned(move || async move {
@@ -629,12 +625,17 @@ where
replace_blocks
);
forward_stream(&options, res_options2, bundle, runtime, scope, tx).await;
runtime_tx.send(runtime).expect("should be able to send runtime");
runtime.dispose();
forward_stream(&options, res_options2, bundle, runtime, scope, tx).await;
}.instrument(current_span));
generate_response(res_options3, rx)
async move {
let runtime = runtime_rx
.await
.expect("runtime should be sent by renderer");
generate_response(res_options3, rx, runtime).await
}
})
}
}
@@ -643,6 +644,7 @@ where
async fn generate_response(
res_options: ResponseOptions,
rx: Receiver<String>,
runtime: RuntimeId,
) -> Response<StreamBody<PinnedHtmlStream>> {
let mut stream = Box::pin(rx.map(|html| Ok(Bytes::from(html))));
@@ -655,7 +657,11 @@ async fn generate_response(
let complete_stream =
futures::stream::iter([first_chunk.unwrap(), second_chunk.unwrap()])
.chain(stream);
.chain(stream)
.chain(futures::stream::once(async move {
runtime.dispose();
Ok(Default::default())
}));
let mut res = Response::new(StreamBody::new(
Box::pin(complete_stream) as PinnedHtmlStream
@@ -682,11 +688,8 @@ async fn forward_stream(
let mut shell = Box::pin(bundle);
let first_app_chunk = shell.next().await.unwrap_or_default();
let (head, tail) = html_parts_separated(
cx,
options,
use_context::<MetaContext>(cx).as_ref(),
);
let (head, tail) =
html_parts_separated(options, use_context::<MetaContext>(cx).as_ref());
_ = tx.send(head).await;
_ = tx.send(first_app_chunk).await;
@@ -770,6 +773,8 @@ where
let full_path = format!("http://leptos.dev{path}");
let (tx, rx) = futures::channel::mpsc::channel(8);
let (runtime_tx, runtime_rx) =
futures::channel::oneshot::channel();
let local_pool = get_leptos_pool();
let current_span = tracing::Span::current();
local_pool.spawn_pinned(|| async move {
@@ -789,12 +794,15 @@ where
add_context,
);
forward_stream(&options, res_options2, bundle, runtime, scope, tx).await;
runtime_tx.send(runtime).expect("should be able to send runtime");
runtime.dispose();
forward_stream(&options, res_options2, bundle, runtime, scope, tx).await;
}.instrument(current_span));
generate_response(res_options3, rx).await
let runtime = runtime_rx
.await
.expect("runtime should be sent by renderer");
generate_response(res_options3, rx, runtime).await
}
})
}
@@ -815,8 +823,6 @@ fn provide_contexts(
provide_context(cx, extractor);
provide_context(cx, default_res_options);
provide_server_redirect(cx, move |path| redirect(cx, path));
#[cfg(feature = "nonce")]
leptos::nonce::provide_nonce(cx);
}
/// Returns an Axum [Handler](axum::handler::Handler) that listens for a `GET` request and tries

View File

@@ -1,4 +0,0 @@
extend = { path = "../../cargo-make/main.toml" }
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }

View File

@@ -1,18 +1,18 @@
use futures::{Stream, StreamExt};
use leptos::{nonce::use_nonce, use_context, RuntimeId, Scope, ScopeId};
use leptos::{use_context, RuntimeId, ScopeId};
use leptos_config::LeptosOptions;
use leptos_meta::MetaContext;
extern crate tracing;
#[tracing::instrument(level = "trace", fields(error), skip_all)]
fn autoreload(nonce_str: &str, options: &LeptosOptions) -> String {
fn autoreload(options: &LeptosOptions) -> String {
let site_ip = &options.site_addr.ip().to_string();
let reload_port = options.reload_port;
match std::env::var("LEPTOS_WATCH").is_ok() {
true => format!(
r#"
<script crossorigin=""{nonce_str}>(function () {{
<script crossorigin="">(function () {{
{}
var ws = new WebSocket('ws://{site_ip}:{reload_port}/live_reload');
ws.onmessage = (ev) => {{
@@ -42,8 +42,6 @@ fn autoreload(nonce_str: &str, options: &LeptosOptions) -> String {
false => "".to_string(),
}
}
#[deprecated = "Use html_parts_separated."]
#[tracing::instrument(level = "trace", fields(error), skip_all)]
pub fn html_parts(
options: &LeptosOptions,
@@ -52,7 +50,7 @@ pub fn html_parts(
let pkg_path = &options.site_pkg_dir;
let output_name = &options.output_name;
// Because wasm-pack adds _bg to the end of the WASM filename, and we want to maintain compatibility with it's default options
// Because wasm-pack adds _bg to the end of the WASM filename, and we want to mantain compatibility with it's default options
// we add _bg to the wasm files if cargo-leptos doesn't set the env var LEPTOS_OUTPUT_NAME at compile time
// Otherwise we need to add _bg because wasm_pack always does.
let mut wasm_output_name = output_name.clone();
@@ -60,7 +58,7 @@ pub fn html_parts(
wasm_output_name.push_str("_bg");
}
let leptos_autoreload = autoreload("", options);
let leptos_autoreload = autoreload(options);
let html_metadata =
meta.and_then(|mc| mc.html.as_string()).unwrap_or_default();
@@ -82,27 +80,21 @@ pub fn html_parts(
#[tracing::instrument(level = "trace", fields(error), skip_all)]
pub fn html_parts_separated(
cx: Scope,
options: &LeptosOptions,
meta: Option<&MetaContext>,
) -> (String, &'static str) {
let pkg_path = &options.site_pkg_dir;
let output_name = &options.output_name;
let nonce = use_nonce(cx);
let nonce = nonce
.as_ref()
.map(|nonce| format!(" nonce=\"{nonce}\""))
.unwrap_or_default();
// Because wasm-pack adds _bg to the end of the WASM filename, and we want to maintain compatibility with it's default options
// we add _bg to the wasm files if cargo-leptos doesn't set the env var LEPTOS_OUTPUT_NAME at compile time
// Otherwise we need to add _bg because wasm_pack always does.
// Because wasm-pack adds _bg to the end of the WASM filename, and we want to mantain compatibility with it's default options
// we add _bg to the wasm files if cargo-leptos doesn't set the env var LEPTOS_OUTPUT_NAME
// Otherwise we need to add _bg because wasm_pack always does. This is not the same as options.output_name, which is set regardless
let mut wasm_output_name = output_name.clone();
if std::option_env!("LEPTOS_OUTPUT_NAME").is_none() {
if std::env::var("LEPTOS_OUTPUT_NAME").is_err() {
wasm_output_name.push_str("_bg");
}
let leptos_autoreload = autoreload(&nonce, options);
let leptos_autoreload = autoreload(options);
let html_metadata =
meta.and_then(|mc| mc.html.as_string()).unwrap_or_default();
@@ -117,9 +109,9 @@ pub fn html_parts_separated(
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
{head}
<link rel="modulepreload" href="/{pkg_path}/{output_name}.js"{nonce}>
<link rel="preload" href="/{pkg_path}/{wasm_output_name}.wasm" as="fetch" type="application/wasm" crossorigin=""{nonce}>
<script type="module"{nonce}>import init, {{ hydrate }} from '/{pkg_path}/{output_name}.js'; init('/{pkg_path}/{wasm_output_name}.wasm').then(hydrate);</script>
<link rel="modulepreload" href="/{pkg_path}/{output_name}.js">
<link rel="preload" href="/{pkg_path}/{wasm_output_name}.wasm" as="fetch" type="application/wasm" crossorigin="">
<script type="module">import init, {{ hydrate }} from '/{pkg_path}/{output_name}.js'; init('/{pkg_path}/{wasm_output_name}.wasm').then(hydrate);</script>
{leptos_autoreload}
"#
);
@@ -141,14 +133,15 @@ pub async fn build_async_response(
}
let cx = leptos::Scope { runtime, id: scope };
let (head, tail) = html_parts_separated(
cx,
options,
use_context::<MetaContext>(cx).as_ref(),
);
let (head, tail) =
html_parts_separated(options, use_context::<MetaContext>(cx).as_ref());
// in async, we load the meta content *now*, after the suspenses have resolved
let meta = use_context::<MetaContext>(cx);
let head_meta = meta
.as_ref()
.map(|meta| meta.dehydrate())
.unwrap_or_default();
let body_meta = meta
.as_ref()
.and_then(|meta| meta.body.as_string())
@@ -156,5 +149,5 @@ pub async fn build_async_response(
runtime.dispose();
format!("{head}</head><body{body_meta}>{buf}{tail}")
format!("{head}{head_meta}</head><body{body_meta}>{buf}{tail}")
}

View File

@@ -19,6 +19,3 @@ leptos_integration_utils = { workspace = true }
serde_json = "1"
tokio = { version = "1", features = ["full"] }
parking_lot = "0.12.1"
[features]
nonce = ["leptos/nonce"]

View File

@@ -1,4 +0,0 @@
extend = { path = "../../cargo-make/main.toml" }
[tasks.check-format]
env = { LEPTOS_PROJECT_DIRECTORY = "../../" }

View File

@@ -312,17 +312,10 @@ async fn handle_server_fns_inner(
.body(Body::from(format!(
"Could not find a server function at the \
route {fn_name}. \n\nIt's likely that \
either
1. The API prefix you specify in the \
`#[server]` macro doesn't match the \
prefix at which your server function \
handler is mounted, or \n2. You are on a \
platform that doesn't support automatic \
server function registration and you \
need to call \
you need to call \
ServerFn::register_explicit() on the \
server function type, somewhere in your \
`main` function.",
`main` function."
)))
}
.expect("could not build Response");
@@ -655,11 +648,8 @@ async fn forward_stream(
mut tx: Sender<String>,
) {
let cx = Scope { runtime, id: scope };
let (head, tail) = html_parts_separated(
cx,
options,
use_context::<MetaContext>(cx).as_ref(),
);
let (head, tail) =
html_parts_separated(options, use_context::<MetaContext>(cx).as_ref());
_ = tx.send(head).await;
let mut shell = Box::pin(bundle);
@@ -796,8 +786,6 @@ fn provide_contexts(
provide_context(cx, req_parts);
provide_context(cx, default_res_options);
provide_server_redirect(cx, move |path| redirect(cx, path));
#[cfg(feature = "nonce")]
leptos::nonce::provide_nonce(cx);
}
/// Returns a Viz [Handler](viz::Handler) that listens for a `GET` request and tries

View File

@@ -13,28 +13,28 @@ cfg-if = "1"
leptos_dom = { workspace = true }
leptos_macro = { workspace = true }
leptos_reactive = { workspace = true }
leptos_server = { workspace = true }
leptos_server = { workspace = true}
leptos_config = { workspace = true }
tracing = "0.1"
typed-builder = "0.14"
server_fn = { workspace = true }
server_fn = { workspace = true}
web-sys = { version = "0.3.63", optional = true }
wasm-bindgen = { version = "0.2", optional = true }
[dev-dependencies]
leptos = { path = "." }
leptos = { path = "."}
[features]
default = ["serde"]
template_macro = ["leptos_dom/web", "web-sys", "wasm-bindgen"]
csr = [
"leptos_dom/csr",
"leptos_dom/web",
"leptos_macro/csr",
"leptos_reactive/csr",
"leptos_server/csr",
]
hydrate = [
"leptos_dom/hydrate",
"leptos_dom/web",
"leptos_macro/hydrate",
"leptos_reactive/hydrate",
"leptos_server/hydrate",
@@ -58,18 +58,9 @@ serde-lite = ["leptos_reactive/serde-lite"]
miniserde = ["leptos_reactive/miniserde"]
rkyv = ["leptos_reactive/rkyv"]
tracing = ["leptos_macro/tracing"]
nonce = ["leptos_dom/nonce"]
[package.metadata.cargo-all-features]
denylist = [
"nightly",
"tracing",
"template_macro",
"rustls",
"default-tls",
"web-sys",
"wasm-bindgen",
]
denylist = ["nightly", "tracing", "template_macro", "rustls", "default-tls", "web-sys", "wasm-bindgen"]
skip_feature_sets = [
[
"csr",

View File

@@ -1,14 +1,3 @@
extend = { path = "../cargo-make/main.toml" }
[tasks.check]
clear = true
dependencies = [
"check-all",
"check-wasm",
"check-release",
"check-wasm-release",
]
[tasks.check-wasm]
clear = true
dependencies = ["check-hydrate", "check-csr"]
@@ -54,7 +43,3 @@ args = [
"--features=csr",
"--target=wasm32-unknown-unknown",
]
[tasks.check-release]
command = "cargo"
args = ["check", "--release"]

View File

@@ -1,111 +0,0 @@
use crate::Show;
use core::time::Duration;
use leptos::component;
use leptos_dom::{helpers::TimeoutHandle, Fragment, IntoView};
use leptos_macro::view;
use leptos_reactive::{
create_effect, on_cleanup, signal_prelude::*, store_value, Scope,
StoredValue,
};
/// A component that will show its children when the `when` condition is `true`.
/// Additionally, you need to specify a `hide_delay`. If the `when` condition changes to `false`,
/// the unmounting of the children will be delayed by the specified Duration.
/// If you provide the optional `show_class` and `hide_class`, you can create very easy mount /
/// unmount animations.
///
/// ```rust
/// # use core::time::Duration;
/// # use leptos::*;
/// # #[component]
/// # pub fn App(cx: Scope) -> impl IntoView {
/// let show = create_rw_signal(cx, false);
///
/// view! { cx,
/// <div
/// class="hover-me"
/// on:mouseenter=move |_| show.set(true)
/// on:mouseleave=move |_| show.set(false)
/// >
/// "Hover Me"
/// </div>
///
/// <AnimatedShow
/// when=show
/// show_class="fade-in-1000"
/// hide_class="fade-out-1000"
/// hide_delay=Duration::from_millis(1000)
/// >
/// <div class="here-i-am">
/// "Here I Am!"
/// </div>
/// </AnimatedShow>
/// }
/// # }
/// ```
#[cfg_attr(
any(debug_assertions, feature = "ssr"),
tracing::instrument(level = "info", skip_all)
)]
#[component]
pub fn AnimatedShow(
/// The scope the component is running in
cx: Scope,
/// The components Show wraps
children: Box<dyn Fn(Scope) -> Fragment>,
/// If the component should show or not
#[prop(into)]
when: MaybeSignal<bool>,
/// Optional CSS class to apply if `when == true`
#[prop(optional)]
show_class: &'static str,
/// Optional CSS class to apply if `when == false`
#[prop(optional)]
hide_class: &'static str,
/// The timeout after which the component will be unmounted if `when == false`
hide_delay: Duration,
) -> impl IntoView {
let handle: StoredValue<Option<TimeoutHandle>> = store_value(cx, None);
let cls = create_rw_signal(
cx,
if when.get_untracked() {
show_class
} else {
hide_class
},
);
let show = create_rw_signal(cx, when.get_untracked());
create_effect(cx, move |_| {
if when.get() {
// clear any possibly active timer
if let Some(h) = handle.get_value() {
h.clear();
}
cls.set(show_class);
show.set(true);
} else {
cls.set(hide_class);
let h = leptos_dom::helpers::set_timeout_with_handle(
move || show.set(false),
hide_delay,
)
.expect("set timeout in AnimatedShow");
handle.set_value(Some(h));
}
});
on_cleanup(cx, move || {
if let Some(h) = handle.get_value() {
h.clear();
}
});
view! { cx,
<Show when=move || show.get() fallback=|_| ()>
<div class=move || cls.get()>{children(cx)}</div>
</Show>
}
}

View File

@@ -58,16 +58,13 @@ where
F: Fn(Scope, RwSignal<Errors>) -> IV + 'static,
IV: IntoView,
{
let before_children = HydrationCtx::next_component();
_ = HydrationCtx::next_component();
let errors: RwSignal<Errors> = create_rw_signal(cx, Errors::default());
provide_context(cx, errors);
// Run children so that they render and execute resources
_ = HydrationCtx::next_component();
let children = children(cx);
HydrationCtx::continue_from(before_children);
#[cfg(all(debug_assertions, feature = "hydrate"))]
{

View File

@@ -84,18 +84,11 @@
//! from the server to the client.
//! - `serde-lite` In SSR/hydrate mode, uses [serde-lite](https://docs.rs/serde-lite/latest/serde_lite/) to serialize resources and send them
//! from the server to the client.
//! - `rkyv` In SSR/hydrate mode, uses [rkyv](https://docs.rs/rkyv/latest/rkyv/) to serialize resources and send them
//! from the server to the client.
//! - `miniserde` In SSR/hydrate mode, uses [miniserde](https://docs.rs/miniserde/latest/miniserde/) to serialize resources and send them
//! from the server to the client.
//! - `tracing` Adds additional support for [`tracing`](https://docs.rs/tracing/latest/tracing/) to components.
//! - `default-tls` Use default native TLS support. (Only applies when using server functions with a non-WASM client like a desktop app.)
//! - `rustls` Use `rustls`. (Only applies when using server functions with a non-WASM client like a desktop app.)
//! - `template_macro` Enables the [`template!`](leptos_macro::template) macro, which offers faster DOM node creation for some use cases in `csr`.
//!
//! **Important Note:** You must enable one of `csr`, `hydrate`, or `ssr` to tell Leptos
//! which mode your app is operating in. You should only enable one of these per build target,
//! i.e., you should not have both `hydrate` and `ssr` enabled for your server binary, only `ssr`.
//! which mode your app is operating in.
//!
//! # A Simple Counter
//!
@@ -164,10 +157,9 @@ pub use leptos_dom::{
set_interval_with_handle, set_timeout, set_timeout_with_handle,
window_event_listener, window_event_listener_untyped,
},
html, log, math, mount_to, mount_to_body, nonce, svg, warn, window,
Attribute, Class, CollectView, Errors, Fragment, HtmlElement,
IntoAttribute, IntoClass, IntoProperty, IntoStyle, IntoView, NodeRef,
Property, View,
html, log, math, mount_to, mount_to_body, svg, warn, window, Attribute,
Class, CollectView, Errors, Fragment, HtmlElement, IntoAttribute,
IntoClass, IntoProperty, IntoStyle, IntoView, NodeRef, Property, View,
};
/// Types to make it easier to handle errors in your application.
@@ -189,14 +181,12 @@ pub use typed_builder;
pub use {leptos_macro::template, wasm_bindgen, web_sys};
mod error_boundary;
pub use error_boundary::*;
mod animated_show;
mod for_loop;
mod show;
pub use animated_show::*;
pub use for_loop::*;
pub use show::*;
pub use suspense_component::*;
mod suspense_component;
pub use suspense_component::*;
mod text_prop;
mod transition;
pub use text_prop::TextProp;

View File

@@ -1,4 +1,4 @@
use leptos_dom::{Fragment, HydrationCtx, IntoView, View};
use leptos_dom::{Fragment, IntoView, View};
use leptos_macro::component;
use leptos_reactive::{
create_isomorphic_effect, use_context, Scope, SignalGet, SignalSetter,
@@ -99,7 +99,7 @@ where
let is_first_run =
is_first_run(&first_run, &suspense_context);
first_run.set(false);
first_run.set(is_first_run);
if let Some(prev_children) = &*prev_child.borrow() {
if is_first_run {
@@ -127,10 +127,7 @@ where
if is_first_run(&first_run, &suspense_context) {
let has_local_only = suspense_context.has_local_only()
|| cfg!(feature = "csr");
if (!has_local_only || child_runs.get() > 0)
&& (cfg!(feature = "csr")
|| HydrationCtx::is_hydrating())
{
if !has_local_only || child_runs.get() > 0 {
first_run.set(false);
}
}
@@ -166,7 +163,7 @@ fn is_first_run(
// SSR but with only local resources (so, has not streamed)
(_, false, true) => true,
// hydrate: it's the first run
(first_run, true, _) => HydrationCtx::is_hydrating() || first_run,
(_, true, _) => true,
}
}
}

View File

@@ -52,12 +52,12 @@ pub fn App(cx: Scope) -> impl IntoView {
<Outlet/>
}
>
<Route path="" view=Nested
<Route path="inside" view=NestedResourceInside
<Route path="single" view=Single
<Route path="parallel" view=Parallel
<Route path="inside-component" view=InsideComponent
<Route path="none" view=None
<Route path="" view=|cx| view! { cx, <Nested/> }/>
<Route path="inside" view=|cx| view! { cx, <NestedResourceInside/> }/>
<Route path="single" view=|cx| view! { cx, <Single/> }/>
<Route path="parallel" view=|cx| view! { cx, <Parallel/> }/>
<Route path="inside-component" view=|cx| view! { cx, <InsideComponent/> }/>
<Route path="none" view=|cx| view! { cx, <None/> }/>
</Route>
// in-order
<Route
@@ -69,12 +69,12 @@ pub fn App(cx: Scope) -> impl IntoView {
<Outlet/>
}
>
<Route path="" view=Nested
<Route path="inside" view=NestedResourceInside
<Route path="single" view=Single
<Route path="parallel" view=Parallel
<Route path="inside-component" view=InsideComponent
<Route path="none" view=None
<Route path="" view=|cx| view! { cx, <Nested/> }/>
<Route path="inside" view=|cx| view! { cx, <NestedResourceInside/> }/>
<Route path="single" view=|cx| view! { cx, <Single/> }/>
<Route path="parallel" view=|cx| view! { cx, <Parallel/> }/>
<Route path="inside-component" view=|cx| view! { cx, <InsideComponent/> }/>
<Route path="none" view=|cx| view! { cx, <None/> }/>
</Route>
// async
<Route
@@ -86,12 +86,12 @@ pub fn App(cx: Scope) -> impl IntoView {
<Outlet/>
}
>
<Route path="" view=Nested
<Route path="inside" view=NestedResourceInside
<Route path="single" view=Single
<Route path="parallel" view=Parallel
<Route path="inside-component" view=InsideComponent
<Route path="none" view=None
<Route path="" view=|cx| view! { cx, <Nested/> }/>
<Route path="inside" view=|cx| view! { cx, <NestedResourceInside/> }/>
<Route path="single" view=|cx| view! { cx, <Single/> }/>
<Route path="parallel" view=|cx| view! { cx, <Parallel/> }/>
<Route path="inside-component" view=|cx| view! { cx, <InsideComponent/> }/>
<Route path="none" view=|cx| view! { cx, <None/> }/>
</Route>
</Routes>
</main>
@@ -289,4 +289,4 @@ fn None(cx: Scope) -> impl IntoView {
</div>
</div>
}
}
}

View File

@@ -1 +0,0 @@
extend = { path = "../cargo-make/main.toml" }

View File

@@ -14,7 +14,6 @@ use typed_builder::TypedBuilder;
/// A Struct to allow us to parse LeptosOptions from the file. Not really needed, most interactions should
/// occur with LeptosOptions
#[derive(Clone, Debug, serde::Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct ConfFile {
pub leptos_options: LeptosOptions,
}
@@ -24,37 +23,31 @@ pub struct ConfFile {
/// correct path for WASM, JS, and Websockets, as well as other configuration tasks.
/// It shares keys with cargo-leptos, to allow for easy interoperability
#[derive(TypedBuilder, Debug, Clone, serde::Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct LeptosOptions {
/// The name of the WASM and JS files generated by wasm-bindgen. Defaults to the crate name with underscores instead of dashes
#[builder(setter(into))]
pub output_name: String,
/// The path of the all the files generated by cargo-leptos. This defaults to '.' for convenience when integrating with other
/// tools.
#[builder(setter(into), default=default_site_root())]
#[serde(default = "default_site_root")]
#[builder(setter(into), default=".".to_string())]
pub site_root: String,
/// The path of the WASM and JS files generated by wasm-bindgen from the root of your app
/// By default, wasm-bindgen puts them in `pkg`.
#[builder(setter(into), default=default_site_pkg_dir())]
#[serde(default = "default_site_pkg_dir")]
#[builder(setter(into), default="pkg".to_string())]
pub site_pkg_dir: String,
/// Used to configure the running environment of Leptos. Can be used to load dev constants and keys v prod, or change
/// things based on the deployment environment
/// I recommend passing in the result of `env::var("LEPTOS_ENV")`
#[builder(setter(into), default=default_env())]
#[serde(default = "default_env")]
#[builder(setter(into), default=Env::DEV)]
pub env: Env,
/// Provides a way to control the address leptos is served from.
/// Using an env variable here would allow you to run the same code in dev and prod
/// Defaults to `127.0.0.1:3000`
#[builder(setter(into), default=default_site_addr())]
#[serde(default = "default_site_addr")]
#[builder(setter(into), default=SocketAddr::from(([127,0,0,1], 3000)))]
pub site_addr: SocketAddr,
/// The port the Websocket watcher listens on. Should match the `reload_port` in cargo-leptos(if using).
/// Defaults to `3001`
#[builder(default = default_reload_port())]
#[serde(default = "default_reload_port")]
#[builder(default = 3001)]
pub reload_port: u32,
}
@@ -88,26 +81,6 @@ impl LeptosOptions {
}
}
fn default_site_root() -> String {
".".to_string()
}
fn default_site_pkg_dir() -> String {
"pkg".to_string()
}
fn default_env() -> Env {
Env::DEV
}
fn default_site_addr() -> SocketAddr {
SocketAddr::from(([127, 0, 0, 1], 3000))
}
fn default_reload_port() -> u32 {
3001
}
fn env_w_default(
key: &str,
default: &str,
@@ -122,7 +95,7 @@ fn env_w_default(
/// An enum that can be used to define the environment Leptos is running in.
/// Setting this to the `PROD` variant will not include the WebSocket code for `cargo-leptos` watch mode.
/// Defaults to `DEV`.
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize, PartialEq, Eq)]
#[derive(Debug, Clone, serde::Deserialize)]
pub enum Env {
PROD,
DEV,
@@ -179,9 +152,9 @@ impl TryFrom<String> for Env {
/// Loads [LeptosOptions] from a Cargo.toml text content with layered overrides.
/// If an env var is specified, like `LEPTOS_ENV`, it will override a setting in the file.
pub fn get_config_from_str(text: &str) -> Result<ConfFile, LeptosConfigError> {
let re: Regex = Regex::new(r"(?m)^\[package.metadata.leptos\]").unwrap();
let re: Regex = Regex::new(r#"(?m)^\[package.metadata.leptos\]"#).unwrap();
let re_workspace: Regex =
Regex::new(r"(?m)^\[\[workspace.metadata.leptos\]\]").unwrap();
Regex::new(r#"(?m)^\[\[workspace.metadata.leptos\]\]"#).unwrap();
let metadata_name;
let start;
@@ -202,7 +175,9 @@ pub fn get_config_from_str(text: &str) -> Result<ConfFile, LeptosConfigError> {
// so that serde error messages have right line number
let newlines = text[..start].matches('\n').count();
let input = "\n".repeat(newlines) + &text[start..];
let toml = input.replace(metadata_name, "[leptos-options]");
let toml = input
.replace(metadata_name, "[leptos_options]")
.replace('-', "_");
let settings = Config::builder()
// Read the "default" configuration file
.add_source(File::from_str(&toml, FileFormat::Toml))

View File

@@ -46,7 +46,7 @@ async fn get_configuration_from_file_ok() {
.unwrap()
.leptos_options;
assert_eq!(config.output_name, "app-test");
assert_eq!(config.output_name, "app_test");
assert_eq!(config.site_root, "my_target/site");
assert_eq!(config.site_pkg_dir, "my_pkg");
assert_eq!(
@@ -93,7 +93,7 @@ async fn get_config_from_file_ok() {
.unwrap()
.leptos_options;
assert_eq!(config.output_name, "app-test");
assert_eq!(config.output_name, "app_test");
assert_eq!(config.site_root, "my_target/site");
assert_eq!(config.site_pkg_dir, "my_pkg");
assert_eq!(
@@ -128,7 +128,7 @@ fn get_config_from_str_content() {
let config = get_config_from_str(CARGO_TOML_CONTENT_OK)
.unwrap()
.leptos_options;
assert_eq!(config.output_name, "app-test");
assert_eq!(config.output_name, "app_test");
assert_eq!(config.site_root, "my_target/site");
assert_eq!(config.site_pkg_dir, "my_pkg");
assert_eq!(
@@ -141,14 +141,14 @@ fn get_config_from_str_content() {
#[tokio::test]
async fn get_config_from_env() {
// Test config values from environment variables
std::env::set_var("LEPTOS_OUTPUT_NAME", "app-test");
std::env::set_var("LEPTOS_OUTPUT_NAME", "app_test");
std::env::set_var("LEPTOS_SITE_ROOT", "my_target/site");
std::env::set_var("LEPTOS_SITE_PKG_DIR", "my_pkg");
std::env::set_var("LEPTOS_SITE_ADDR", "0.0.0.0:80");
std::env::set_var("LEPTOS_RELOAD_PORT", "8080");
let config = get_configuration(None).await.unwrap().leptos_options;
assert_eq!(config.output_name, "app-test");
assert_eq!(config.output_name, "app_test");
assert_eq!(config.site_root, "my_target/site");
assert_eq!(config.site_pkg_dir, "my_pkg");
@@ -176,8 +176,8 @@ async fn get_config_from_env() {
#[test]
fn leptos_options_builder_default() {
let conf = LeptosOptions::builder().output_name("app-test").build();
assert_eq!(conf.output_name, "app-test");
let conf = LeptosOptions::builder().output_name("app_test").build();
assert_eq!(conf.output_name, "app_test");
assert!(matches!(conf.env, Env::DEV));
assert_eq!(conf.site_pkg_dir, "pkg");
assert_eq!(conf.site_root, ".");

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