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262 Commits

Author SHA1 Message Date
Greg Johnston
047f0dda0e chore: clear clippy warnings 2023-03-21 17:12:35 -04:00
Greg Johnston
c086ce21a6 v0.2.4 2023-03-21 17:12:35 -04:00
martin frances
d371b09eda clippy: simplify Box::pin() call. (#718) 2023-03-21 17:12:35 -04:00
Greg Johnston
5a1d249626 fix: <Transition/> behavior (#717) 2023-03-21 17:12:34 -04:00
Greg Johnston
aa0fa40eac docs: small fixes (#715) 2023-03-21 17:12:34 -04:00
Carlton Gibson
e36a2ba6df Used modulo rather than bitwise & for is_odd check.
The modulo operator is less of a head-scratcher for folks coming through here. The bitwise & is equally correct (clearly) but is likely to cause confusion if folks don't immediately see what's going on.
2023-03-21 17:12:34 -04:00
Greg Johnston
2072d69cad chore: clear warning and add exports of helpers with handles 2023-03-21 17:12:34 -04:00
Greg Johnston
2c5253c2ce chore: handle unbounded_send warnings 2023-03-21 17:12:34 -04:00
Greg Johnston
3558439577 feat: add Scope::batch() (#711) 2023-03-21 17:12:34 -04:00
Greg Johnston
b82a15cf67 feat: allow manual signal disposal before the scope is disposed (#710) 2023-03-21 17:12:34 -04:00
Greg Johnston
917733b393 feat: add set_interval_with_handle and deprecate set_interval (#709) 2023-03-21 17:12:34 -04:00
martin frances
b3c5982ac8 clippy: less .clone() calls, simpler pointer passing. (#707) 2023-03-21 17:12:34 -04:00
Alexis Fontaine
3da1b72a3f fix: view! macro not compiling with a non-default scope name (#704) 2023-03-21 17:12:34 -04:00
Greg Johnston
e65bde9a5a feat: add a debounce helper for event listeners (#691) 2023-03-21 17:12:34 -04:00
Elliot Waite
b6b4f51b11 feat: add request_animation_frame_with_handle and request_idle_callback_with_handle (#698) 2023-03-21 17:12:34 -04:00
Greg Johnston
396a3506ff fix: ignore view markers in DynChild hydration (closes issue #697) (#703) 2023-03-21 17:12:34 -04:00
Greg Johnston
1bde018ca0 fix issues in release mode (closes #700) (#701) 2023-03-21 17:12:34 -04:00
Greg Johnston
f7489054ba docs: beginning work on router docs (#682) 2023-03-21 17:12:34 -04:00
Elliot Waite
404a64943f examples: remove duplicate console_error_panic_hook::set_once() calls (#692) 2023-03-21 17:12:34 -04:00
Greg Johnston
6d16a3feb5 feat: support diffing inside component children in hot-reload (#690) 2023-03-21 17:12:34 -04:00
Greg Johnston
49932fda39 fix: hydration errors with <Suspense/> inside components in SSR mode (#688) 2023-03-21 17:12:34 -04:00
Vassil "Vasco" Kolarov
50a31977fd examples: added example using Tailwind, CSR (only) and Trunk (#666) 2023-03-21 17:12:34 -04:00
Greg Johnston
7639b941c6 fix: allow multiple <Suspense/> on same page during in-order or async rendering (#687) 2023-03-21 17:12:34 -04:00
ryndin32
9db245dec4 docs: typos (#685) 2023-03-21 17:12:34 -04:00
Brett Etter
de42efab11 Added IntoView for ReadSignal and RwSignal in the stable feature. (#677) 2023-03-21 17:12:34 -04:00
Greg Johnston
12e8428a84 Update README.md 2023-03-21 17:12:34 -04:00
Greg Johnston
f76f027ed5 fix: suppress spurious hydration warnings for tags in leptos_meta (#684) 2023-03-21 17:12:34 -04:00
Greg Johnston
959c99d7d8 fix: leaking stored values (#683) 2023-03-21 17:12:34 -04:00
Greg Johnston
12d4a93ac6 CI: add --release checks (#681) 2023-03-21 17:12:34 -04:00
Greg Johnston
421544cec4 feat: maintain order of sources and dependencies (#678) 2023-03-21 17:12:34 -04:00
Brett Etter
364b20ccce fix: release mode (#679) 2023-03-21 17:12:34 -04:00
Greg Johnston
8b2daf869b feat: new reactive system implementation (#637) 2023-03-21 17:12:34 -04:00
Greg Johnston
56f8f20d4a chore: apply cargo machete systematically (#671) 2023-03-21 17:12:34 -04:00
Greg Johnston
6d9cc626ff feat: <ActionForm/> improvements (#676) 2023-03-21 17:12:34 -04:00
Greg Johnston
633bcc5f5d v0.2.3: fix broken stable support (#670) 2023-03-21 17:12:34 -04:00
Greg Johnston
76a3ce8794 v0.2.2 (#667) 2023-03-21 17:12:34 -04:00
martin frances
ddd446fd16 clippy: signal_wrappers_read, was using .clone() when copy is available. (#665) 2023-03-21 17:12:34 -04:00
Elliot Waite
ab939ccf7f docs: typo fixes and other small changes to the docs (#662) 2023-03-21 17:12:34 -04:00
Greg Johnston
7f34135463 fix: apply patches to all instances of a view, not just the first one (#663) 2023-03-21 17:12:34 -04:00
Greg Johnston
c3c371b020 fix: text node issue in template macro (#661) 2023-03-21 17:12:34 -04:00
Charles Taylor
365ac41cad feat: impl Copy & Clone for MaybeSignal (#660) 2023-03-21 17:12:34 -04:00
Greg Johnston
71164c08aa feat: add fragment support for hot reloading and fix some stuff (#659) 2023-03-21 17:12:34 -04:00
Ben Wishovich
d19902b404 feat: provide Request<_> in context for Axum, enabling easier extractor use (#632) 2023-03-21 17:12:34 -04:00
martin frances
e4589551ca chore: cargo machete: leptos_macro - Removed unused crates. (#656) 2023-03-21 17:12:34 -04:00
Greg Johnston
dba6f9ee22 feat: impl IntoView for &Fragment (#655) 2023-03-21 17:12:34 -04:00
Pikhosh
6f7685ad3e fix: show console error instead warning for error! (#654) 2023-03-21 17:12:34 -04:00
ealmloff
2c944177d4 feat: make server functions work outside of WASM (#643) 2023-03-21 17:12:34 -04:00
Greg Johnston
d6e564105e docs: add create_effect chapter (#653) 2023-03-21 17:12:34 -04:00
zack.shen
35dcd12cfd docs: spelling error (#651) 2023-03-21 17:12:34 -04:00
martin frances
a9ba6ca930 chore: bumped typed-builder up to 0.14. (#648) 2023-03-21 17:12:34 -04:00
martin frances
d63e65cd53 chore: bump bytecheck to 0.7, remove deprecated simdutf8_std. (#647)
* bump bytecheck to 0.7, remove deprecated simdutf8_std.

* When using rkyv, must use the appropiate CheckBytes.
2023-03-21 17:12:34 -04:00
Greg Johnston
6bbbacc7cd chore: typo (closes issue #645) (#646) 2023-03-21 17:12:34 -04:00
Vanius Bittencourt
0746bc433c feat: refactor leptos_config to allow loading from string (#628) 2023-03-21 17:12:34 -04:00
martin frances
9e80837313 chore: cargo machete: Strip down leptos_server. (#644) 2023-03-21 17:12:34 -04:00
martin frances
70c9286626 chore: bump serde-wasm-bindgen to 0.5. (#639) 2023-03-21 17:12:34 -04:00
martin frances
a0e564e9be chore: <Form/> component Removed unused variables. (#640) 2023-03-21 17:12:34 -04:00
martin frances
84e21d58aa Bumped tower-http upto 0.4. (#638) 2023-03-21 17:12:34 -04:00
Greg Johnston
efab33beb1 fix: custom events (closes issue #641) (#642) 2023-03-21 17:12:34 -04:00
jo!
2028a95eed examples: add session_auth_axum (#589) 2023-03-21 17:12:34 -04:00
Greg Johnston
647f62ffa7 CI: split into three actions (#636) 2023-03-21 17:12:34 -04:00
erwanvivien
d5a39037e1 de-duplicate todomvc example (#634) 2023-03-21 17:12:34 -04:00
martin frances
020b793417 bump typed-builder to version 0.13. (#633) 2023-03-21 17:12:34 -04:00
jfloresremar
a7e94e3026 Update 04_iteration.md (#630) 2023-03-21 17:12:34 -04:00
IchHabeKeineNamen
e9541e6f60 docs: fix instruction typos (#631) 2023-03-21 17:12:34 -04:00
Greg Johnston
dbb8e6bde4 fix: boolean attributes in SSR (#629) 2023-03-21 17:12:34 -04:00
WafflePersonThing
b4a0d9363f fix: added missing attributes of events that don't bubble (#625)
references used:
- https://developer.mozilla.org/en-US/docs/Web/API/
- web archives of the above before jun 11th 2022, relevant: https://github.com/mdn/content/issues/19590
2023-03-21 17:12:34 -04:00
Greg Johnston
18caac3b2e feat: hot reloading support for cargo-leptos (#592) 2023-03-21 17:12:34 -04:00
Greg Johnston
091e05e610 docs: add a chapter on async actions and create_action (#623) 2023-03-21 17:12:34 -04:00
Greg Johnston
8f712966e3 CI: exclude rkyv combos with other serialization traits (#622) 2023-03-21 17:12:34 -04:00
Greg Johnston
aeb601f560 fix: suppress warnings caused by resource loading in generate_route_list (closes #582) (#621) 2023-03-21 17:12:34 -04:00
Greg Johnston
86e8fadc6d feat: allow easier client-side form validation (closes #413) (#620) 2023-03-21 17:12:34 -04:00
Greg Johnston
0a3935aa16 docs: add patterns for global state (closes #245) (#619) 2023-03-21 17:12:34 -04:00
Greg Johnston
62ed91c984 tests: use check instead of build in CI for disk space (#616) 2023-03-21 17:12:34 -04:00
Greg Johnston
8ecb63728c feat: allow multiple class names in view! macro class = (closes #612) (#614) 2023-03-21 17:12:34 -04:00
Greg Johnston
fd01a8ce30 docs: improve "Getting Started" page (#618) 2023-03-21 17:12:34 -04:00
Greg Johnston
9338fc4928 add note about running Trunk from root 2023-03-21 17:12:34 -04:00
martin frances
7eed00ae0e chore: clippy - simplified conditional logic in transition.rs. (#615) 2023-03-21 17:12:34 -04:00
Roland Fredenhagen
7911c4b613 feat: support expressions in #[prop(default=...)] (#611) 2023-03-21 17:12:34 -04:00
Ivan Agafonov
65b1518d6b docs: updated error handling code (#610)
code is from already updated example
2023-03-21 17:12:34 -04:00
Sergei Gnezdov
80c2d3ffff docs: fix compilation error, Issue #608 (#609)
Compiler reports error
F may not live long enough
2023-03-21 17:12:34 -04:00
Greg Johnston
e2c0bd1ad8 publish framework-independent server_fn crate (#605) 2023-03-21 17:12:34 -04:00
Ivan Agafonov
9819f28b2c docs: use create_node_ref instead of NodeRef::new (#607)
Code in the example already updated by someone
2023-03-21 17:12:34 -04:00
ealmloff
00730007d0 feat: make server functions framework agnostic (#596) 2023-03-21 17:12:34 -04:00
Greg Johnston
92920c2726 fix: memory leak in streaming SSR (closes issue #590) (#601) 2023-03-21 17:12:34 -04:00
Qwox
30a858defe fix: set new value before resetting input (#604)
Co-authored-by: Qwox <qwox@qwox.com>
2023-03-21 17:12:34 -04:00
Artem Makoven
1d6bf78b93 Fix typo in 03_components.md 2023-03-21 17:12:34 -04:00
Ivan Agafonov
d26fa60268 typo
_cx replaced with cx
2023-03-21 17:12:34 -04:00
Greg Johnston
4a685bfcdd fix SSR tests 2023-03-21 17:12:34 -04:00
Greg Johnston
2fadd92856 fix: don't re-set attributes found in HTML during hydration (closes #597) 2023-03-21 17:12:34 -04:00
Greg Johnston
19d2a1dfa7 fix: restore SSR fast-path support 2023-03-21 17:12:34 -04:00
Greg Johnston
6c86700666 examples: include missing examples in CI (#598) 2023-03-21 17:12:34 -04:00
Brendon Otto
6cb378e02a example: update README.md (#595)
Incorrect framework referenced
2023-03-21 17:12:34 -04:00
Greg Johnston
2b68fa6bc0 fix: mouseenter and mouseleave do not bubble (#593) 2023-03-21 17:12:34 -04:00
Thomas Kratz
c18847eb55 fix: make counter test compile (#588) 2023-03-21 17:12:34 -04:00
Azz
d851803f13 feat: support rkyv encoding (#577) 2023-03-21 17:12:34 -04:00
Greg Johnston
c122bbf9fa perf: improvements to event delegation and element creation in <For/> (#579) 2023-03-21 17:12:34 -04:00
g-re-g
ac8201877a fix: correct scheme handling in router, and improve matching code by removing regexes (#569) 2023-03-21 17:12:34 -04:00
Greg Johnston
0bc02df77f v0.2.0 2023-03-21 17:12:34 -04:00
tanguy-lf
d210d53f48 examples: add ssr_mode_axum (#575) 2023-03-21 17:12:34 -04:00
Greg Johnston
6b6782e8b0 fix: <Transition/> with local_resource (closes #562) (#574) 2023-03-21 17:12:34 -04:00
Markus Kohlhase
bf06b63779 example: Login with API token (CSR only) (#523) 2023-03-21 17:12:34 -04:00
Remo
409ffdd85f chore: macro panic hygiene (#568) 2023-03-21 17:12:34 -04:00
SleeplessOne1917
9bb5fc9965 fix: <Meta/> component as_ property outputs correct attribute html (#573) 2023-03-21 17:12:34 -04:00
Denis Nazarov
5a8039b68d Relax Eq to PartialEq for create_slice() (#570)
Co-authored-by: Denis Nazarov <denis.nazarov@gmail.com>
2023-03-21 17:12:34 -04:00
Greg Johnston
4c57ba4518 fixes issue #565 (#566) 2023-03-21 17:12:33 -04:00
Greg Johnston
ac6013efcc fix: transition fallback (closes #562) (#563) 2023-03-21 17:12:33 -04:00
Fangdun Tsai
3c3282887a feat: viz integration (#506) 2023-03-21 17:12:33 -04:00
PolarMutex
f829d6412e feature: add class prop to <Html/> component (#554) 2023-03-21 17:12:33 -04:00
Greg Johnston
bbafdbdb08 fix: issue with local resources blocking <Suspense/> fragments from resolving (#561) 2023-03-21 17:12:33 -04:00
Greg Johnston
f1d7ab0e75 fix: remove unnecessary log (#560) 2023-03-21 17:12:33 -04:00
Greg Johnston
98a4e87830 docs: add create_resource, <Suspense/>, and <Transition/> (#559) 2023-03-21 17:12:33 -04:00
Greg Johnston
4f524a57d8 docs: add example of <ButtonC on:click/> syntax (#558) 2023-03-21 17:12:33 -04:00
Thomas Versteeg
229b08084b doc: fix button name in parent_child example (#555) 2023-03-21 17:12:33 -04:00
Greg Johnston
d483d09300 v0.2.0-beta (#557) 2023-03-21 17:12:33 -04:00
Ben Wishovich
4a0e60ec42 fix issue with redirects in server fns creating multiple Location headers (#550) 2023-03-21 17:12:33 -04:00
Ikko Eltociear Ashimine
f0767cb76c fix: typo in hydration docs(#552)
identifer -> identifier
2023-03-21 17:12:33 -04:00
Chrislearn Young
0ca96d1bfe fix: document docs typo (#553) 2023-03-21 17:12:33 -04:00
Greg Johnston
8566725347 change: pass Scope as argument into Resource::read() and Resource::with() (#542) 2023-03-21 17:12:33 -04:00
Greg Johnston
2df349afd6 fix: more work on hydration IDs with <Suspense/> (#545) 2023-03-21 17:12:33 -04:00
Greg Johnston
7092bf5a6d revert PR #538 (#544) 2023-03-21 17:12:33 -04:00
Greg Johnston
26df094513 revert accident 2023-03-21 17:12:33 -04:00
Greg Johnston
3e95440b2d fix example 2023-03-21 17:12:33 -04:00
Dmitrii Kuzmin
bfa6cb0a78 fix(examples): hackernews_axum styles href (#536) 2023-03-21 17:12:33 -04:00
jquesada2016
149a377497 fix: off-by-one error in <For/> (closes #533) (#538) 2023-03-21 17:12:33 -04:00
Greg Johnston
6ae08493b3 fix: building leptos_reactive in release mode (#540) 2023-03-21 17:12:33 -04:00
Greg Johnston
858db3a792 v0.2.0-alpha2 (#539) 2023-03-21 17:12:33 -04:00
jquesada2016
10a2d27599 change: move signal method implementations into traits in signal prelude (#490) 2023-03-21 17:12:33 -04:00
Sean Aye
757f6231ef fix compile of leptos dom (#535) 2023-03-21 17:12:33 -04:00
Greg Johnston
042cf7614e feature: in-order streaming and async rendering (#496) 2023-03-21 17:12:33 -04:00
Greg Johnston
d8b02a1369 Fix test import location 2023-03-21 17:12:33 -04:00
Greg Johnston
427aa3f4c6 What's in a name? 2023-03-21 17:12:33 -04:00
Greg Johnston
b81592cf34 fix: hydration IDs for elements following <Suspense/> (closes #527) (#531) 2023-03-21 17:12:33 -04:00
Greg Johnston
a7d28e233b feature: reintroduce limited template-node cloning w/ template macro (#526) 2023-03-21 17:12:33 -04:00
Greg Johnston
7aed95b29b fix: top-level SVG in view macro with new exports (#525) 2023-03-21 17:12:33 -04:00
Greg Johnston
d90061f28e change: tweak API of Errors and implement IntoIter (#522) 2023-03-21 17:12:33 -04:00
henrik
d9cfcdad7c feature: enable cargo-leptos to reload multiple CSS files (#524) 2023-03-21 17:12:33 -04:00
Greg Johnston
dce7baaea0 Reexport web-sys event types in leptos::ev to make it easier to type handlers (#521) 2023-03-21 17:12:33 -04:00
Greg Johnston
f6145e8f65 fix: correct namespace for Unit in empty views (closes #518) (#520) 2023-03-21 17:12:33 -04:00
martin frances
7a93c3d3db leptos_dom erros.rs remove<E>() does not need to be generic. (#516)
* leptos_dom erros.rs remove<E>() does not need to be generic.

* fixed up errors.remove().
2023-03-21 17:12:33 -04:00
Greg Johnston
af4ae39a08 0.2.0-alpha (#515) 2023-03-21 17:12:33 -04:00
Greg Johnston
6ab2fef787 remove .unwrap() from redirect in Actix integration (#514) 2023-03-21 17:12:33 -04:00
IcosaHedron
0eaadaf391 do not unwrap use_context in integrations axum redirect (#513) 2023-03-21 17:12:33 -04:00
Greg Johnston
2a0ba3d884 CI: fix Wasm testing (#511) 2023-03-21 17:12:33 -04:00
Greg Johnston
02badcd23f fix: SSR export in Wasm mode (#512) 2023-03-21 17:12:33 -04:00
Greg Johnston
e4863bdba0 fix: import in leptos_dom and add Wasm build to CI for regressions (#510) 2023-03-21 17:12:33 -04:00
g-re-g
e601ab4949 Typos and a small cleanup (#509) 2023-03-21 17:12:33 -04:00
Greg Johnston
7362e1878a change: reorganize module exports and reexports (#503) 2023-03-21 17:12:33 -04:00
Greg Johnston
f8e84657b7 Add docs on testing (closes #489) (#508) 2023-03-21 17:12:33 -04:00
Greg Johnston
615ae14eec fix: <For/> in todomvc example (#504) 2023-03-21 17:12:33 -04:00
Greg Johnston
2f7c192835 docs: further additions (#505) 2023-03-21 17:12:33 -04:00
Greg Johnston
cbead2f02a apply new formatting everywhere (#502) 2023-03-21 17:12:33 -04:00
jquesada2016
517f4d423f chore: add workspace rustfmt.tml (#483) 2023-03-21 17:12:33 -04:00
Greg Johnston
7a88eae100 fix: proper disposal of nested route scopes (#499) 2023-03-21 17:12:33 -04:00
g-re-g
dbcfb023fc Allow literal string as class in view macro (#500) 2023-03-21 17:12:33 -04:00
Greg Johnston
10af646f37 examples: remove unused index.html (#497) 2023-03-21 17:12:33 -04:00
martin frances
03b7bd890a chore: remove unused .clone() call in <Suspense/>. (#486) 2023-03-21 17:12:33 -04:00
Greg Johnston
19985204c9 Handle <ErrorBoundary/> hydration correctly (closes #456) 2023-03-21 17:12:33 -04:00
Greg Johnston
c4364fa6d3 Correctly handle custom elements in SSR 2023-03-21 17:12:33 -04:00
Greg Johnston
2b6c8bbbfb Add error boundary example to list 2023-03-21 17:12:33 -04:00
Greg Johnston
ff67f64bcc Basic error boundary example 2023-03-21 17:12:33 -04:00
Greg Johnston
5a3bd9484c Update README.md 2023-03-21 17:12:33 -04:00
Greg Johnston
5c80182498 change: add Scope to view function in <For/> to avoid memory "leak" (#492) 2023-03-21 17:12:33 -04:00
Greg Johnston
475265acf8 missing ; 2023-03-21 17:12:33 -04:00
Greg Johnston
619260cf45 fix: fix debug_warn behavior in reactive crate and remove log dependency (#491) 2023-03-21 17:12:33 -04:00
jquesada2016
7e89eac267 change: NodeRef<HtmlElement<Div>> generics to NodeRef<Div> (#481) 2023-03-21 17:12:33 -04:00
Greg Johnston
17ee674b5c fix: typed route params with #[derive(Params)] (#488) 2023-03-21 17:12:33 -04:00
Greg Johnston
97ff7aa4f9 Fix inner_html in SSR (#487) 2023-03-21 17:12:33 -04:00
martin frances
3b0625f457 Minor: Clippy router now uses types OnFormData and OnResponse. (#484) 2023-03-21 17:12:33 -04:00
Greg Johnston
34c8a5b49a fix: errors on 404 page in axum_errors example (#485) 2023-03-21 17:12:33 -04:00
Jan
b51885e014 Better styling for router related components (#477) 2023-03-21 17:12:33 -04:00
Greg Johnston
4bc23f2828 remove unnecessary "openssl" feature from Actix examples (#480) 2023-03-21 17:12:33 -04:00
Greg Johnston
cca606527f Create README.md 2023-03-21 17:12:33 -04:00
Greg Johnston
93e0fc9379 docs: (in-progress) new tutorial/guide format with integrated CodeSandboxes (#375) 2023-03-21 17:12:33 -04:00
Greg Johnston
af0efa03ce Remove old book 2023-03-21 17:12:33 -04:00
Greg Johnston
24f4cecfbb fix: adding/removing errors from <ErrorBoundary/> (#478) 2023-03-21 17:12:33 -04:00
Greg Johnston
3d29fbc1ce fix: cargo doc in projects using #[server] (#476) 2023-03-21 17:12:33 -04:00
Greg Johnston
935d266f55 fix: correct out-of-order streaming behavior (#475) 2023-03-21 17:12:33 -04:00
g-re-g
b3369c6699 impl From<&str> for MaybeSignal<String> (#472) 2023-03-21 17:12:33 -04:00
Ben Wishovich
38a175a744 fix: convert site_address to site_addr to match cargo-leptos (#462) 2023-03-21 17:12:33 -04:00
Greg Johnston
edeb1dcf1e fix: fix node_ref in SSR (#471) 2023-03-21 17:12:33 -04:00
Greg Johnston
bd2baef127 fix: don't override element event listeners with component event listeners (closes #461) (#470) 2023-03-21 17:12:33 -04:00
Roland Fredenhagen
becf8a00cc error on non meta input for prop attribute (#469) 2023-03-21 17:12:33 -04:00
John Funk
b9a706a2bd Add simple icon logo (#468) 2023-03-21 17:12:33 -04:00
Greg Johnston
9ede00ca5d feature: add isomorphic <Redirect/> component (closes #412) (#466) 2023-03-21 17:12:33 -04:00
Roland Fredenhagen
381083121e impl Default for MaybeSignal (#464) 2023-03-21 17:12:33 -04:00
Greg Johnston
530f552616 docs: note about optional fallback (closes #406) (#463) 2023-03-21 17:12:33 -04:00
Jan
d092cdbaae Do it on an other branch (#460) 2023-03-21 17:12:33 -04:00
Greg Johnston
3fda12267f perf: further reduce WASM binary size by ~5-7% (#459)
* Update `leptos_router` docs
* Further reducing WASM bundle sizes
2023-03-21 17:12:33 -04:00
g-re-g
725954f784 Derive debug in server macro (#458) 2023-03-21 17:12:33 -04:00
Greg Johnston
4cb39d4bef docs: add new Children types to macro docs (#454) 2023-03-21 17:12:33 -04:00
Odiseo
c876cc9d65 fix: typo in leptos_config description (#455) 2023-03-21 17:12:33 -04:00
Greg Johnston
bc52e7e106 fix: stack overflow in with nested outlet (closes #452) (#453) 2023-03-21 17:12:33 -04:00
martin frances
0fc1ec1c94 Clippy: "{input} is not a supported environment. (#451) 2023-03-21 17:12:33 -04:00
Greg Johnston
eaf955b3ea fix: leptos_router hydration issues (#450) 2023-03-21 17:12:33 -04:00
Tobias Goulden Schultz
248a992ea2 fix: update leptos dependencies to point to the same workspace as other examples (#449) 2023-03-21 17:12:33 -04:00
Greg Johnston
35296b057f feature: allow on: event listeners on <Component/> nodes (#448) 2023-03-21 17:12:32 -04:00
Greg Johnston
850b129a0c fix: successfully pass context to nested routes via <Outlet/> (#447) 2023-03-21 17:12:32 -04:00
Gentle
fe3ce84200 use latest tokio in leptos_axum (#443) 2023-03-21 17:12:32 -04:00
martin frances
f7efd4d4ef router: Machete - Removed unused deps. (#442) 2023-03-21 17:12:32 -04:00
martin frances
d07d836ecb leptos_macro: Machete - Removed unused deps. (#441) 2023-03-21 17:12:32 -04:00
martin frances
b4a0fe85aa leptos-server: Removed dependecy on log, linear-map, rmp-serde. (#439) 2023-03-21 17:12:32 -04:00
g-re-g
bec11fead9 Dedup from_str implementations for Env (#426) 2023-03-21 17:12:32 -04:00
Greg Johnston
8eb60a2197 fix: correct behavior of <Show/> so it renders correctly when toggling between conditions multiple times, without rerendering on every change (#436) 2023-03-21 17:12:32 -04:00
Greg Johnston
21ddad1411 Fix top-level SVG elements in SSR (#435) 2023-03-21 17:12:32 -04:00
Greg Johnston
459fe54f55 Switch examples to check instead of build (for CI resources) and add missing examples (#437) 2023-03-21 17:12:32 -04:00
Greg Johnston
eb84f198af docs: Document inner_html attribute (#429) 2023-03-21 17:12:32 -04:00
Greg Johnston
b6bc7a070d Make RouteDefinition public (#430) 2023-03-21 17:12:32 -04:00
IcosaHedron
760a3574d0 Several Minor Updates on Examples (#427) 2023-03-21 17:12:32 -04:00
jquesada2016
a4c3292215 fixes cx not found on components marked with #[component(transparent)] (#423) 2023-03-21 17:12:32 -04:00
Greg Johnston
8670a36eeb fix: Make all fragment rendering lazy (closes #299 and #421) (#425)
Make all fragment rendering lazy (closes #299 and #421)
2023-03-21 17:12:32 -04:00
Greg Johnston
e5adb2ef0c fix: HTML entity issues in axum_errors example (#424) 2023-03-21 17:12:32 -04:00
Ben Wishovich
0378e0b077 Update ErrorBoundary to use miette::Diagnostic instead of Error, and various other tweaks (#401)
* Switch RwLock to parking_lot so they are no longer async
* cleanup todo_app_sqlite_axum
* add errors_axum example

---------

Co-authored-by: Indrazar <110272232+Indrazar@users.noreply.github.com>
2023-03-21 17:12:32 -04:00
starmaker
7301a24918 Implemented update_returning for StoredValue (#419) 2023-03-21 17:12:32 -04:00
Greg Johnston
f15f2365ac Fix issues with attribute names in SSR (#418) 2023-03-21 17:12:32 -04:00
Bruno De Simone
910aa6d993 Add leptos_routes functions for integrations (#415)
* added leptos_routes_with_context

* added leptos_routes_with_handler for axum integration
2023-03-21 17:12:32 -04:00
Ben Wishovich
9c9218c346 Switch RwLock to parking_lot so they are no longer async (#414) 2023-03-21 17:12:32 -04:00
Greg Johnston
9c55b35f6a Fix <option> and <use> top-level types in SSR (#416) 2023-03-21 17:12:32 -04:00
martin frances
05b1ce50d9 Escape <HTML> and <BODY> tokens in documentation markup. (#410) 2023-03-21 17:12:32 -04:00
martin frances
ed4815dd0e Minor: Bump typed-builder from 0.11 to 0.12. (#409) 2023-03-21 17:12:32 -04:00
Greg Johnston
db3c041e2f Add <Html/> and <Body/> components in leptos_meta (#407)
Closes #376.
2023-03-21 17:12:32 -04:00
Greg Johnston
d7c5cd8f27 oops 2023-03-21 17:12:32 -04:00
Greg Johnston
1c235e75df escape attributes 2023-03-21 17:12:32 -04:00
Greg Johnston
5c2381c675 Fixes boolean attributes in SSR (closes #405) 2023-03-21 17:12:32 -04:00
Greg Johnston
0e0fbf43f4 Revert "fix: Fixes boolean attributes in HTML fast-path (closes issue #405)"
This reverts commit 2ecb345a79.
2023-03-21 17:12:32 -04:00
Greg Johnston
0952dcd2d3 fix: Fixes boolean attributes in HTML fast-path (closes issue #405) 2023-03-21 17:12:32 -04:00
Greg Johnston
78d884db00 Add Children type alias 2023-03-21 17:12:32 -04:00
Greg Johnston
c8ff557a1c Fix labels in parent_child README 2023-03-21 17:12:32 -04:00
Greg Johnston
5e469039eb 0.1.3 2023-03-21 17:12:32 -04:00
Greg Johnston
00782697ef Missing web-sys types 2023-03-21 17:12:32 -04:00
Greg Johnston
6ad325fc6b Fix <ErrorBoundary/> removal behavior 2023-03-21 17:12:32 -04:00
Greg Johnston
a16becddcd Docs for <Show/> component 2023-03-21 17:12:32 -04:00
Greg Johnston
487a87ce49 Docs for <ErrorBoundary/> 2023-03-21 17:12:32 -04:00
Greg Johnston
e7184ee3f3 Fix hydration issue related to WASM size reduction 2023-03-21 17:12:32 -04:00
Greg Johnston
f46106e606 cargo fmt 2023-03-21 17:12:32 -04:00
Greg Johnston
1f5f8c03c2 clippy stuff 2023-03-21 17:12:32 -04:00
Greg Johnston
2a4c3f00d8 Make helpers into concrete functions for WASM binary size purposes 2023-03-21 17:12:32 -04:00
Greg Johnston
12affc3d98 Use a concrete helper function to generate elements 2023-03-21 17:12:32 -04:00
Thomas Queiroz
d923bf868a Fix gtk example 2023-03-21 17:12:32 -04:00
Greg Johnston
301e4d8288 Missing Storage dependency (now that gloo is gone) 2023-03-21 17:12:32 -04:00
Greg Johnston
fd2a074693 Remove gloo dependency in leptos_dom 2023-03-21 17:12:32 -04:00
Martin
9416517e0e BugFix, ch03 properly construct the "input_element". 2023-03-21 17:12:32 -04:00
Martin
b5a9131c8e doc/book updated leptos version. 2023-03-21 17:12:32 -04:00
Greg Johnston
a8d6b9aca3 Correctly set pending state with ActionForm 2023-03-21 17:12:32 -04:00
Greg Johnston
8db98f26d2 ActionForm should clear input as Action::dispatch() does 2023-03-21 17:12:32 -04:00
Greg Johnston
50eff91072 Fix missing docs error (#389) 2023-03-21 17:12:32 -04:00
Greg Johnston
7d6e3c99bc Check uniqueness of server function names at registration time (#388)
* Check uniqueness of server function names at registration time, and stop leaking src file path in release mode

* Fix missing dev-dependency
2023-03-21 17:12:32 -04:00
Greg Johnston
283dfdd075 Fix a large number of small issues in docs (#386)
* Fix example links in docs

* Restore missing CSR READMEs

* Document need to enable features on `leptos_router` and `leptos_meta`

* Add "Is it production ready?" to FAQs

* Document which types are provided as contexts in server integrations

* Fix broken links and other issues in docs
2023-03-21 17:12:32 -04:00
Greg Johnston
eaeca26d12 Allow unused cx in server fn arguments (#385)
* Suppress warning for unused `cx` in server function arguments
2023-03-21 17:12:32 -04:00
Greg Johnston
c939182c68 implements From<Signal<T>> for MaybeSignal<T> (#384) 2023-03-21 17:12:32 -04:00
Greg Johnston
a496f3c5a9 Replace site-address with site-addr in cargo-leptos example Cargo.toml files 2023-03-21 17:12:32 -04:00
Gentle
b6a8171f4c leptos_axum::handle_server_fns was also duplicated (#383) 2023-03-21 17:12:32 -04:00
Roland Fredenhagen
aff190d41b added hgroup element (#379) 2023-03-21 17:12:32 -04:00
Gentle
88e98c0f7e cloning is not needed here (#381) 2023-03-21 17:12:32 -04:00
Gentle
ac92b63e4c refactor to eliminate duplicate code (#380) 2023-03-21 17:12:32 -04:00
Greg Johnston
5b116596bf Fix context in outlets (#374)
* Add `Scope::parent()` to make access to parent `Scope` possible.

* Handle context properly in nested routes
2023-03-21 17:12:32 -04:00
Markus Kohlhase
8e2d5598b5 Add a counter example that does not use macros (#373) 2023-03-21 17:12:32 -04:00
Ben Wishovich
4023e16507 Make Errors Sync (#372) 2023-03-21 17:12:32 -04:00
IcosaHedron
d4da935a0c Fix CSR with Trunk on hackernews example, remove CSR option from isomorphic example (#369)
* Fix CSR with Trunk on hackernews example

* Update isomorphic example to remove CSR from Readme
2023-03-21 17:12:32 -04:00
Markus Kohlhase
1d5ed41e1d Replace urlencoding with percent-encoding (#365)
Motivation: `percent-encoding` is from the Servo team and part of the `url` crate.
2023-03-21 17:12:32 -04:00
Ben Wishovich
22b8640b37 Add <Show/> component to avoid rerendering of closures and tweak ErrorBoundary (#363)
Add once_cell to leptos, and add Show component! Modify ErrorBoundary to
take a closure that implements IntoView, not View
2023-03-21 17:12:32 -04:00
Greg Johnston
e5998eb321 Reorganize docs re: snake-case names 2023-01-23 09:09:35 -05:00
Greg Johnston
65b0e1265b clippy 2023-01-23 09:09:26 -05:00
260 changed files with 2954 additions and 10685 deletions

View File

@@ -42,4 +42,4 @@ jobs:
- uses: Swatinem/rust-cache@v2
- name: Run cargo check on all examples
run: cargo make --profile=github-actions check-stable
run: cargo make check-stable

View File

@@ -42,4 +42,4 @@ jobs:
- uses: Swatinem/rust-cache@v2
- name: Run cargo check on all libraries
run: cargo make --profile=github-actions check
run: cargo make check

View File

@@ -1,37 +0,0 @@
name: Deploy book
on:
push:
paths: ['docs/book/**']
branches:
- main
jobs:
deploy:
runs-on: ubuntu-latest
permissions:
contents: write # To push a branch
pull-requests: write # To create a PR from that branch
steps:
- uses: actions/checkout@v3
with:
fetch-depth: 0
- name: Install mdbook
run: |
mkdir mdbook
curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.27/mdbook-v0.4.27-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=./mdbook
echo `pwd`/mdbook >> $GITHUB_PATH
- name: Deploy GitHub Pages
run: |
cd docs/book
mdbook build
git worktree add gh-pages
git config user.name "Deploy book from CI"
git config user.email ""
cd gh-pages
# Delete the ref to avoid keeping history.
git update-ref -d refs/heads/gh-pages
rm -rf *
mv ../book/* .
git add .
git commit -m "Deploy book $GITHUB_SHA to gh-pages"
git push --force --set-upstream origin gh-pages

View File

@@ -42,4 +42,4 @@ jobs:
- uses: Swatinem/rust-cache@v2
- name: Run tests with all features
run: cargo make --profile=github-actions test
run: cargo make test

2
.gitignore vendored
View File

@@ -7,5 +7,3 @@ Cargo.lock
**/*.rs.bk
.DS_Store
.idea
.direnv
.envrc

View File

@@ -25,22 +25,22 @@ members = [
exclude = ["benchmarks", "examples"]
[workspace.package]
version = "0.3.0-alpha"
version = "0.2.4"
[workspace.dependencies]
leptos = { path = "./leptos", default-features = false, version = "0.3.0-alpha" }
leptos_dom = { path = "./leptos_dom", default-features = false, version = "0.3.0-alpha" }
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.3.0-alpha" }
leptos_macro = { path = "./leptos_macro", default-features = false, version = "0.3.0-alpha" }
leptos_reactive = { path = "./leptos_reactive", default-features = false, version = "0.3.0-alpha" }
leptos_server = { path = "./leptos_server", default-features = false, version = "0.3.0-alpha" }
server_fn = { path = "./server_fn", default-features = false, version = "0.3.0-alpha" }
server_fn_macro = { path = "./server_fn_macro", default-features = false, version = "0.3.0-alpha" }
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", default-features = false, version = "0.3.0-alpha" }
leptos_config = { path = "./leptos_config", default-features = false, version = "0.3.0-alpha" }
leptos_router = { path = "./router", version = "0.3.0-alpha" }
leptos_meta = { path = "./meta", default-features = false, version = "0.3.0-alpha" }
leptos_integration_utils = { path = "./integrations/utils", version = "0.3.0-alpha" }
leptos = { path = "./leptos", default-features = false, version = "0.2.4" }
leptos_dom = { path = "./leptos_dom", default-features = false, version = "0.2.4" }
leptos_hot_reload = { path = "./leptos_hot_reload", version = "0.2.4" }
leptos_macro = { path = "./leptos_macro", default-features = false, version = "0.2.4" }
leptos_reactive = { path = "./leptos_reactive", default-features = false, version = "0.2.4" }
leptos_server = { path = "./leptos_server", default-features = false, version = "0.2.4" }
server_fn = { path = "./server_fn", default-features = false, version = "0.2.4" }
server_fn_macro = { path = "./server_fn_macro", default-features = false, version = "0.2.4" }
server_fn_macro_default = { path = "./server_fn/server_fn_macro_default", default-features = false, version = "0.2.4" }
leptos_config = { path = "./leptos_config", default-features = false, version = "0.2.4" }
leptos_router = { path = "./router", version = "0.2.4" }
leptos_meta = { path = "./meta", default-feature = false, version = "0.2.4" }
leptos_integration_utils = { path = "./integrations/utils", version = "0.2.4" }
[profile.release]
codegen-units = 1

View File

@@ -49,7 +49,6 @@ dependencies = [
{ 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" },
@@ -69,42 +68,9 @@ dependencies = [
[tasks.test]
clear = true
dependencies = ["test-all", "test-leptos_macro-example", "doc-leptos_macro-example"]
dependencies = ["test-all"]
[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", "test-unit-and-web"]
[tasks.verify-examples]
description = "Run all quality checks and tests for examples"
cwd = "examples"
command = "cargo"
args = ["make", "verify-flow"]
[env]
RUSTFLAGS = ""
LEPTOS_OUTPUT_NAME="ci" # allows examples to check/build without cargo-leptos
[env.github-actions]
RUSTFLAGS = "-D warnings"

View File

@@ -6,7 +6,6 @@
[![crates.io](https://img.shields.io/crates/v/leptos.svg)](https://crates.io/crates/leptos)
[![docs.rs](https://docs.rs/leptos/badge.svg)](https://docs.rs/leptos)
[![Discord](https://img.shields.io/discord/1031524867910148188?color=%237289DA&label=discord)](https://discord.gg/YdRAhS7eQB)
[![Matrix](https://img.shields.io/badge/Matrix-leptos-grey?logo=matrix&labelColor=white&logoColor=black)](https://matrix.to/#/#leptos:matrix.org)
# Leptos
@@ -25,7 +24,8 @@ pub fn SimpleCounter(cx: Scope, initial_value: i32) -> impl IntoView {
let increment = move |_| set_value.update(|value| *value += 1);
// create user interfaces with the declarative `view!` macro
view! { cx,
view! {
cx,
<div>
<button on:click=clear>"Clear"</button>
<button on:click=decrement>"-1"</button>
@@ -48,27 +48,27 @@ Leptos is a full-stack, isomorphic Rust web framework leveraging fine-grained re
## What does that mean?
- **Full-stack**: Leptos can be used to build apps that run in the browser (client-side rendering), on the server (server-side rendering), or by rendering HTML on the server and then adding interactivity in the browser (server-side rendering with hydration). This includes support for HTTP streaming of both data ([`Resource`s](https://docs.rs/leptos/latest/leptos/struct.Resource.html)) and HTML (out-of-order or in-order streaming of [`<Suspense/>`](https://docs.rs/leptos/latest/leptos/fn.Suspense.html) components.)
- **Isomorphic**: Leptos provides primitives to write isomorphic [server functions](https://docs.rs/leptos_server/0.2.5/leptos_server/index.html), i.e., functions that can be called with the “same shape” on the client or server, but only run on the server. This means you can write your server-only logic (database requests, authentication etc.) alongside the client-side components that will consume it, and call server functions as if they were running in the browser, without needing to create and maintain a separate REST or other API.
- **Web**: Leptos is built on the Web platform and Web standards. The [router](https://docs.rs/leptos_router/latest/leptos_router/) is designed to use Web fundamentals (like links and forms) and build on top of them rather than trying to replace them.
- **Full-stack**: Leptos can be used to build apps that run in the browser (_client-side rendering_), on the server (_server-side rendering_), or by rendering HTML on the server and then adding interactivity in the browser (_hydration_). This includes support for _HTTP streaming_ of both data (`Resource`s) and HTML (out-of-order streaming of `<Suspense/>` components.)
- **Isomorphic**: Leptos provides primitives to write isomorphic server functions, i.e., functions that can be called with the “same shape” on the client or server, but only run on the server. This means you can write your server-only logic (database requests, authentication etc.) alongside the client-side components that will consume it, and call server functions as if they were running in the browser.
- **Web**: Leptos is built on the Web platform and Web standards. The router is designed to use Web fundamentals (like links and forms) and build on top of them rather than trying to replace them.
- **Framework**: Leptos provides most of what you need to build a modern web app: a reactive system, templating library, and a router that works on both the server and client side.
- **Fine-grained reactivity**: The entire framework is built from reactive primitives. This allows for extremely performant code with minimal overhead: when a reactive signals value changes, it can update a single text node, toggle a single class, or remove an element from the DOM without any other code running. (So, no virtual DOM overhead!)
- **Fine-grained reactivity**: The entire framework is built from reactive primitives. This allows for extremely performant code with minimal overhead: when a reactive signals value changes, it can update a single text node, toggle a single class, or remove an element from the DOM without any other code running. (_So, no virtual DOM!_)
- **Declarative**: Tell Leptos how you want the page to look, and let the framework tell the browser how to do it.
## Learn more
Here are some resources for learning more about Leptos:
- [Book](https://leptos-rs.github.io/leptos/) (work in progress)
- [Examples](https://github.com/leptos-rs/leptos/tree/main/examples)
- [API Documentation](https://docs.rs/leptos/latest/leptos/)
- [Common Bugs](https://github.com/leptos-rs/leptos/tree/main/docs/COMMON_BUGS.md) (and how to fix them!)
- Leptos Guide (in progress)
## `nightly` Note
Most of the examples assume youre using `nightly` version of Rust. For this, you can either set your toolchain globally or on per-project basis.
Most of the examples assume youre using `nightly` Rust.
To set `nightly` as a default toolchain for all projects (and add the ability to compile Rust to WebAssembly, if you havent already):
To set up your Rust toolchain using `nightly` (and add the ability to compile Rust to WebAssembly, if you havent already)
```
rustup toolchain install nightly
@@ -76,14 +76,6 @@ rustup default nightly
rustup target add wasm32-unknown-unknown
```
If you'd like to use `nightly` only in your Leptos project however, add [`rust-toolchain.toml`](https://rust-lang.github.io/rustup/overrides.html#the-toolchain-file) file with the following content:
```toml
[toolchain]
channel = "nightly"
targets = ["wasm32-unknown-unknown"]
```
If youre on `stable`, note the following:
1. You need to enable the `"stable"` flag in `Cargo.toml`: `leptos = { version = "0.2", features = ["stable"] }`
@@ -94,7 +86,7 @@ If youre on `stable`, note the following:
## `cargo-leptos`
[`cargo-leptos`](https://github.com/leptos-rs/cargo-leptos) is a build tool that's designed to make it easy to build apps that run on both the client and the server, with seamless integration. The best way to get started with a real Leptos project right now is to use `cargo-leptos` and our starter templates for [Actix](https://github.com/leptos-rs/start) or [Axum](https://github.com/leptos-rs/start-axum).
[`cargo-leptos`](https://github.com/leptos-rs/cargo-leptos) is a build tool that's designed to make it easy to build apps that run on both the client and the server, with seamless integration. The best way to get started with a real Leptos project right now is to use `cargo-leptos` and our [starter template](https://github.com/leptos-rs/start).
```bash
cargo install cargo-leptos
@@ -103,13 +95,13 @@ cd [your project name]
cargo leptos watch
```
Open browser to [http://localhost:3000/](http://localhost:3000/).
Open browser on [http://localhost:3000/](http://localhost:3000/)
## FAQs
### Whats up with the name?
_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.
*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?
@@ -117,7 +109,7 @@ People usually mean one of three things by this question.
1. **Are the APIs stable?** i.e., will I have to rewrite my whole app from Leptos 0.1 to 0.2 to 0.3 to 0.4, or can I write it now and benefit from new features and updates as new versions come?
The APIs are basically settled. Were adding new features, but were very happy with where the type system and patterns have landed. I would not expect major breaking changes to your code to adapt to future releases. The sorts of breaking changes that we discuss are things like “Oh yeah, that function should probably take `cx` as its argument...” not major changes to the way you write your application.
With 0.1 the APIs are basically settled. Were adding new features, but were very happy with where the type system and patterns have landed. I would not expect major breaking changes to your code to adapt to, for example, a 0.2.0 release.
2. **Are there bugs?**
@@ -127,7 +119,7 @@ Yes, Im sure there are. You can see from the state of our issue tracker over
This may be the big one: “production ready” implies a certain orientation to a library: that you can basically use it, without any special knowledge of its internals or ability to contribute. Everyone has this at some level in their stack: for example I (@gbj) dont have the capacity or knowledge to contribute to something like `wasm-bindgen` at this point: I simply rely on it to work.
There are several people in the community using Leptos right now for internal apps at work, who have also become significant contributors. I think this is the right level of production use for now. There may be missing features that you need, and you may end up building them! But for internal apps, if youre willing to build and contribute missing pieces along the way, the framework is definitely usable right now.
There are several people in this community using Leptos right now for internal apps at work, who have also become significant contributors. I think this is the right level of production use for now. There may be missing features that you need, and you may end up building them! But for internal apps, if youre willing to build and contribute missing pieces along the way, the framework is definitely usable right now.
### Can I use this for native GUI?
@@ -145,8 +137,8 @@ I've put together a [very simple GTK example](https://github.com/leptos-rs/lepto
On the surface level, these libraries may seem similar. Yew is, of course, the most mature Rust library for web UI development and has a huge ecosystem. Dioxus is similar in many ways, being heavily inspired by React. Here are some conceptual differences between Leptos and these frameworks:
- **VDOM vs. fine-grained:** Yew is built on the virtual DOM (VDOM) model: state changes cause components to re-render, generating a new virtual DOM tree. Yew diffs this against the previous VDOM, and applies those patches to the actual DOM. Component functions rerun whenever state changes. Leptos takes an entirely different approach. Components run once, creating (and returning) actual DOM nodes and setting up a reactive system to update those DOM nodes.
- **Performance:** This has huge performance implications: Leptos is simply much faster at both creating and updating the UI than Yew is. (Dioxus has made huge advances in performance with its recent 0.3 release, and is now roughly on par with Leptos.)
- **Mental model:** Adopting fine-grained reactivity also tends to simplify the mental model. There are no surprising component re-renders because there are no re-renders. You can call functions, create timeouts, etc. within the body of your component functions because they wont be re-run. You dont need to think about manual dependency tracking for effects; fine-grained reactivity tracks dependencies automatically.
- **Performance:** This has huge performance implications: Leptos is simply _much_ faster at both creating and updating the UI than Yew is.
- **Mental model:** Adopting fine-grained reactivity also tends to simplify the mental model. There are no surprising component re-renders because there are no re-renders. Your app can be divided into components based on what makes sense for your app, because they have no performance implications.
### How is this different from Sycamore?
@@ -154,9 +146,9 @@ Conceptually, these two frameworks are very similar: because both are built on f
There are some practical differences that make a significant difference:
- **Maturity:** Sycamore is obviously a much more mature and stable library with a larger ecosystem.
- **Templating:** Leptos uses a JSX-like template format (built on [syn-rsx](https://github.com/stoically/syn-rsx)) for its `view` macro. Sycamore offers the choice of its own templating DSL or a builder syntax.
- **Server integration:** Leptos provides primitives that encourage HTML streaming and allow for easy async integration and RPC calls, even without WASM enabled, making it easy to opt into integrations between your frontend and backend code without pushing you toward any particular metaframework patterns.
- **Read-write segregation:** Leptos, like Solid, encourages read-write segregation between signal getters and setters, so you end up accessing signals with tuples like `let (count, set_count) = create_signal(cx, 0);` _(If you prefer or if it's more convenient for your API, you can use [`create_rw_signal`](https://docs.rs/leptos/latest/leptos/fn.create_rw_signal.html) to give a unified read/write signal.)_
- **Read-write segregation:** Leptos, like Solid, encourages read-write segregation between signal getters and setters, so you end up accessing signals with tuples like `let (count, set_count) = create_signal(cx, 0);` _(If you prefer or if it's more convenient for your API, you can use `create_rw_signal` to give a unified read/write signal.)_
- **Signals are functions:** In Leptos, you can call a signal to access it rather than calling a specific method (so, `count()` instead of `count.get()`) This creates a more consistent mental model: accessing a reactive value is always a matter of calling a function. For example:
```rust

View File

@@ -17,11 +17,15 @@ lazy_static = "1"
log = "0.4"
strum = "0.24"
strum_macros = "0.24"
serde = { version = "1", features = ["derive", "rc"] }
serde = { version = "1", features = ["derive", "rc"]}
serde_json = "1"
tera = "1"
reactive-signals = "0.1.0-alpha.4"
[dependencies.web-sys]
version = "0.3"
features = ["Window", "Document", "HtmlElement", "HtmlInputElement"]
features = [
"Window",
"Document",
"HtmlElement",
"HtmlInputElement"
]

View File

@@ -2,6 +2,6 @@
extern crate test;
//åmod reactive;
mod reactive;
//mod ssr;
mod todomvc;
//mod todomvc;

View File

@@ -10,8 +10,8 @@ fn leptos_deep_creation(b: &mut Bencher) {
create_scope(runtime, |cx| {
let signal = create_rw_signal(cx, 0);
let mut memos = Vec::<Memo<usize>>::new();
for _ in 0..1000usize {
let prev = memos.last().copied();
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move |_| prev.get() + 1));
} else {
@@ -34,8 +34,9 @@ fn leptos_deep_update(b: &mut Bencher) {
create_scope(runtime, |cx| {
let signal = create_rw_signal(cx, 0);
let mut memos = Vec::<Memo<usize>>::new();
for _ in 0..1000usize {
if let Some(prev) = memos.last().copied() {
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move |_| prev.get() + 1));
} else {
memos.push(create_memo(cx, move |_| signal.get() + 1));
@@ -161,77 +162,6 @@ fn leptos_scope_creation_and_disposal(b: &mut Bencher) {
runtime.dispose();
}
#[bench]
fn rs_deep_update(b: &mut Bencher) {
use reactive_signals::{Scope, Signal, signal, runtimes::ClientRuntime, types::Func};
let sc = ClientRuntime::new_root_scope();
b.iter(|| {
let signal = signal!(sc, 0);
let mut memos = Vec::<Signal<Func<i32>, ClientRuntime>>::new();
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(signal!(sc, move || prev.get() + 1))
} else {
memos.push(signal!(sc, move || signal.get() + 1))
}
}
signal.set(1);
assert_eq!(memos[999].get(), 1001);
});
}
#[bench]
fn rs_fanning_out(b: &mut Bencher) {
use reactive_signals::{Scope, Signal, signal, runtimes::ClientRuntime, types::Func};
let cx = ClientRuntime::new_root_scope();
b.iter(|| {
let sig = signal!(cx, 0);
let memos = (0..1000)
.map(|_| signal!(cx, move || sig.get()))
.collect::<Vec<_>>();
assert_eq!(memos.iter().map(|m| m.get()).sum::<i32>(), 0);
sig.set(1);
assert_eq!(memos.iter().map(|m| m.get()).sum::<i32>(), 1000);
});
}
#[bench]
fn rs_narrowing_update(b: &mut Bencher) {
use reactive_signals::{Scope, Signal, signal, runtimes::ClientRuntime, types::Func};
let cx = ClientRuntime::new_root_scope();
b.iter(|| {
let acc = Rc::new(Cell::new(0));
let sigs =
(0..1000).map(|n| signal!(cx, n)).collect::<Vec<_>>();
let memo = signal!(cx, {
let sigs = sigs.clone();
move || {
sigs.iter().map(|r| r.get()).sum::<i32>()
}
});
assert_eq!(memo.get(), 499500);
signal!(cx, {
let acc = Rc::clone(&acc);
move || {
acc.set(memo.get());
}
});
assert_eq!(acc.get(), 499500);
sigs[1].update(|n| *n += 1);
sigs[10].update(|n| *n += 1);
sigs[100].update(|n| *n += 1);
assert_eq!(acc.get(), 499503);
assert_eq!(memo.get(), 499503);
});
}
#[bench]
fn l021_deep_creation(b: &mut Bencher) {
use l021::*;
@@ -241,8 +171,9 @@ fn l021_deep_creation(b: &mut Bencher) {
create_scope(runtime, |cx| {
let signal = create_rw_signal(cx, 0);
let mut memos = Vec::<Memo<usize>>::new();
for _ in 0..1000usize {
if let Some(prev) = memos.last().copied() {
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move |_| prev.get() + 1));
} else {
memos.push(create_memo(cx, move |_| signal.get() + 1));
@@ -264,8 +195,9 @@ fn l021_deep_update(b: &mut Bencher) {
create_scope(runtime, |cx| {
let signal = create_rw_signal(cx, 0);
let mut memos = Vec::<Memo<usize>>::new();
for _ in 0..1000usize {
if let Some(prev) = memos.last().copied() {
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move |_| prev.get() + 1));
} else {
memos.push(create_memo(cx, move |_| signal.get() + 1));
@@ -441,8 +373,9 @@ fn sycamore_deep_creation(b: &mut Bencher) {
let d = create_scope(|cx| {
let signal = create_signal(cx, 0);
let mut memos = Vec::<&ReadSignal<usize>>::new();
for _ in 0..1000usize {
if let Some(prev) = memos.last().copied() {
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move || *prev.get() + 1));
} else {
memos.push(create_memo(cx, move || *signal.get() + 1));
@@ -461,8 +394,9 @@ fn sycamore_deep_update(b: &mut Bencher) {
let d = create_scope(|cx| {
let signal = create_signal(cx, 0);
let mut memos = Vec::<&ReadSignal<usize>>::new();
for _ in 0..1000usize {
if let Some(prev) = memos.last().copied() {
for i in 0..1000usize {
let prev = memos.get(i.saturating_sub(1)).copied();
if let Some(prev) = prev {
memos.push(create_memo(cx, move || *prev.get() + 1));
} else {
memos.push(create_memo(cx, move || *signal.get() + 1));

View File

@@ -4,7 +4,7 @@ use test::Bencher;
fn leptos_ssr_bench(b: &mut Bencher) {
b.iter(|| {
use leptos::*;
leptos_dom::HydrationCtx::reset_id();
HydrationCtx::reset_id();
_ = create_scope(create_runtime(), |cx| {
#[component]
fn Counter(cx: Scope, initial: i32) -> impl IntoView {
@@ -32,8 +32,7 @@ fn leptos_ssr_bench(b: &mut Bencher) {
assert_eq!(
rendered,
"<main id=\"_0-1\"><h1 id=\"_0-2\">Welcome to our benchmark page.</h1><p id=\"_0-3\">Here&#x27;s some introductory text.</p><div id=\"_0-3-1\"><button id=\"_0-3-2\">-1</button><span id=\"_0-3-3\">Value: <!>1<!--hk=_0-3-4-->!</span><button id=\"_0-3-5\">+1</button></div><!--hk=_0-3-0--><div id=\"_0-3-5-1\"><button id=\"_0-3-5-2\">-1</button><span id=\"_0-3-5-3\">Value: <!>2<!--hk=_0-3-5-4-->!</span><button id=\"_0-3-5-5\">+1</button></div><!--hk=_0-3-5-0--><div id=\"_0-3-5-5-1\"><button id=\"_0-3-5-5-2\">-1</button><span id=\"_0-3-5-5-3\">Value: <!>3<!--hk=_0-3-5-5-4-->!</span><button id=\"_0-3-5-5-5\">+1</button></div><!--hk=_0-3-5-5-0--></main>"
);
"<main id=\"_0-1\"><h1 id=\"_0-2\">Welcome to our benchmark page.</h1><p id=\"_0-3\">Here's some introductory text.</p><div id=\"_0-3-1\"><button id=\"_0-3-2\">-1</button><span id=\"_0-3-3\">Value: <!>1<!--hk=_0-3-4-->!</span><button id=\"_0-3-5\">+1</button></div><!--hk=_0-3-0--><div id=\"_0-3-5-1\"><button id=\"_0-3-5-2\">-1</button><span id=\"_0-3-5-3\">Value: <!>2<!--hk=_0-3-5-4-->!</span><button id=\"_0-3-5-5\">+1</button></div><!--hk=_0-3-5-0--><div id=\"_0-3-5-5-1\"><button id=\"_0-3-5-5-2\">-1</button><span id=\"_0-3-5-5-3\">Value: <!>3<!--hk=_0-3-5-5-4-->!</span><button id=\"_0-3-5-5-5\">+1</button></div><!--hk=_0-3-5-5-0--></main>" );
});
});
}

View File

@@ -1,7 +1,6 @@
pub use leptos::*;
use miniserde::*;
use web_sys::HtmlInputElement;
use wasm_bindgen::JsCast;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Todos(pub Vec<Todo>);
@@ -111,6 +110,10 @@ pub fn TodoMVC(cx: Scope, todos: Todos) -> impl IntoView {
provide_context(cx, set_todos);
let (mode, set_mode) = create_signal(cx, Mode::All);
window_event_listener("hashchange", move |_| {
let new_mode = location_hash().map(|hash| route(&hash)).unwrap_or_default();
set_mode(new_mode);
});
let add_todo = move |ev: web_sys::KeyboardEvent| {
let target = event_target::<HtmlInputElement>(&ev);
@@ -164,79 +167,57 @@ pub fn TodoMVC(cx: Scope, todos: Todos) -> impl IntoView {
});
view! { cx,
<main>
<section class="todoapp">
<header class="header">
<h1>"todos"</h1>
<input
class="new-todo"
placeholder="What needs to be done?"
autofocus=""
on:keydown=add_todo
/>
</header>
<section class="main" class:hidden=move || todos.with(|t| t.is_empty())>
<input
id="toggle-all"
class="toggle-all"
type="checkbox"
prop:checked=move || todos.with(|t| t.remaining() > 0)
on:input=move |_| set_todos.update(|t| t.toggle_all())
/>
<label for="toggle-all">"Mark all as complete"</label>
<ul class="todo-list">
<For
each=filtered_todos
key=|todo| todo.id
view=move |cx, todo: Todo| {
view! { cx, <Todo todo=todo.clone()/> }
}
/>
</ul>
</section>
<footer class="footer" class:hidden=move || todos.with(|t| t.is_empty())>
<span class="todo-count">
<strong>{move || todos.with(|t| t.remaining().to_string())}</strong>
{move || if todos.with(|t| t.remaining()) == 1 { " item" } else { " items" }}
" left"
</span>
<ul class="filters">
<li>
<a
href="#/"
class="selected"
class:selected=move || mode() == Mode::All
>
"All"
</a>
</li>
<li>
<a href="#/active" class:selected=move || mode() == Mode::Active>
"Active"
</a>
</li>
<li>
<a href="#/completed" class:selected=move || mode() == Mode::Completed>
"Completed"
</a>
</li>
</ul>
<button
class="clear-completed hidden"
class:hidden=move || todos.with(|t| t.completed() == 0)
on:click=move |_| set_todos.update(|t| t.clear_completed())
>
"Clear completed"
</button>
</footer>
</section>
<footer class="info">
<p>"Double-click to edit a todo"</p>
<p>"Created by " <a href="http://todomvc.com">"Greg Johnston"</a></p>
<p>"Part of " <a href="http://todomvc.com">"TodoMVC"</a></p>
</footer>
</main>
}.into_view(cx)
<main>
<section class="todoapp">
<header class="header">
<h1>"todos"</h1>
<input class="new-todo" placeholder="What needs to be done?" autofocus="" on:keydown=add_todo />
</header>
<section class="main" class:hidden={move || todos.with(|t| t.is_empty())}>
<input id="toggle-all" class="toggle-all" type="checkbox"
prop:checked={move || todos.with(|t| t.remaining() > 0)}
on:input=move |_| set_todos.update(|t| t.toggle_all())
/>
<label for="toggle-all">"Mark all as complete"</label>
<ul class="todo-list">
<For
each=filtered_todos
key=|todo| todo.id
view=move |todo: Todo| view! { cx, <Todo todo=todo.clone() /> }
/>
</ul>
</section>
<footer class="footer" class:hidden={move || todos.with(|t| t.is_empty())}>
<span class="todo-count">
<strong>{move || todos.with(|t| t.remaining().to_string())}</strong>
{move || if todos.with(|t| t.remaining()) == 1 {
" item"
} else {
" items"
}}
" left"
</span>
<ul class="filters">
<li><a href="#/" class="selected" class:selected={move || mode() == Mode::All}>"All"</a></li>
<li><a href="#/active" class:selected={move || mode() == Mode::Active}>"Active"</a></li>
<li><a href="#/completed" class:selected={move || mode() == Mode::Completed}>"Completed"</a></li>
</ul>
<button
class="clear-completed hidden"
class:hidden={move || todos.with(|t| t.completed() == 0)}
on:click=move |_| set_todos.update(|t| t.clear_completed())
>
"Clear completed"
</button>
</footer>
</section>
<footer class="info">
<p>"Double-click to edit a todo"</p>
<p>"Created by "<a href="http://todomvc.com">"Greg Johnston"</a></p>
<p>"Part of "<a href="http://todomvc.com">"TodoMVC"</a></p>
</footer>
</main>
}.into_view(cx)
}
#[component]
@@ -256,36 +237,41 @@ pub fn Todo(cx: Scope, todo: Todo) -> impl IntoView {
};
view! { cx,
<li class="todo" class:editing=editing class:completed=move || (todo.completed)()>
<li
class="todo"
class:editing={editing}
class:completed={move || (todo.completed)()}
//_ref=input
>
<div class="view">
<input class="toggle" type="checkbox" prop:checked=move || (todo.completed)()/>
<label on:dblclick=move |_| set_editing(true)>{move || todo.title.get()}</label>
<button
class="destroy"
on:click=move |_| set_todos.update(|t| t.remove(todo.id))
></button>
<input
class="toggle"
type="checkbox"
prop:checked={move || (todo.completed)()}
/>
<label on:dblclick=move |_| set_editing(true)>
{move || todo.title.get()}
</label>
<button class="destroy" on:click=move |_| set_todos.update(|t| t.remove(todo.id))/>
</div>
{move || {
editing()
.then(|| {
view! { cx,
<input
class="edit"
class:hidden=move || !(editing)()
prop:value=move || todo.title.get()
on:focusout=move |ev| save(&event_target_value(&ev))
on:keyup=move |ev| {
let key_code = ev.unchecked_ref::<web_sys::KeyboardEvent>().key_code();
if key_code == ENTER_KEY {
save(&event_target_value(&ev));
} else if key_code == ESCAPE_KEY {
set_editing(false);
}
}
/>
{move || editing().then(|| view! { cx,
<input
class="edit"
class:hidden={move || !(editing)()}
prop:value={move || todo.title.get()}
on:focusout=move |ev| save(&event_target_value(&ev))
on:keyup={move |ev| {
let key_code = ev.unchecked_ref::<web_sys::KeyboardEvent>().key_code();
if key_code == ENTER_KEY {
save(&event_target_value(&ev));
} else if key_code == ESCAPE_KEY {
set_editing(false);
}
})
}}
}}
/>
})
}
</li>
}
}

View File

@@ -7,15 +7,19 @@ mod yew;
#[bench]
fn leptos_todomvc_ssr(b: &mut Bencher) {
use ::leptos::*;
let runtime = create_runtime();
b.iter(|| {
use crate::todomvc::leptos::*;
let html = ::leptos::ssr::render_to_string(|cx| {
view! { cx, <TodoMVC todos=Todos::new(cx)/> }
_ = create_scope(create_runtime(), |cx| {
let rendered = view! {
cx,
<TodoMVC todos=Todos::new(cx)/>
}
.into_view(cx)
.render_to_string(cx);
assert!(rendered.len() > 1);
});
assert!(html.len() > 1);
});
}
@@ -53,20 +57,21 @@ fn yew_todomvc_ssr(b: &mut Bencher) {
});
});
}
/*
#[bench]
fn leptos_todomvc_ssr_with_1000(b: &mut Bencher) {
b.iter(|| {
use self::leptos::*;
use ::leptos::*;
let html = ::leptos::ssr::render_to_string(|cx| {
view! {
_ = create_scope(create_runtime(), |cx| {
let rendered = view! {
cx,
<TodoMVC todos=Todos::new_with_1000(cx)/>
}
}.into_view(cx).render_to_string(cx);
assert!(rendered.len() > 1);
});
assert!(html.len() > 1);
});
}
@@ -103,4 +108,5 @@ fn yew_todomvc_ssr_with_1000(b: &mut Bencher) {
assert!(rendered.len() > 1);
});
});
}
}
*/

View File

@@ -174,4 +174,4 @@ fn tera_todomvc_1000(b: &mut Bencher) {
let _ = TERA.render("template.html", &ctx).unwrap();
});
}
}

View File

@@ -28,52 +28,6 @@ let (a, set_a) = create_signal(cx, 0);
let b = move || a () > 5;
```
### Nested signal updates/reads triggering panic
Sometimes you have nested signals: for example, hash-map that can change over time, each of whose values can also change over time:
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let resources = create_rw_signal(cx, HashMap::new());
let update = move |id: usize| {
resources.update(|resources| {
resources
.entry(id)
.or_insert_with(|| create_rw_signal(cx, 0))
.update(|amount| *amount += 1)
})
};
view! { cx,
<div>
<pre>{move || format!("{:#?}", resources.get().into_iter().map(|(id, resource)| (id, resource.get())).collect::<Vec<_>>())}</pre>
<button on:click=move |_| update(1)>"+"</button>
</div>
}
}
```
Clicking the button twice will cause a panic, because of the nested signal *read*. Calling the `update` function on `resources` immediately takes out a mutable borrow on `resources`, then updates the `resource` signal—which re-runs the effect that reads from the signals, which tries to immutably access `resources` and panics. It's the nested update here which causes a problem, because the inner update triggers and effect that tries to read both signals while the outer is still updating.
You can fix this fairly easily by using the [`Scope::batch()`](https://docs.rs/leptos/latest/leptos/struct.Scope.html#method.batch) method:
```rust
let update = move |id: usize| {
cx.batch(move || {
resources.update(|resources| {
resources
.entry(id)
.or_insert_with(|| create_rw_signal(cx, 0))
.update(|amount| *amount += 1)
})
});
};
```
This delays running any effects until after both updates are made, preventing the conflict entirely without requiring any other restructuring.
## Templates and the DOM
### `<input value=...>` doesn't update or stops updating
@@ -107,19 +61,3 @@ view! {
<input prop:value=a on:input=on_input />
}
```
## Build configuration
### Cargo feature resolution in workspaces
A new [version](https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions) of Cargo's feature resolver was introduced for the 2021 edition of Rust.
For single crate projects it will select a resolver version based on the Rust edition in `Cargo.toml`. As there is no Rust edition present for `Cargo.toml` in a workspace, Cargo will default to the pre 2021 edition resolver.
This can cause issues resulting in non WASM compatible code being built for a WASM target. Seeing `mio` failing to build is often a sign that none WASM compatible code is being included in the build.
The resolver version can be set in the workspace `Cargo.toml` to remedy this issue.
```toml
[workspace]
members = ["member1", "member2"]
resolver = "2"
```

View File

@@ -107,6 +107,4 @@ create_effect(cx, move |prev_value| {
Every time `count` is updated, this effect wil rerun. This is what allows reactive, fine-grained updates to the DOM.
[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>
<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"></iframe>

View File

@@ -84,7 +84,7 @@ fn FancyMath(cx: Scope) -> impl IntoView {
This kind of “provide a signal in a parent, consume it in a child” should be familiar
from the chapter on [parent-child interactions](./view/08_parent_child.md). The same
pattern you use to communicate between parents and children works for grandparents and
grandchildren, or any ancestors and descendants: in other words, between “global” state
grandchildren, or any ancestors and descendents: in other words, between “global” state
in the root component of your app and any other components anywhere else in the app.
Because of the fine-grained nature of updates, this is usually all you need. However,
@@ -122,7 +122,6 @@ fn App(cx: Scope) -> impl IntoView {
provide_context(cx, state);
// ...
}
```
Then child components can access “slices” of that state with fine-grained
@@ -169,6 +168,4 @@ somewhere else that only takes `state.name`, clicking the button wont cause
that other slice to update. This allows you to combine the benefits of a top-down
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 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">

View File

@@ -19,7 +19,6 @@
- [Suspense](./async/11_suspense.md)
- [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)
@@ -27,25 +26,23 @@
- [Nested Routing](./router/17_nested_routing.md)
- [Params and Queries](./router/18_params_and_queries.md)
- [`<A/>`](./router/19_a.md)
- [`<Form/>`](./router/20_form.md)
- [Interlude: Styling](./interlude_styling.md)
- [`<Form/>`]()
- [Interlude: Styling — CSS, Tailwind, Style.rs, and more]()
- [Metadata]()
- [Server Side Rendering](./ssr/README.md)
- [`cargo-leptos`](./ssr/21_cargo_leptos.md)
- [The Life of a Page Load](./ssr/22_life_cycle.md)
- [Async Rendering and SSR “Modes”](./ssr/23_ssr_modes.md)
- [Hydration Footguns](./ssr/24_hydration_bugs.md)
- [Server Functions]()
- [SSR]()
- [Models of SSR]()
- [`cargo-leptos`]()
- [Hydration Footguns]()
- [Request/Response]()
- [Extractors]()
- [Axum]()
- [Actix]()
- [Headers]()
- [Cookies]()
- [Building Full-Stack Apps]()
- [Server Functions]()
- [Actions]()
- [Forms]()
- [`<ActionForm/>`s]()
- [Turning off WebAssembly]()
- [Advanced Reactivity]()
- [Appendix: Optimizing WASM Binary Size](./appendix_binary_size.md)
- [Appendix: Optimizing WASM Binary Size]()

View File

@@ -1,58 +0,0 @@
# Appendix: Optimizing WASM Binary Size
One of the primary downsides of deploying a Rust/WebAssembly frontend app is that splitting a WASM file into smaller chunks to be dynamically loaded is significantly more difficult than splitting a JavaScript bundle. There have been experiments like [`wasm-split`](https://emscripten.org/docs/optimizing/Module-Splitting.html) in the Emscripten ecosystem but at present theres no way to split and dynamically load a Rust/`wasm-bindgen` binary. This means that the whole WASM binary needs to be loaded before your app becomes interactive. Because the WASM format is designed for streaming compilation, WASM files are much faster to compile per kilobyte than JavaScript files. (For a deeper look, you can [read this great article from the Mozilla team](https://hacks.mozilla.org/2018/01/making-webassembly-even-faster-firefoxs-new-streaming-and-tiering-compiler/) on streaming WASM compilation.)
Still, its important to ship the smallest WASM binary to users that you can, as it will reduce their network usage and make your app interactive as quickly as possible.
So what are some practical steps?
## Things to Do
1. Make sure youre looking at a release build. (Debug builds are much, much larger.)
2. Add a release profile for WASM that optimizes for size, not speed.
For a `cargo-leptos` project, for example, you can add this to your `Cargo.toml`:
```toml
[profile.wasm-release]
inherits = "release"
opt-level = 'z'
lto = true
codegen-units = 1
# ....
[package.metadata.leptos]
# ....
lib-profile-release = "wasm-release"
```
This will hyper-optimize the WASM for your release build for size, while keeping your server build optimized for speed. (For a pure client-rendered app without server considerations, just use the `[profile.wasm-release]` block as your `[profile.release]`.)
3. Always serve compressed WASM in production. WASM tends to compress very well, typically shrinking to less than 50% its uncompressed size, and its trivial to enable compression for static files being served from Actix or Axum.
4. If youre using nightly Rust, you can rebuild the standard library with this same profile rather than the prebuilt standard library thats distributed with the `wasm32-unknown-unknown` target.
To do this, create a file in your project at `.cargo/config.toml`
```toml
[unstable]
build-std = ["std", "panic_abort", "core", "alloc"]
build-std-features = ["panic_immediate_abort"]
```
5. One of the sources of binary size in WASM binaries can be `serde` serialization/deserialization code. Leptos uses `serde` by default to serialize and deserialize resources created with `create_resource`. You might try experimenting with the `miniserde` and `serde-lite` features, which allow you to use those crates for serialization and deserialization instead; each only implements a subset of `serde`s functionality, but typically optimizes for size over speed.
## Things to Avoid
There are certain crates that tend to inflate binary sizes. For example, the `regex` crate with its default features adds about 500kb to a WASM binary (largely because it has to pull in Unicode table data!) In a size-conscious setting, you might consider avoiding regexes in general, or even dropping down and calling browser APIs to use the built-in regex engine instead. (This is what `leptos_router` does on the few occasions it needs a regular expression.)
In general, Rusts commitment to runtime performance is sometimes at odds with a commitment to a small binary. For example, Rust monomorphizes generic functions, meaning it creates a distinct copy of the function for each generic type its called with. This is significantly faster than dynamic dispatch, but increases binary size. Leptos tries to balance runtime performance with binary size considerations pretty carefully; but you might find that writing code that uses many generics tends to increase binary size. For example, if you have a generic component with a lot of code in its body and call it with four different types, remember that the compiler could include four copies of that same code. Refactoring to use a concrete inner function or helper can often maintain performance and ergonomics while reducing binary size.
## A Final Thought
Remember that in a server-rendered app, JS bundle size/WASM binary size affects only _one_ thing: time to interactivity on the first load. This is very important to a good user experience—nobody wants to click a button three times and have it do nothing because the interactive code is still loading—but it is not the only important measure.
Its especially worth remembering that streaming in a single WASM binary means all subsequent navigations are nearly instantaneous, depending only on any additional data loading. Precisely because your WASM binary is _not_ bundle split, navigating to a new route does not require loading additional JS/WASM, as it does in nearly every JavaScript framework. Is this copium? Maybe. Or maybe its just an honest trade-off between the two approaches!
Always take the opportunity to optimize the low-hanging fruit in your application. And always test your app under real circumstances with real user network speeds and devices before making any heroic efforts.

View File

@@ -50,6 +50,4 @@ view! { cx,
Resources also provide a `refetch()` method that allows you to manually reload the data (for example, in response to a button click) and a `loading()` method that returns a `ReadSignal<bool>` indicating whether the resource is currently loading or not.
[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>
<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"></iframe>

View File

@@ -26,11 +26,11 @@ let b = create_resource(cx, count2, |count| async move { load_b(count).await });
view! { cx,
<h1>"My Data"</h1>
{move || match (a.read(cx), b.read(cx)) {
_ => view! { cx, <p>"Loading..."</p> }.into_view(cx),
(Some(a), Some(b)) => view! { cx,
<ShowA a/>
<ShowA b/>
}.into_view(cx),
_ => view! { cx, <p>"Loading..."</p> }.into_view(cx)
}.into_view(cx)
}}
}
```
@@ -69,6 +69,4 @@ Every time one of the resources is reloading, the `"Loading..."` fallback will s
This inversion of the flow of control makes it easier to add or remove individual resources, as you dont need to handle the matching yourself. It also unlocks some massive performance improvements during server-side rendering, which well talk about during a later chapter.
[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>
<iframe src="https://codesandbox.io/p/sandbox/11-suspense-907niv?file=%2Fsrc%2Fmain.rs" width="100%" height="1000px"></iframe>

View File

@@ -4,8 +4,6 @@ Youll notice in the `<Suspense/>` example that if you keep reloading the data
`<Transition/>` behaves exactly the same as `<Suspense/>`, but instead of falling back every time, it only shows the fallback the first time. On all subsequent loads, it continues showing the old data until the new data are ready. This can be really handy to prevent the flickering effect, and to allow users to continue interacting with your application.
This example shows how you can create a simple tabbed contact list with `<Transition/>`. When you select a new tab, it continues showing the current contact until the new data loads. This can be a much better user experience than constantly falling back to a loading message.
This example shows how you can create a simple tabbed contact list with `<Transition/>`. When you select a new tab, it continues showing the current contact until the new data laods. This can be a much better user experience than constantly falling back to a loading message.
[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>
<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"></iframe>

View File

@@ -91,6 +91,4 @@ view! { cx,
Now, theres a chance this all seems a little over-complicated, or maybe too restricted. I wanted to include actions here, alongside resources, as the missing piece of the puzzle. In a real Leptos app, youll actually most often use actions alongside server functions, [`create_server_action`](https://docs.rs/leptos/latest/leptos/fn.create_server_action.html), and the [`<ActionForm/>`](https://docs.rs/leptos_router/latest/leptos_router/fn.ActionForm.html) component to create really powerful progressively-enhanced forms. So if this primitive seems useless to you... Dont worry! Maybe it will make sense later. (Or check out our [`todo_app_sqlite`](https://github.com/leptos-rs/leptos/blob/main/examples/todo_app_sqlite/src/todo.rs) example now.)
[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>
<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"></iframe>

View File

@@ -1,7 +1,7 @@
# Working with `async`
So far weve only been working with synchronous users interfaces: You provide some input,
the app immediately processes it and updates the interface. This is great, but is a tiny
the app immediately process it and updates the interface. This is great, but is a tiny
subset of what web applications do. In particular, most web apps have to deal with some kind
of asynchronous data loading, usually loading something from an API.

View File

@@ -1,177 +0,0 @@
# Projecting Children
As you build components you may occasionally find yourself wanting to “project” children through multiple layers of components.
## The Problem
Consider the following:
```rust
pub fn LoggedIn<F, IV>(cx: Scope, fallback: F, children: ChildrenFn) -> impl IntoView
where
F: Fn(Scope) -> IV + 'static,
IV: IntoView,
{
view! { cx,
<Suspense
fallback=|| ()
>
<Show
// check whether user is verified
// by reading from the resource
when=move || todo!()
fallback=fallback
>
{children(cx)}
</Show>
</Suspense>
}
}
```
This is pretty straightforward: when the user is logged in, we want to show `children`. Until if the user is not logged in, we want to show `fallback`. And while were waiting to find out, we just render `()`, i.e., nothing.
In other words, we want to pass the children of `<WhenLoaded/>` _through_ the `<Suspense/>` component to become the children of the `<Show/>`. This is what I mean by “projection.”
This wont compile.
```
error[E0507]: cannot move out of `fallback`, a captured variable in an `Fn` closure
error[E0507]: cannot move out of `children`, a captured variable in an `Fn` closure
```
The problem here is that both `<Suspense/>` and `<Show/>` need to be able to construct their `children` multiple times. The first time you construct `<Suspense/>`s children, it would take ownership of `fallback` and `children` to move them into the invocation of `<Show/>`, but then they're not available for future `<Suspense/>` children construction.
## The Details
> Feel free to skip ahead to the solution.
If you want to really understand the issue here, it may help to look at the expanded `view` macro. Heres a cleaned-up version:
```rust
Suspense(
cx,
::leptos::component_props_builder(&Suspense)
.fallback(|| ())
.children({
// fallback and children are moved into this closure
Box::new(move |cx| {
{
// fallback and children captured here
leptos::Fragment::lazy(|| {
vec![
(Show(
cx,
::leptos::component_props_builder(&Show)
.when(|| true)
// but fallback is moved into Show here
.fallback(fallback)
// and children is moved into Show here
.children(children)
.build(),
)
.into_view(cx)),
]
})
}
})
})
.build(),
)
```
All components own their props; so the `<Show/>` in this case cant be called because it only has captured references to `fallback` and `children`.
## Solution
However, both `<Suspense/>` and `<Show/>` take `ChildrenFn`, i.e., their `children` should implement the `Fn` type so they can be called multiple times with only an immutable reference. This means we dont need to own `children` or `fallback`; we just need to be able to pass `'static` references to them.
We can solve this problem by using the [`store_value`](https://docs.rs/leptos/latest/leptos/fn.store_value.html) primitive. This essentially stores a value in the reactive system, handing ownership off to the framework in exchange for a reference that is, like signals, `Copy` and `'static`, which we can access or modify through certain methods.
In this case, its really simple:
```rust
pub fn LoggedIn<F, IV>(cx: Scope, fallback: F, children: ChildrenFn) -> impl IntoView
where
F: Fn(Scope) -> IV + 'static,
IV: IntoView,
{
let fallback = store_value(cx, fallback);
let children = store_value(cx, children);
view! { cx,
<Suspense
fallback=|| ()
>
<Show
when=|| todo!()
fallback=move |cx| fallback.with_value(|fallback| fallback(cx))
>
{children.with_value(|children| children(cx))}
</Show>
</Suspense>
}
}
```
At the top level, we store both `fallback` and `children` in the reactive scope owned by `LoggedIn`. Now we can simply move those references down through the other layers into the `<Show/>` component and call them there.
## A Final Note
Note that this works because `<Show/>` and `<Suspense/>` only need an immutable reference to their children (which `.with_value` can give it), not ownership.
In other cases, you may need to project owned props through a function that takes `ChildrenFn` and therefore needs to be called more than once. In this case, you may find the `clone:` helper in the`view` macro helpful.
Consider this example
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let name = "Alice".to_string();
view! { cx,
<Outer>
<Inner>
<Inmost name=name.clone()/>
</Inner>
</Outer>
}
}
#[component]
pub fn Outer(cx: Scope, children: ChildrenFn) -> impl IntoView {
children(cx)
}
#[component]
pub fn Inner(cx: Scope, children: ChildrenFn) -> impl IntoView {
children(cx)
}
#[component]
pub fn Inmost(cx: Scope, name: String) -> impl IntoView {
view! { cx,
<p>{name}</p>
}
}
```
Even with `name=name.clone()`, this gives the error
```
cannot move out of `name`, a captured variable in an `Fn` closure
```
Its captured through multiple levels of children that need to run more than once, and theres no obvious way to clone it _into_ the children.
In this case, the `clone:` syntax comes in handy. Calling `clone:name` will clone `name` _before_ moving it into `<Inner/>`s children, which solves our ownership issue.
```rust
view! { cx,
<Outer>
<Inner clone:name>
<Inmost name=name.clone()/>
</Inner>
</Outer>
}
```
These issues can be a little tricky to understand or debug, because of the opacity of the `view` macro. But in general, they can always be solved.

View File

@@ -1,112 +0,0 @@
# Interlude: Styling
Anyone creating a website or application soon runs into the question of styling. For a small app, a single CSS file is probably plenty to style your user interface. But as an application grows, many developers find that plain CSS becomes increasingly hard to manage.
Some frontend frameworks (like Angular, Vue, and Svelte) provide built-in ways to scope your CSS to particular components, making it easier to manage styles across a whole application without styles meant to modify one small component having a global effect. Other frameworks (like React or Solid) dont provide built-in CSS scoping, but rely on libraries in the ecosystem to do it for them. Leptos is in this latter camp: the framework itself has no opinions about CSS at all, but provides a few tools and primitives that allow others to build styling libraries.
Here are a few different approaches to styling your Leptos app, other than plain CSS.
## TailwindCSS: Utility-first CSS
[TailwindCSS](https://tailwindcss.com/) is a popular utility-first CSS library. It allows you to style your application by using inline utility classes, with a custom CLI tool that scans your files for Tailwind class names and bundles the necessary CSS.
This allows you to write components like this:
```rust
#[component]
fn Home(cx: Scope) -> impl IntoView {
let (count, set_count) = create_signal(cx, 0);
view! { cx,
<main class="my-0 mx-auto max-w-3xl text-center">
<h2 class="p-6 text-4xl">"Welcome to Leptos with Tailwind"</h2>
<p class="px-10 pb-10 text-left">"Tailwind will scan your Rust files for Tailwind class names and compile them into a CSS file."</p>
<button
class="bg-sky-600 hover:bg-sky-700 px-5 py-3 text-white rounded-lg"
on:click=move |_| set_count.update(|count| *count += 1)
>
{move || if count() == 0 {
"Click me!".to_string()
} else {
count().to_string()
}}
</button>
</main>
}
}
```
It can be a little complicated to set up the Tailwind integration at first, but you can check out our two examples of how to use Tailwind with a [client-side-rendered `trunk` application](https://github.com/leptos-rs/leptos/tree/main/examples/tailwind_csr_trunk) or with a [server-rendered `cargo-leptos` application](https://github.com/leptos-rs/leptos/tree/main/examples/tailwind). `cargo-leptos` also has some [built-in Tailwind support](https://github.com/leptos-rs/cargo-leptos#site-parameters) that you can use as an alternative to Tailwinds CLI.
## Stylers: Compile-time CSS Extraction
[Stylers](https://github.com/abishekatp/stylers) is a compile-time scoped CSS library that lets you declare scoped CSS in the body of your component. Stylers will extract this CSS at compile time into CSS files that you can then import into your app, which means that it doesnt add anything to the WASM binary size of your application.
This allows you to write components like this:
```rust
use stylers::style;
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let styler_class = style! { "App",
#two{
color: blue;
}
div.one{
color: red;
content: raw_str(r#"\hello"#);
font: "1.3em/1.2" Arial, Helvetica, sans-serif;
}
div {
border: 1px solid black;
margin: 25px 50px 75px 100px;
background-color: lightblue;
}
h2 {
color: purple;
}
@media only screen and (max-width: 1000px) {
h3 {
background-color: lightblue;
color: blue
}
}
};
view! { cx, class = styler_class,
<div class="one">
<h1 id="two">"Hello"</h1>
<h2>"World"</h2>
<h2>"and"</h2>
<h3>"friends!"</h3>
</div>
}
}
```
## Styled: Runtime CSS Scoping
[Styled](https://github.com/eboody/styled) is a runtime scoped CSS library that integrates well with Leptos. It lets you declare scoped CSS in the body of your component function, and then applies those styles at runtime.
```rust
use styled::style;
#[component]
pub fn MyComponent(cx: Scope) -> impl IntoView {
let styles = style!(
div {
background-color: red;
color: white;
}
);
styled::view! { cx, styles,
<div>"This text should be red with white text."</div>
}
}
```
## Contributions Welcome
Leptos has no opinions on how you style your website or app, but were very happy to provide support to any tools youre trying to create to make it easier. If youre working on a CSS or styling approach that youd like to add to this list, please let us know!

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@@ -167,6 +167,4 @@ In fact, in this case, we dont even need to rerender the `<Contact/>` compone
> This sandbox includes a couple features (like nested routing) discussed in this section and the previous one, and a couple well cover in the rest of this chapter. The router is such an integrated system that it makes sense to provide a single example, so dont be surprised if theres anything you dont understand.
[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>
<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"></iframe>

View File

@@ -58,8 +58,8 @@ let id = move || {
The untyped versions return `Memo<ParamsMap>`. Again, its memo to react to changes in the URL. [`ParamsMap`](https://docs.rs/leptos_router/0.2.3/leptos_router/struct.ParamsMap.html) behaves a lot like any other map type, with a `.get()` method that returns `Option<&String>`.
```rust
let params = use_params_map(cx);
let query = use_query_map(cx);
let params = use_params::<ContactParams>(cx);
let query = use_query::<ContactSearch>(cx);
// id: || -> Option<String>
let id = move || {
@@ -74,6 +74,4 @@ This can get a little messy: deriving a signal that wraps an `Option<_>` or `Res
> 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>
<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"></iframe>

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@@ -18,6 +18,4 @@ The router also provides an [`<A>`](https://docs.rs/leptos_router/latest/leptos_
> Once again, this is the same example. Check out the relative `<A/>` components, and take a look at the CSS in `index.html` to see the ARIA-based styling.
[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>
<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"></iframe>

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@@ -1,67 +0,0 @@
# The `<Form/>` Component
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.
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.
The router provides a [`<Form>`](https://docs.rs/leptos_router/latest/leptos_router/fn.Form.html) component, which works like the HTML `<form>` element, but uses client-side navigations instead of full page reloads. `<Form/>` works with both `GET` and `POST` requests. With `method="GET"`, it will navigate to the URL encoded in the form data. With `method="POST"` it will make a `POST` request and handle the servers response.
`<Form/>` provides the basis for some components like `<ActionForm/>` and `<MultiActionForm/>` that well see in later chapters. But it also enables some powerful patterns of its own.
For example, imagine that you want to create a search field that updates search results in real time as the user searches, without a page reload, but that also stores the search in the URL so a user can copy and paste it to share results with someone else.
It turns out that the patterns weve learned so far make this easy to implement.
```rust
async fn fetch_results() {
// some async function to fetch our search results
}
#[component]
pub fn FormExample(cx: Scope) -> impl IntoView {
// reactive access to URL query strings
let query = use_query_map(cx);
// search stored as ?q=
let search = move || query().get("q").cloned().unwrap_or_default();
// a resource driven by the search string
let search_results = create_resource(cx, search, fetch_results);
view! { cx,
<Form method="GET" action="">
<input type="search" name="search" value=search/>
<input type="submit"/>
</Form>
<Transition fallback=move || ()>
/* render search results */
</Transition>
}
}
```
Whenever you click `Submit`, the `<Form/>` will “navigate” to `?q={search}`. But because this navigation is done on the client side, theres no page flicker or reload. The URL query string changes, which triggers `search` to update. Because `search` is the source signal for the `search_results` resource, this triggers `search_results` to reload its resource. The `<Transition/>` continues displaying the current search results until the new ones have loaded. When they are complete, it switches to displaying the new result.
This is a great pattern. The data flow is extremely clear: all data flows from the URL to the resource into the UI. The current state of the application is stored in the URL, which means you can refresh the page or text the link to a friend and it will show exactly what youre expecting. And once we introduce server rendering, this pattern will prove to be really fault-tolerant, too: because it uses a `<form>` element and URLs under the hood, it actually works really well without even loading your WASM on the client.
We can actually take it a step further and do something kind of clever:
```rust
view! { cx,
<Form method="GET" action="">
<input type="search" name="search" value=search
oninput="this.form.requestSubmit()"
/>
</Form>
}
```
Youll notice that this version drops the `Submit` button. Instead, we add an `oninput` attribute to the input. Note that this is _not_ `on:input`, which would listen for the `input` event and run some Rust code. Without the colon, `oninput` is the plain HTML attribute. So the string is actually a JavaScript string. `this.form` gives us the form the input is attached to. `requestSubmit()` fires the `submit` event on the `<form>`, which is caught by `<Form/>` just as if we had clicked a `Submit` button. Now the form will “navigate” on every keystroke or input to keep the URL (and therefore the search) perfectly in sync with the users input as they type.
[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>

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@@ -16,7 +16,7 @@ The Leptos Router works with the path and query (`/blog/search?q=Search`). Given
## The Philosophy
In most cases, the path should drive what is displayed on the page. From the users perspective, for most applications, most major changes in the state of the app should be reflected in the URL. If you copy and paste the URL and open it in another tab, you should find yourself more or less in the same place.
In most cases, the path should drive what is displayed on the page. From the users perspective, for most appliations, most major changes in the state of the app should be reflected in the URL. If you copy and paste the URL and open it in another tab, you should find yourself more or less in the same place.
In this sense, the router is really at the heart of the global state management for your application. More than anything else, it drives what is displayed on the page.

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@@ -1,37 +0,0 @@
# Introducing `cargo-leptos`
So far, weve just been running code in the browser and using Trunk to coordinate the build process and run a local development process. If were going to add server-side rendering, well need to run our application code on the server as well. This means well need to build two separate binaries, one compiled to native code and running the server, the other compiled to WebAssembly (WASM) and running in the users browser. Additionally, the server needs to know how to serve this WASM version (and the JavaScript required to initialize it) to the browser.
This is not an insurmountable task but it adds some complication. For convenience and an easier developer experience, we built the [`cargo-leptos`](https://github.com/leptos-rs/cargo-leptos) build tool. `cargo-leptos` basically exists to coordinate the build process for your app, handling recompiling the server and client halves when you make changes, and adding some built-in support for things like Tailwind, SASS, and testing.
Getting started is pretty easy. Just run
```bash
cargo install cargo-leptos
```
And then to create a new project, you can run either
```bash
# for an Actix template
cargo leptos new --git leptos-rs/start
```
or
```bash
# for an Axum template
cargo leptos new --git leptos-rs/start-axum
```
Now `cd` into the directory youve created and run
```bash
cargo leptos watch
```
Once your app has compiled you can open up your browser to [`http://localhost:3000`](http://localhost:3000) to see it.
`cargo-leptos` has lots of additional features and built in tools. You can learn more [in its `README`](https://github.com/leptos-rs/leptos/blob/main/examples/hackernews/src/api.rs).
But what exactly is happening when you open our browser to `localhost:3000`? Well, read on to find out.

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@@ -1,43 +0,0 @@
# The Life of a Page Load
Before we get into the weeds it might be helpful to have a higher-level overview. What exactly happens between the moment you type in the URL of a server-rendered Leptos app, and the moment you click a button and a counter increases?
Im assuming some basic knowledge of how the Internet works here, and wont get into the weeds about HTTP or whatever. Instead, Ill try to show how different parts of the Leptos APIs map onto each part of the process.
This description also starts from the premise that your app is being compiled for two separate targets:
1. A server version, often running on Actix or Axum, compiled with the Leptos `ssr` feature
2. A browser version, compiled to WebAssembly (WASM) with the Leptos `hydrate` feature
The [`cargo-leptos`](https://github.com/leptos-rs/cargo-leptos) build tool exists to coordinate the process of compiling your app for these two different targets.
## On the Server
- Your browser makes a `GET` request for that URL to your server. At this point, the browser knows almost nothing about the page thats going to be rendered. (The question “How does the browser know where to ask for the page?” is an interesting one, but out of the scope of this tutorial!)
- The server receives that request, and checks whether it has a way to handle a `GET` request at that path. This is what the `.leptos_routes()` methods in [`leptos_axum`](https://docs.rs/leptos_axum/0.2.5/leptos_axum/trait.LeptosRoutes.html) and [`leptos_actix`](https://docs.rs/leptos_actix/0.2.5/leptos_actix/trait.LeptosRoutes.html) are for. When the server starts up, these methods walk over the routing structure you provide in `<Routes/>`, generating a list of all possible routes your app can handle and telling the servers router “for each of these routes, if you get a request... hand it off to Leptos.”
- The server sees that this route can be handled by Leptos. So it renders your root component (often called something like `<App/>`), providing it with the URL thats being requested and some other data like the HTTP headers and request metadata.
- Your application runs once on the server, building up an HTML version of the component tree that will be rendered at that route. (Theres more to be said here about resources and `<Suspense/>` in the next chapter.)
- The server returns this HTML page, also injecting information on how to load the version of your app that has been compiled to WASM so that it can run in the browser.
> The HTML page thats returned is essentially your app, “dehydrated” or “freeze-dried”: it is HTML without any of the reactivity or event listeners youve added. The browser will “rehydrate” this HTML page by adding the reactive system and attaching event listeners to that server-rendered HTML. Hence the two feature flags that apply to the two halves of this process: `ssr` on the server for “server-side rendering”, and `hydrate` in the browser for that process of rehydration.
## In the Browser
- The browser receives this HTML page from the server. It immediately goes back to the server to begin loading the JS and WASM necessary to run the interactive, client side version of the app.
- In the meantime, it renders the HTML version.
- When the WASM version has reloaded, it does the same route-matching process that the server did. Because the `<Routes/>` component is identical on the server and in the client, the browser version will read the URL and render the same page that was already returned by the server.
- During this initial “hydration” phase, the WASM version of your app doesnt re-create the DOM nodes that make up your application. Instead, it walks over the existing HTML tree, “picking up” existing elements and adding the necessary interactivity.
> Note that there are some trade-offs here. Before this hydration process is complete, the page will _appear_ interactive but wont actually respond to interactions. For example, if you have a counter button and click it before WASM has loaded, the count will not increment, because the necessary event listeners and reactivity have not been added yet. Well look at some ways to build in “graceful degradation” in future chapters.
## Client-Side Navigation
The next step is very important. Imagine that the user now clicks a link to navigate to another page in your application.
The browser will _not_ make another round trip to the server, reloading the full page as it would for navigating between plain HTML pages or an application that uses server rendering (for example with PHP) but without a client-side half.
Instead, the WASM version of your app will load the new page, right there in the browser, without requesting another page from the server. Essentially, your app upgrades itself from a server-loaded “multi-page app” into a browser-rendered “single-page app.” This yields the best of both worlds: a fast initial load time due to the server-rendered HTML, and fast secondary navigations because of the client-side routing.
Some of what will be described in the following chapters—like the interactions between server functions, resources, and `<Suspense/>`—may seem overly complicated. You might find yourself asking, “If my page is being rendered to HTML on the server, why cant I just `.await` this on the server? If I can just call library X in a server function, why cant I call it in my component?” The reason is pretty simple: to enable the upgrade from server rendering to client rendering, everything in your application must be able to run either on the server or in the browser.
This is not the only way to create a website or web framework, of course. But its the most common way, and we happen to think its quite a good way, to create the smoothest possible experience for your users.

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@@ -1,122 +0,0 @@
# Async Rendering and SSR “Modes”
Server-rendering a page that uses only synchronous data is pretty simple: You just walk down the component tree, rendering each element to an HTML string. But this is a pretty big caveat: it doesnt answer the question of what we should do with pages that includes asynchronous data, i.e., the sort of stuff that would be rendered under a `<Suspense/>` node on the client.
When a page loads async data that it needs to render, what should we do? Should we wait for all the async data to load, and then render everything at once? (Lets call this “async” rendering) Should we go all the way in the opposite direction, just sending the HTML we have immediately down to the client and letting the client load the resources and fill them in? (Lets call this “synchronous” rendering) Or is there some middle-ground solution that somehow beats them both? (Hint: There is.)
If youve ever listened to streaming music or watched a video online, Im sure you realize that HTTP supports streaming, allowing a single connection to send chunks of data one after another without waiting for the full content to load. You may not realize that browsers are also really good at rendering partial HTML pages. Taken together, this means that you can actually enhance your users experience by **streaming HTML**: and this is something that Leptos supports out of the box, with no configuration at all. And theres actually more than one way to stream HTML: you can stream the chunks of HTML that make up your page in order, like frames of a video, or you can stream them... well, out of order.
Let me say a little more about what I mean.
Leptos supports all four different of these different ways to render HTML that includes asynchronous data.
## Synchronous Rendering
1. **Synchronous**: Serve an HTML shell that includes `fallback` for any `<Suspense/>`. Load data on the client using `create_local_resource`, replacing `fallback` once resources are loaded.
- _Pros_: App shell appears very quickly: great TTFB (time to first byte).
- _Cons_
- Resources load relatively slowly; you need to wait for JS + WASM to load before even making a request.
- No ability to include data from async resources in the `<title>` or other `<meta>` tags, hurting SEO and things like social media link previews.
If youre using server-side rendering, the synchronous mode is almost never what you actually want, from a performance perspective. This is because it misses out on an important optimization. If youre loading async resources during server rendering, you can actually begin loading the data on the server. Rather than waiting for the client to receive the HTML response, then loading its JS + WASM, _then_ realize it needs the resources and begin loading them, server rendering can actually begin loading the resources when the client first makes the response. In this sense, during server rendering an async resource is like a `Future` that begins loading on the server and resolves on the client. As long as the resources are actually serializable, this will always lead to a faster total load time.
> This is why [`create_resource`](https://docs.rs/leptos/latest/leptos/fn.create_resource.html) requires resources data to be serializable by default, and why you need to explicitly use [`create_local_resource`](https://docs.rs/leptos/latest/leptos/fn.create_local_resource.html) for any async data that is not serializable and should therefore only be loaded in the browser itself. Creating a local resource when you could create a serializable resource is always a deoptimization.
## Async Rendering
<video controls>
<source src="https://github.com/leptos-rs/leptos/blob/main/docs/video/async.mov?raw=true" type="video/mp4">
</video>
2. **`async`**: Load all resources on the server. Wait until all data are loaded, and render HTML in one sweep.
- _Pros_: Better handling for meta tags (because you know async data even before you render the `<head>`). Faster complete load than **synchronous** because async resources begin loading on server.
- _Cons_: Slower load time/TTFB: you need to wait for all async resources to load before displaying anything on the client. The page is totally blank until everything is loaded.
## In-Order Streaming
<video controls>
<source src="https://github.com/leptos-rs/leptos/blob/main/docs/video/in-order.mov?raw=true" type="video/mp4">
</video>
3. **In-order streaming**: Walk through the component tree, rendering HTML until you hit a `<Suspense/>`. Send down all the HTML youve got so far as a chunk in the stream, wait for all the resources accessed under the `<Suspense/>` to load, then render it to HTML and keep walking until you hit another `<Suspense/>` or the end of the page.
- _Pros_: Rather than a blank screen, shows at least _something_ before the data are ready.
- _Cons_
- Loads the shell more slowly than synchronous rendering (or out-of-order streaming) because it needs to pause at every `<Suspense/>`.
- Unable to show fallback states for `<Suspense/>`.
- Cant begin hydration until the entire page has loaded, so earlier pieces of the page will not be interactive until the suspended chunks have loaded.
## Out-of-Order Streaming
<video controls>
<source src="https://github.com/leptos-rs/leptos/blob/main/docs/video/out-of-order.mov?raw=true" type="video/mp4">
</video>
4. **Out-of-order streaming**: Like synchronous rendering, serve an HTML shell that includes `fallback` for any `<Suspense/>`. But load data on the **server**, streaming it down to the client as it resolves, and streaming down HTML for `<Suspense/>` nodes, which is swapped in to replace the fallback.
- _Pros_: Combines the best of **synchronous** and **`async`**.
- Fast initial response/TTFB because it immediately sends the whole synchronous shell
- Fast total time because resources begin loading on the server.
- Able to show the fallback loading state and dynamically replace it, instead of showing blank sections for un-loaded data.
- _Cons_: Requires JavaScript to be enabled for suspended fragments to appear in correct order. (This small chunk of JS streamed down in a `<script>` tag alongside the `<template>` tag that contains the rendered `<Suspense/>` fragment, so it does not need to load any additional JS files.)
## Using SSR Modes
Because it offers the best blend of performance characteristics, Leptos defaults to out-of-order streaming. But its really simple to opt into these different modes. You do it by adding an `ssr` property onto one or more of your `<Route/>` components, like in the [`ssr_modes` example](https://github.com/leptos-rs/leptos/blob/main/examples/ssr_modes/src/app.rs).
```rust
<Routes>
// Well load the home page with out-of-order streaming and <Suspense/>
<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=|cx| view! { cx, <Post/> }
ssr=SsrMode::Async
/>
</Routes>
```
For a path that includes multiple nested routes, the most restrictive mode will be used: i.e., if even a single nested route asks for `async` rendering, the whole initial request will be rendered `async`. `async` is the most restricted requirement, followed by in-order, and then out-of-order. (This probably makes sense if you think about it for a few minutes.)
## Blocking Resources
Any Leptos versions later than `0.2.5` (i.e., git main and `0.3.x` or later) introduce a new resource primitive with `create_blocking_resource`. A blocking resource still loads asynchronously like any other `async`/`.await` in Rust; it doesnt block a server thread or anything. Instead, reading from a blocking resource under a `<Suspense/>` blocks the HTML _stream_ from returning anything, including its initial synchronous shell, until that `<Suspense/>` has resolved.
Now from a performance perspective, this is not ideal. None of the synchronous shell for your page will load until that resource is ready. However, rendering nothing means that you can do things like set the `<title>` or `<meta>` tags in your `<head>` in actual HTML. This sounds a lot like `async` rendering, but theres one big difference: if you have multiple `<Suspense/>` sections, you can block on _one_ of them but still render a placeholder and then stream in the other.
For example, think about a blog post. For SEO and for social sharing, I definitely want my blog posts title and metadata in the initial HTML `<head>`. But I really dont care whether comments have loaded yet or not; Id like to load those as lazily as possible.
With blocking resources, I can do something like this:
```rust
#[component]
pub fn BlogPost(cx: Scope) -> impl IntoView {
let post_data = create_blocking_resource(cx, /* load blog post */);
let comment_data = create_resource(cx, /* load blog post */);
view! { cx,
<Suspense fallback=|| ()>
{move || {
post_data.with(cx, |data| {
view! { cx,
<Title text=data.title/>
<Meta name="description" content=data.excerpt/>
<article>
/* render the post content */
</article>
}
})
}}
</Suspense>
<Suspense fallback=|| "Loading comments...">
/* render comment data here */
</Suspense>
}
}
```
The first `<Suspense/>`, with the body of the blog post, will block my HTML stream, because it reads from a blocking resource. The second `<Suspense/>`, with the comments, will not block the stream. Blocking resources gave me exactly the power and granularity I needed to optimize my page for SEO and user experience.

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@@ -1,148 +0,0 @@
# Hydration Bugs _(and how to avoid them)_
## A Thought Experiment
Lets try an experiment to test your intuitions. Open up an app youre server-rendering with `cargo-leptos`. (If youve just been using `trunk` so far to play with examples, go [clone a `cargo-leptos` template](./21_cargo_leptos.md) just for the sake of this exercise.)
Put a log somewhere in your root component. (I usually call mine `<App/>`, but anything will do.)
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
leptos::log!("where do I run?");
// ... whatever
}
```
And lets fire it up
```bash
cargo leptos watch
```
Where do you expect `where do I run?` to log?
- In the command line where youre running the server?
- In the browser console when you load the page?
- Neither?
- Both?
Try it out.
...
...
...
Okay, consider the spoiler alerted.
Youll notice of course that it logs in both places, assuming everything goes according to plan. In fact on the server it logs twice—first during the initial server startup, when Leptos renders your app once to extract the route tree, then a second time when you make a request. Each time you reload the page, `where do I run?` should log once on the server and once on the client.
If you think about the description in the last couple sections, hopefully this makes sense. Your application runs once on the server, where it builds up a tree of HTML which is sent to the client. During this initial render, `where do I run?` logs on the server.
Once the WASM binary has loaded in the browser, your application runs a second time, walking over the same user interface tree and adding interactivity.
> Does that sound like a waste? It is, in a sense. But reducing that waste is a genuinely hard problem. Its what some JS frameworks like Qwik are intended to solve, although its probably too early to tell whether its a net performance gain as opposed to other approaches.
## The Potential for Bugs
Okay, hopefully all of that made sense. But what does it have to do with the title of this chapter, which is “Hydration bugs (and how to avoid them)”?
Remember that the application needs to run on both the server and the client. This generates a few different sets of potential issues you need to know how to avoid.
### Mismatches between server and client code
One way to create a bug is by creating a mismatch between the HTML thats sent down by the server and whats rendered on the client. Its actually fairly hard to do this unintentionally, I think (at least judging by the bug reports I get from people.) But imagine I do something like this
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
let data = if cfg!(target_arch = "wasm32") {
vec![0, 1, 2]
} else {
vec![]
};
data.into_iter()
.map(|value| view! { cx, <span>{value}</span> })
.collect_view(cx)
}
```
In other words, if this is being compiled to WASM, it has three items; otherwise its empty.
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 0-0-1 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.
#### Solution
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.
### 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.
Youll probably instantly see the dreaded message
```
panicked at 'cannot call wasm-bindgen imported functions on non-wasm targets'
```
Uh-oh.
But of course this makes sense. Weve just said that your app needs to run on the client and the server.
#### Solution
There are a few ways to avoid this:
1. Only use libraries that can run on both the server and the client. `reqwest`, for example, works for making HTTP requests in both settings.
2. Use different libraries on the server and the client, and gate them using the `#[cfg]` macro. ([Click here for an example](https://github.com/leptos-rs/leptos/blob/main/examples/hackernews/src/api.rs).)
3. Wrap client-only code in `create_effect`. Because `create_effect` only runs on the client, this can be an effective way to access browser APIs that are not needed for initial rendering.
For example, say that I want to store something in the browsers `localStorage` whenever a signal changes.
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
use gloo_storage::Storage;
let storage = gloo_storage::LocalStorage::raw();
leptos::log!("{storage:?}");
}
```
This panics because I cant access `LocalStorage` during server rendering.
But if I wrap it in an effect...
```rust
#[component]
pub fn App(cx: Scope) -> impl IntoView {
use gloo_storage::Storage;
create_effect(cx, move |_| {
let storage = gloo_storage::LocalStorage::raw();
leptos::log!("{storage:?}");
});
}
```
Its fine! This will render appropriately on the server, ignoring the client-only code, and then access the storage and log a message on the browser.
### Not all server code can run on the client
WebAssembly running in the browser is a pretty limited environment. You dont have access to a file-system or to many of the other things the standard library may be used to having. Not every crate can even be compiled to WASM, let alone run in a WASM environment.
In particular, youll sometimes see errors about the crate `mio` or missing things from `core`. This is generally a sign that you are trying to compile something to WASM that cant be compiled to WASM. If youre adding server-only dependencies, youll want to mark them `optional = true` in your `Cargo.toml` and then enable them in the `ssr` feature definition. (Check out one of the template `Cargo.toml` files to see more details.)
You can use `create_effect` to specify that something should only run on the client, and not in the server. Is there a way to specify that something should run only on the server, and not the client?
In fact, there is. The next chapter will cover the topic of server functions in some detail. (In the meantime, you can check out their docs [here](https://docs.rs/leptos_server/0.2.5/leptos_server/index.html).)

View File

@@ -1,21 +0,0 @@
# Server Side Rendering
So far, everything weve written has been rendered almost entirely in the browser. When we create an app using Trunk, its served using a local development server. If you build it for production and deploy it, its served by whatever server or CDN youre using. In either case, whats served is an HTML page with
1. the URL of your Leptos app, which has been compiled to WebAssembly (WASM)
2. the URL of the JavaScript used to initialized this WASM blob
3. an empty `<body>` element
When the JS and WASM have loaded, Leptos will render your app into the `<body>`. This means that nothing appears on the screen until JS/WASM have loaded and run. This has some drawbacks:
1. It increases load time, as your users screen is blank until additional resources have been downloaded.
2. Its bad for SEO, as load times are longer and the HTML you serve has no meaningful content.
3. Its broken for users for whom JS/WASM dont load for some reason (e.g., theyre on a train and just went into a tunnel before WASM finished loading; theyre using an older device that doesnt support WASM; they have JavaScript or WASM turned off for some reason; etc.)
These downsides apply across the web ecosystem, but especially to WASM apps.
So what do you do if you want to return more than just an empty `<body>` tag? Use “server-side rendering.”
Whole books could be (and probably have been) written about this topic, but at its core, its really simple: rather than returning an empty `<body>` tag, return an initial HTML page that reflects the actual starting state of your app or site, so that while JS/WASM are loading, and until they load, the user can access the plain HTML version.
The rest of this section will cover this topic in some detail!

View File

@@ -107,28 +107,27 @@ fn clear() {
test_wrapper.clone().unchecked_into(),
|cx| view! { cx, <SimpleCounter initial_value=10 step=1/> },
);
}
```
Well use some manual DOM operations to grab the `<div>` that wraps
the whole component, as well as the `clear` button.
```rust
// now we extract the buttons by iterating over the DOM
// this would be easier if they had IDs
let div = test_wrapper.query_selector("div").unwrap().unwrap();
let clear = test_wrapper
.query_selector("button")
.unwrap()
.unwrap()
.unchecked_into::<web_sys::HtmlElement>();
// now we extract the buttons by iterating over the DOM
// this would be easier if they had IDs
let div = test_wrapper.query_selector("div").unwrap().unwrap();
let clear = test_wrapper
.query_selector("button")
.unwrap()
.unwrap()
.unchecked_into::<web_sys::HtmlElement>();
```
Now we can use ordinary DOM APIs to simulate user interaction.
```rust
// now let's click the `clear` button
clear.click();
// now let's click the `clear` button
clear.click();
```
You can test individual DOM element attributes or text node values. Sometimes
@@ -136,27 +135,27 @@ I like to test the whole view at once. We can do this by testing the elements
`outerHTML` against our expectations.
```rust
assert_eq!(
div.outer_html(),
// here we spawn a mini reactive system to render the test case
run_scope(create_runtime(), |cx| {
// it's as if we're creating it with a value of 0, right?
let (value, set_value) = create_signal(cx, 0);
assert_eq!(
div.outer_html(),
// here we spawn a mini reactive system to render the test case
run_scope(create_runtime(), |cx| {
// it's as if we're creating it with a value of 0, right?
let (value, set_value) = create_signal(cx, 0);
// we can remove the event listeners because they're not rendered to HTML
view! { cx,
<div>
<button>"Clear"</button>
<button>"-1"</button>
<span>"Value: " {value} "!"</span>
<button>"+1"</button>
</div>
}
// the view returned an HtmlElement<Div>, which is a smart pointer for
// a DOM element. So we can still just call .outer_html()
.outer_html()
})
);
// we can remove the event listeners because they're not rendered to HTML
view! { cx,
<div>
<button>"Clear"</button>
<button>"-1"</button>
<span>"Value: " {value} "!"</span>
<button>"+1"</button>
</div>
}
// the view returned an HtmlElement<Div>, which is a smart pointer for
// a DOM element. So we can still just call .outer_html()
.outer_html()
})
);
```
That test involved us manually replicating the `view` thats inside the component.
@@ -165,14 +164,15 @@ with the initial value `0`. This is where our wrapping element comes in: Ill
the wrappers `innerHTML` against another comparison case.
```rust
assert_eq!(test_wrapper.inner_html(), {
let comparison_wrapper = document.create_element("section").unwrap();
leptos::mount_to(
comparison_wrapper.clone().unchecked_into(),
|cx| view! { cx, <SimpleCounter initial_value=0 step=1/>},
);
comparison_wrapper.inner_html()
});
assert_eq!(test_wrapper.inner_html(), {
let comparison_wrapper = document.create_element("section").unwrap();
leptos::mount_to(
comparison_wrapper.clone().unchecked_into(),
|cx| view! { cx, <SimpleCounter initial_value=0 step=1/>},
);
comparison_wrapper.inner_html()
});
}
```
This is only a very limited introduction to testing. But I hope its useful as you begin to build applications.

View File

@@ -1,14 +1,14 @@
# A Basic Component
That “Hello, world!” was a _very_ simple example. Lets move on to something a
That “Hello, world!” was a *very* simple example. Lets move on to something a
little more like an ordinary app.
First, lets edit the `main` function so that, instead of rendering the whole
app, it just renders an `<App/>` component. Components are the basic unit of
composition and design in most web frameworks, and Leptos is no exception.
Conceptually, they are similar to HTML elements: they represent a section of the
DOM, with self-contained, defined behavior. Unlike HTML elements, they are in
`PascalCase`, so most Leptos applications will start with something like an
composition and design in most web frameworks, and Leptos is no exception.
Conceptually, they are similar to HTML elements: they represent a section of the
DOM, with self-contained, defined behavior. Unlike HTML elements, they are in
`PascalCase`, so most Leptos applications will start with something like an
`<App/>` component.
```rust
@@ -39,12 +39,11 @@ fn App(cx: Scope) -> impl IntoView {
```
## The Component Signature
```rust
#[component]
```
Like all component definitions, this begins with the [`#[component]`](https://docs.rs/leptos/latest/leptos/attr.component.html) macro. `#[component]` annotates a function so it can be
Like all component definitions, this begins with the [`#[component]`](https://docs.rs/leptos/latest/leptos/attr.component.html) macro. `#[component]` annotates a function so it can be
used as a component in your Leptos application. Well see some of the other features of
this macro in a couple chapters.
@@ -53,7 +52,6 @@ fn App(cx: Scope) -> impl IntoView
```
Every component is a function with the following characteristics
1. It takes a reactive [`Scope`](https://docs.rs/leptos/latest/leptos/struct.Scope.html)
as its first argument. This `Scope` is our entrypoint into the reactive system.
By convention, its usually named `cx`.
@@ -62,8 +60,7 @@ Every component is a function with the following characteristics
anything you could return from a Leptos `view`.
## The Component Body
The body of the component function is a set-up function that runs once, not a
The body of the component function is a set-up function that runs once, not a
render function that reruns multiple times. Youll typically use it to create a
few reactive variables, define any side effects that run in response to those values
changing, and describe the user interface.
@@ -71,17 +68,16 @@ changing, and describe the user interface.
```rust
let (count, set_count) = create_signal(cx, 0);
```
[`create_signal`](https://docs.rs/leptos/latest/leptos/fn.create_signal.html)
creates a signal, the basic unit of reactive change and state management in Leptos.
This returns a `(getter, setter)` tuple. To access the current value, youll
use `count.get()` (or, on `nightly` Rust, the shorthand `count()`). To set the
This returns a `(getter, setter)` tuple. To access the current value, youll
use `count.get()` (or, on `nightly` Rust, the shorthand `count()`). To set the
current value, youll call `set_count.set(...)` (or `set_count(...)`).
> `.get()` clones the value and `.set()` overwrites it. In many cases, its more
> efficient to use `.with()` or `.update()`; check out the docs for [`ReadSignal`](https://docs.rs/leptos/latest/leptos/struct.ReadSignal.html) and [`WriteSignal`](https://docs.rs/leptos/latest/leptos/struct.WriteSignal.html) if youd like to learn more about those trade-offs at this point.
> `.get()` clones the value and `.set()` overwrites it. In many cases, its more
efficient to use `.with()` or `.update()`; check out the docs for [`ReadSignal`](https://docs.rs/leptos/latest/leptos/struct.ReadSignal.html) and [`WriteSignal`](https://docs.rs/leptos/latest/leptos/struct.WriteSignal.html) if youd like to learn more about those trade-offs at this point.
## The View
## The View
Leptos defines user interfaces using a JSX-like format via the [`view`](https://docs.rs/leptos/latest/leptos/macro.view.html) macro.
@@ -104,28 +100,25 @@ view! { cx,
This should mostly be easy to understand: it looks like HTML, with a special
`on:click` to define a `click` event listener, a text node thats formatted like
a Rust string, and then...
```rust
{move || count.get()}
```
whatever that is.
People sometimes joke that they use more closures in their first Leptos application
than theyve ever used in their lives. And fair enough. Basically, passing a function
People sometimes joke that they use more closures in their first Leptos application
than theyve ever used in their lives. And fair enough. Basically, passing a function
into the view tells the framework: “Hey, this is something that might change.”
When we click the button and call `set_count`, the `count` signal is updated. This
`move || count.get()` closure, whose value depends on the value of `count`, reruns,
and the framework makes a targeted update to that one specific text node, touching
When we click the button and call `set_count`, the `count` signal is updated. This
`move || count.get()` closure, whose value depends on the value of `count`, reruns,
and the framework makes a targeted update to that one specific text node, touching
nothing else in your application. This is what allows for extremely efficient updates
to the DOM.
Now, if you have Clippy on—or if you have a particularly sharp eye—you might notice
that this closure is redundant, at least if youre in `nightly` Rust. If youre using
that this closure is redundant, at least if youre in `nightly` Rust. If youre using
Leptos with `nightly` Rust, signals are already functions, so the closure is unnecessary.
As a result, you can write a simpler view:
As a result, you can write a simpler view:
```rust
view! { cx,
<button /* ... */>
@@ -136,17 +129,15 @@ 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
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()}` access 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!
> Throughout this tutorial, well use CodeSandbox to show interactive examples. To
> show the browser in the sandbox, you may need to click `Add DevTools >
Other Previews > 8080.` Hover over any of the variables to show Rust-Analyzer details
> and docs for whats going on. Feel free to fork the examples to play with them yourself!
> Throughout this tutorial, well use CodeSandbox to show interactive examples. To
show the browser in the sandbox, you may need to click `Add DevTools >
Other Previews > 8080.` Hover over any of the variables to show Rust-Analyzer details
and docs for whats going on. Feel free to fork the examples to play with them yourself!
[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>
<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"></iframe>

View File

@@ -1,13 +1,13 @@
# `view`: Dynamic Attributes and Classes
So far weve seen how to use the `view` macro to create event listeners and to
So far weve seen how to use the `view` macro to create event listeners and to
create dynamic text by passing a function (such as a signal) into the view.
But of course there are other things you might want to update in your user interface.
In this section, well look at how to update attributes and classes dynamically,
In this section, well look at how to update attributes and classes dynamically,
and well introduce the concept of a **derived signal**.
Lets start with a simple component that should be familiar: click a button to
Lets start with a simple component that should be familiar: click a button to
increment a counter.
```rust
@@ -20,12 +20,6 @@ fn App(cx: Scope) -> impl IntoView {
on:click=move |_| {
set_count.update(|n| *n += 1);
}
>
"Click me: "
{move || count()}
</button>
}
}
```
So far, this is just the example from the last chapter.
@@ -34,37 +28,27 @@ So far, this is just the example from the last chapter.
Now lets say Id like to update the list of CSS classes on this element dynamically.
For example, lets say I want to add the class `red` when the count is odd. I can
do this using the `class:` syntax.
do this using the `class:` syntax.
```rust
class:red=move || count() % 2 == 1
```
`class:` attributes take
1. the class name, following the colon (`red`)
2. a value, which can be a `bool` or a function that returns a `bool`
When the value is `true`, the class is added. When the value is `false`, the class
is removed. And if the value is a function that accesses a signal, the class will
is removed. And if the value is a function that accesses a signal, the class will
reactively update when the signal changes.
Now every time I click the button, the text should toggle between red and black as
Now every time I click the button, the text should toggle between red and black as
the number switches between even and odd.
> If youre following along, make sure you go into your `index.html` and add something like this:
>
> ```html
> <style>.red { color: red; }</style>
> ```
## Dynamic Attributes
The same applies to plain attributes. Passing a plain string or primitive value to
an attribute gives it a static value. Passing a function (including a signal) to
an attribute causes it to update its value reactively. Lets add another element
an attribute causes it to update its value reactively. Lets add another element
to our view:
```rust
<progress
max="50"
@@ -73,18 +57,17 @@ to our view:
/>
```
Now every time we set the count, not only will the `class` of the `<button>` be
toggled, but the `value` of the `<progress>` bar will increase, which means that
Now every time we set the count, not only will the `class` of the `<button>` be
toggled, but the `value` of the `<progress>` bar will increase, which means that
our progress bar will move forward.
## Derived Signals
## Derived Signals
Lets go one layer deeper, just for fun.
You already know that we create reactive interfaces just by passing functions into
You already know that we create reactive interfaces just by passing functions into
the `view`. This means that we can easily change our progress bar. For example,
suppose we want it to move twice as fast:
```rust
<progress
max="50"
@@ -94,31 +77,28 @@ suppose we want it to move twice as fast:
But imagine we want to reuse that calculation in more than one place. You can do this
using a **derived signal**: a closure that accesses a signal.
```rust
let double_count = move || count() * 2;
/* insert the rest of the view */
/* insert the rest of the view */
<progress
max="50"
// we use it once here
value=double_count
/>
<p>
"Double Count: "
"Double Count: "
// and again here
{double_count}
</p>
```
Derived signals let you create reactive computed values that can be used in multiple
Derived signals let you create reactive computed values that can be used in multiple
places in your application with minimal overhead.
> Note: Using a derived signal like this means that the calculation runs once per
> signal change per place we access `double_count`; in other words, twice. This is a
> very cheap calculation, so thats fine. Well look at memos in a later chapter, which
> are designed to solve this problem for expensive calculations.
> Note: Using a derived signal like this means that the calculation runs once per
signal change per place we access `double_count`; in other words, twice. This is a
very cheap calculation, so thats fine. Well look at memos in a later chapter, which
are designed to solve this problem for expensive calculations.
[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>
<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"></iframe>

View File

@@ -1,11 +1,11 @@
# Components and Props
So far, weve been building our whole application in a single component. This
is fine for really tiny examples, but in any real application youll need to
break the user interface out into multiple components, so you can break your
So far, weve been building our whole application in a single component. This
is fine for really tiny examples, but in any real application youll need to
break the user interface out into multiple components, so you can break your
interface down into smaller, reusable, composable chunks.
Lets take our progress bar example. Imagine that you want two progress bars
Lets take our progress bar example. Imagine that you want two progress bars
instead of one: one that advances one tick per click, one that advances two ticks
per click.
@@ -15,7 +15,7 @@ You _could_ do this by just creating two `<progress>` elements:
let (count, set_count) = create_signal(cx, 0);
let double_count = move || count() * 2;
view! {
view! {
<progress
max="50"
value=count
@@ -24,11 +24,10 @@ view! {
max="50"
value=double_count
/>
}
```
But of course, this doesnt scale very well. If you want to add a third progress
bar, you need to add this code another time. And if you want to edit anything
bar, you need to add this code another time. And if you want to edit anything
about it, you need to edit it in triplicate.
Instead, lets create a `<ProgressBar/>` component.
@@ -48,15 +47,15 @@ fn ProgressBar(
}
```
Theres just one problem: `progress` is not defined. Where should it come from?
When we were defining everything manually, we just used the local variable names.
Theres just one problem: `progress` is not defined. Where should it come from?
When we were defining everything manually, we just used the local variable names.
Now we need some way to pass an argument into the component.
## Component Props
## Component Props
We do this using component properties, or “props.” If youve used another frontend
framework, this is probably a familiar idea. Basically, properties are to components
as attributes are to HTML elements: they let you pass additional information into
framework, this is probably a familiar idea. Basically, properties are to components
as attributes are to HTML elements: they let you pass additional information into
the component.
In Leptos, you define props by giving additional arguments to the component function.
@@ -70,7 +69,7 @@ fn ProgressBar(
view! { cx,
<progress
max="50"
// now this works
// now this works
value=progress
/>
}
@@ -93,45 +92,41 @@ fn App(cx: Scope) -> impl IntoView {
}
```
Using a component in the view looks a lot like using an HTML element. Youll
notice that you can easily tell the difference between an element and a component
because components always have `PascalCase` names. You pass the `progress` prop
Using a component in the view looks a lot like using an HTML element. Youll
notice that you can easily tell the difference between an element and a component
because components always have `PascalCase` names. You pass the `progress` prop
in as if it were an HTML element attribute. Simple.
> ### Important Note
>
> For every `Component`, Leptos generates a corresponding `ComponentProps` type. This
> is what allows us to have named props, when Rust does not have named function parameters.
> If youre defining a component in one module and importing it into another, make
> sure you include this `ComponentProps` type:
> ### Important Note
> For every `Component`, Leptos generates a corresponding `ComponentProps` type. This
is what allows us to have named props, when Rust does not have named function parameters.
If youre defining a component in one module and importing it into another, make
sure you include this `ComponentProps` type:
>
> `use progress_bar::{ProgressBar, ProgressBarProps};`
>
> **Note**: This is still true as of `0.2.5`, but the requirement has been removed on `main`
> and will not apply to later versions.
### Reactive and Static Props
Youll notice that throughout this example, `progress` takes a reactive
Youll notice that throughout this example, `progress` takes a reactive
`ReadSignal<i32>`, and not a plain `i32`. This is **very important**.
Component props have no special meaning attached to them. A component is simply
a function that runs once to set up the user interface. The only way to tell the
interface to respond to changing is to pass it a signal type. So if you have a
component property that will change over time, like our `progress`, it should
Component props have no special meaning attached to them. A component is simply
a function that runs once to set up the user interface. The only way to tell the
interface to respond to changing is to pass it a signal type. So if you have a
component property that will change over time, like our `progress`, it should
be a signal.
### `optional` Props
### `optional` Props
Right now the `max` setting is hard-coded. Lets take that as a prop too. But
lets add a catch: lets make this prop optional by annotating the particular
Right now the `max` setting is hard-coded. Lets take that as a prop too. But
lets add a catch: lets make this prop optional by annotating the particular
argument to the component function with `#[prop(optional)]`.
```rust
#[component]
fn ProgressBar(
cx: Scope,
// mark this prop optional
// mark this prop optional
// you can specify it or not when you use <ProgressBar/>
#[prop(optional)]
max: u16,
@@ -147,7 +142,7 @@ fn ProgressBar(
```
Now, we can use `<ProgressBar max=50 value=count/>`, or we can omit `max`
to use the default value (i.e., `<ProgressBar value=count/>`). The default value
to use the default value (i.e., `<ProgressBar value=count/>`). The default value
on an `optional` is its `Default::default()` value, which for a `u16` is going to
be `0`. In the case of a progress bar, a max value of `0` is not very useful.
@@ -192,20 +187,20 @@ fn App(cx: Scope) -> impl IntoView {
"Click me"
</button>
<ProgressBar progress=count/>
// add a second progress bar
// add a second progress bar
<ProgressBar progress=double_count/>
}
}
```
Hm... this wont compile. It should be pretty easy to understand why: weve declared
that the `progress` prop takes `ReadSignal<i32>`, and `double_count` is not
`ReadSignal<i32>`. As rust-analyzer will tell you, its type is `|| -> i32`, i.e.,
that the `progress` prop takes `ReadSignal<i32>`, and `double_count` is not
`ReadSignal<i32>`. As rust-analyzer will tell you, its type is `|| -> i32`, i.e.,
its a closure that returns an `i32`.
There are a couple ways to handle this. One would be to say: “Well, I know that
a `ReadSignal` is a function, and I know that a closure is a function; maybe I
could just take any function?” If youre savvy, you may know that both these
There are a couple ways to handle this. One would be to say: “Well, I know that
a `ReadSignal` is a function, and I know that a closure is a function; maybe I
could just take any function?” If youre savvy, you may know that both these
implement the trait `Fn() -> i32`. So you could use a generic component:
```rust
@@ -215,8 +210,8 @@ fn ProgressBar<F>(
#[prop(default = 100)]
max: u16,
progress: F
) -> impl IntoView
where
) -> impl IntoView
where
F: Fn() -> i32 + 'static,
{
view! { cx,
@@ -228,26 +223,27 @@ where
}
```
This is a perfectly reasonable way to write this component: `progress` now takes
This is a perfectly reasonable way to write this component: `progress` now takes
any value that implements this `Fn()` trait.
> 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.
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
### `into` Props
Theres one more way we could implement this, and it would be to use `#[prop(into)]`.
Theres one more way we could implement this, and it would be to use `#[prop(into)]`.
This attribute automatically calls `.into()` on the values you pass as props,
which allows you to easily pass props with different values.
In this case, its helpful to know about the
In this case, its helpful to know about the
[`Signal`](https://docs.rs/leptos/latest/leptos/struct.Signal.html) type. `Signal`
is an enumerated type that represents any kind of readable reactive signal. It can
be useful when defining APIs for components youll want to reuse while passing
different sorts of signals. The [`MaybeSignal`](https://docs.rs/leptos/latest/leptos/enum.MaybeSignal.html) type is useful when you want to be able to take either a static or
is an enumerated type that represents any kind of readable reactive signal. It can
be useful when defining APIs for components youll want to reuse while passing
different sorts of signals. The [`MaybeSignal`](https://docs.rs/leptos/latest/leptos/enum.MaybeSignal.html) type is useful when you want to be able to take either a static or
reactive value.
```rust
#[component]
fn ProgressBar(
@@ -256,7 +252,7 @@ fn ProgressBar(
max: u16,
#[prop(into)]
progress: Signal<i32>
) -> impl IntoView
) -> impl IntoView
{
view! { cx,
<progress
@@ -285,12 +281,12 @@ fn App(cx: Scope) -> impl IntoView {
## Documenting Components
This is one of the least essential but most important sections of this book.
Its not strictly necessary to document your components and their props. It may
be very important, depending on the size of your team and your app. But its very
This is one of the least essential but most important sections of this book.
Its not strictly necessary to document your components and their props. It may
be very important, depending on the size of your team and your app. But its very
easy, and bears immediate fruit.
To document a component and its props, you can simply add doc comments on the
To document a component and its props, you can simply add doc comments on the
component function, and each one of the props:
```rust
@@ -313,11 +309,9 @@ Thats all you need to do. These behave like ordinary Rust doc comments, excep
that you can document individual component props, which cant be done with Rust
function arguments.
This will automatically generate documentation for your component, its `Props`
type, and each of the fields used to add props. It can be a little hard to
understand how powerful this is until you hover over the component name or props
This will automatically generate documentation for your component, its `Props`
type, and each of the fields used to add props. It can be a little hard to
understand how powerful this is until you hover over the component name or props
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>
<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"></iframe>

View File

@@ -1,19 +1,18 @@
# Iteration
Whether youre listing todos, displaying a table, or showing product images,
Whether youre listing todos, displaying a table, or showing product images,
iterating over a list of items is a common task in web applications. Reconciling
the differences between changing sets of items can also be one of the trickiest
tasks for a framework to handle well.
Leptos supports to two different patterns for iterating over items:
1. For static views: `Vec<_>`
2. For dynamic lists: `<For/>`
## Static Views with `Vec<_>`
Sometimes you need to show an item repeatedly, but the list youre drawing from
does not often change. In this case, its important to know that you can insert
Sometimes you need to show an item repeatedly, but the list youre drawing from
does not often change. In this case, its important to know that you can insert
any `Vec<IV> where IV: IntoView` into your view. In other words, if you can render
`T`, you can render `Vec<T>`.
@@ -31,22 +30,6 @@ view! { cx,
}
```
Leptos also provides a `.collect_view(cx)` helper function that allows you to collect any iterator of `T: IntoView` into `Vec<View>`.
```rust
let values = vec![0, 1, 2];
view! { cx,
// this will just render "012"
<p>{values.clone()}</p>
// or we can wrap them in <li>
<ul>
{values.into_iter()
.map(|n| view! { cx, <li>{n}</li>})
.collect_view(cx)}
</ul>
}
```
The fact that the _list_ is static doesnt mean the interface needs to be static.
You can render dynamic items as part of a static list.
@@ -68,41 +51,38 @@ let counter_buttons = counters
</li>
}
})
.collect_view(cx);
.collect::<Vec<_>>();
view! { cx,
<ul>{counter_buttons}</ul>
}
```
You _can_ render a `Fn() -> Vec<_>` reactively as well. But note that every time
You _can_ render a `Fn() -> Vec<_>` reactively as well. But note that every time
it changes, this will rerender every item in the list. This is quite inefficient!
Fortunately, theres a better way.
## Dynamic Rendering with the `<For/>` Component
The [`<For/>`](https://docs.rs/leptos/latest/leptos/fn.For.html) component is a
The [`<For/>`](https://docs.rs/leptos/latest/leptos/fn.For.html) component is a
keyed dynamic list. It takes three props:
- `each`: a function (such as a signal) that returns the items `T` to be iterated over
- `key`: a key function that takes `&T` and returns a stable, unique key or ID
- `view`: renders each `T` into a view
- `view`: renders each `T` into a view
`key` is, well, the key. You can add, remove, and move items within the list. As
long as each items key is stable over time, the framework does not need to rerender
any of the items, unless they are new additions, and it can very efficiently add,
remove, and move items as they change. This allows for extremely efficient updates
remove, and move items as they change. This allows for extremely efficient updates
to the list as it changes, with minimal additional work.
Creating a good `key` can be a little tricky. You generally do _not_ want to use
an index for this purpose, as it is not stable—if you remove or move items, their
Creating a good `key` can be a little tricky. You generally do _not_ want to use
an index for this purpose, as it is not stable—if you remove or move items, their
indices change.
But its a great idea to do something like generating a unique ID for each row as
But its a great idea to do something like generating a unique ID for each row as
it is generated, and using that as an ID for the key function.
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>
<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"></iframe>

View File

@@ -1,24 +1,23 @@
# Forms and Inputs
Forms and form inputs are an important part of interactive apps. There are two
Forms and form inputs are an important part of interactive apps. There are two
basic patterns for interacting with inputs in Leptos, which you may recognize
if youre familiar with React, SolidJS, or a similar framework: using **controlled**
or **uncontrolled** inputs.
## Controlled Inputs
In a "controlled input," the framework controls the state of the input
element. On every `input` event, it updates a local signal that holds the current
In a "controlled input," the framework controls the state of the input
element. On every `input` event, it updates a local signal that holds the current
state, which in turn updates the `value` prop of the input.
There are two important things to remember:
1. The `input` event fires on (almost) every change to the element, while the
`change` event fires (more or less) when you unfocus the input. You probably
1. The `input` event fires on (almost) every change to the element, while the
`change` event fires (more or less) when you unfocus the input. You probably
want `on:input`, but we give you the freedom to choose.
2. The `value` _attribute_ only sets the initial value of the input, i.e., it
only updates the input up to the point that you begin typing. The `value`
_property_ continues updating the input after that. You usually want to set
2. The `value` *attribute* only sets the initial value of the input, i.e., it
only updates the input up to the point that you begin typing. The `value`
*property* continues updating the input after that. You usually want to set
`prop:value` for this reason.
```rust
@@ -42,14 +41,14 @@ view! { cx,
}
```
## Uncontrolled Inputs
## Uncontrolled Inputs
In an "uncontrolled input," the browser controls the state of the input element.
Rather than continuously updating a signal to hold its value, we use a
[`NodeRef`](https://docs.rs/leptos/latest/leptos/struct.NodeRef.html) to access
In an "uncontrolled input," the browser controls the state of the input element.
Rather than continuously updating a signal to hold its value, we use a
[`NodeRef`](https://docs.rs/leptos/latest/leptos/struct.NodeRef.html) to access
the input once when we want to get its value.
In this example, we only notify the framework when the `<form>` fires a `submit`
In this example, we only notify the framework when the `<form>` fires a `submit`
event.
```rust
@@ -57,8 +56,7 @@ let (name, set_name) = create_signal(cx, "Uncontrolled".to_string());
let input_element: NodeRef<Input> = create_node_ref(cx);
```
`NodeRef` is a kind of reactive smart pointer: we can use it to access the
`NodeRef` is a kind of reactive smart pointer: we can use it to access the
underlying DOM node. Its value will be set when the element is rendered.
```rust
@@ -78,14 +76,13 @@ let on_submit = move |ev: SubmitEvent| {
set_name(value);
};
```
Our `on_submit` handler will access the inputs value and use it to call `set_name`.
To access the DOM node stored in the `NodeRef`, we can simply call it as a function
(or using `.get()`). This will return `Option<web_sys::HtmlInputElement>`, but we
know it will already have been filled when we rendered the view, so its safe to
(or using `.get()`). This will return `Option<web_sys::HtmlInputElement>`, but we
know it will already have been filled when we rendered the view, so its safe to
unwrap here.
We can then call `.value()` to get the value out of the input, because `NodeRef`
We can then call `.value()` to get the value out of the input, because `NodeRef`
gives us access to a correctly-typed HTML element.
```rust
@@ -100,15 +97,11 @@ view! { cx,
<p>"Name is: " {name}</p>
}
```
The view should be pretty self-explanatory by now. Note two things:
1. Unlike in the controlled input example, we use `value` (not `prop:value`).
This is because were just setting the initial value of the input, and letting
This is because were just setting the initial value of the input, and letting
the browser control its state. (We could use `prop:value` instead.)
2. We use `node_ref` to fill the `NodeRef`. (Older examples sometimes use `_ref`.
They are the same thing, but `node_ref` has better rust-analyzer support.)
[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>
<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"></iframe>

View File

@@ -282,6 +282,4 @@ 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>
<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"></iframe>

View File

@@ -80,7 +80,7 @@ fn NumericInput(cx: Scope) -> impl IntoView {
{move || errors.get()
.into_iter()
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
.collect_view(cx)
.collect::<Vec<_>>()
}
</ul>
</div>
@@ -110,6 +110,4 @@ Not a number! Errors:
If you fix the error, the error message will disappear and the content youre wrapping in
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>
<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"></iframe>

View File

@@ -15,7 +15,7 @@ covered some of this in the material on [components and props](./03_components.m
Basically if you want the parent to communicate to the child, you can pass a
[`ReadSignal`](https://docs.rs/leptos/latest/leptos/struct.ReadSignal.html), a
[`Signal`](https://docs.rs/leptos/latest/leptos/struct.Signal.html), or even a
[`MaybeSignal`](https://docs.rs/leptos/latest/leptos/enum.MaybeSignal.html) as a prop.
[`MaybeSignal`](https://docs.rs/leptos/latest/leptos/struct.MaybeSignal.html) as a prop.
But what about the other direction? How can a child send notifications about events
or state changes back up to the parent?
@@ -285,6 +285,4 @@ in `<ButtonD/>` and a single text node in `<App/>`. Its as if the components
themselves dont exist at all. And, well... at runtime, they dont. Its just
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>
<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"></iframe>

View File

@@ -103,7 +103,7 @@ pub fn WrapsChildren(cx: Scope, children: Children) -> impl IntoView {
.nodes
.into_iter()
.map(|child| view! { cx, <li>{child}</li> })
.collect_view(cx);
.collect::<Vec<_>>();
view! { cx,
<ul>{children}</ul>
@@ -123,6 +123,4 @@ view! { cx,
}
```
[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>
<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"></iframe>

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@@ -1,56 +0,0 @@
extend = [{ path = "./cargo-make/common.toml" }]
[env]
CARGO_MAKE_EXTEND_WORKSPACE_MAKEFILE = true
CARGO_MAKE_CARGO_BUILD_TEST_FLAGS = ""
CARGO_MAKE_WORKSPACE_EMULATION = true
CARGO_MAKE_CRATE_WORKSPACE_MEMBERS = [
"counter",
"counter_isomorphic",
"counters",
"counters_stable",
"counter_without_macros",
"error_boundary",
"errors_axum",
"fetch",
"hackernews",
"hackernews_axum",
"login_with_token_csr_only",
"parent_child",
"router",
"session_auth_axum",
"ssr_modes",
"ssr_modes_axum",
"tailwind",
"tailwind_csr_trunk",
"todo_app_sqlite",
"todo_app_sqlite_axum",
"todo_app_sqlite_viz",
"todomvc",
]
[tasks.verify-flow]
description = "Provides pre and post hooks for verify"
dependencies = ["pre-verify-flow", "verify", "post-verify-flow"]
[tasks.verify]
description = "Run all quality checks and tests"
dependencies = ["check-style", "test-unit-and-web"]
[tasks.test-unit-and-web]
description = "Run all unit and web tests"
dependencies = ["test-flow", "web-test-flow"]
[tasks.pre-verify-flow]
[tasks.post-verify-flow]
[tasks.web-test-flow]
description = "Provides pre and post hooks for web-test"
dependencies = ["pre-web-test-flow", "web-test", "post-web-test-flow"]
[tasks.pre-web-test-flow]
[tasks.web-test]
[tasks.post-web-test-flow]

View File

@@ -1,14 +0,0 @@
[env]
CARGO_MAKE_CLIPPY_ARGS = "--all-targets -- -D warnings"
[tasks.check-style]
description = "Check for style violations"
dependencies = ["check-format-flow", "clippy-flow"]
[tasks.verify-local]
description = "Run all quality checks and tests from an example directory"
dependencies = ["check-style", "test-local"]
[tasks.test-local]
description = "Run all tests from an example directory"
dependencies = ["test", "web-test"]

View File

@@ -1,4 +0,0 @@
[tasks.web-test]
env = { CARGO_MAKE_WASM_TEST_ARGS = "--headless --chrome" }
command = "cargo"
args = ["make", "wasm-pack-test"]

View File

@@ -3,17 +3,14 @@ name = "counter"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos" }
console_log = "1"
console_log = "0.2"
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"
web-sys ="0.3"

View File

@@ -1,8 +1,3 @@
extend = [
{ path = "../cargo-make/common.toml" },
{ path = "../cargo-make/wasm-web-test.toml" },
]
[tasks.build]
command = "cargo"
args = ["+nightly", "build-all-features"]

View File

@@ -1,7 +1,7 @@
use leptos::*;
/// A simple counter component.
///
///
/// You can use doc comments like this to document your component.
#[component]
pub fn SimpleCounter(
@@ -9,7 +9,7 @@ pub fn SimpleCounter(
/// The starting value for the counter
initial_value: i32,
/// The change that should be applied each time the button is clicked.
step: i32,
step: i32
) -> impl IntoView {
let (value, set_value) = create_signal(cx, initial_value);

View File

@@ -1,15 +1,13 @@
use counter::SimpleCounter;
use counter::*;
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,
<SimpleCounter
initial_value=0
step=1
/>
}
mount_to_body(|cx| view! { cx,
<SimpleCounter
initial_value=0
step=1
/>
})
}

View File

@@ -9,7 +9,7 @@ wasm_bindgen_test_configure!(run_in_browser);
fn clear() {
let document = leptos::document();
let test_wrapper = document.create_element("section").unwrap();
let _ = document.body().unwrap().append_child(&test_wrapper);
document.body().unwrap().append_child(&test_wrapper);
// start by rendering our counter and mounting it to the DOM
// note that we start at the initial value of 10
@@ -38,7 +38,7 @@ fn clear() {
// test case
run_scope(create_runtime(), |cx| {
// it's as if we're creating it with a value of 0, right?
let (value, _set_value) = create_signal(cx, 0);
let (value, set_value) = create_signal(cx, 0);
// we can remove the event listeners because they're not rendered to HTML
view! { cx,
@@ -71,7 +71,7 @@ fn clear() {
fn inc() {
let document = leptos::document();
let test_wrapper = document.create_element("section").unwrap();
let _ = document.body().unwrap().append_child(&test_wrapper);
document.body().unwrap().append_child(&test_wrapper);
mount_to(
test_wrapper.clone().unchecked_into(),
@@ -79,7 +79,7 @@ fn inc() {
);
// You can do testing with vanilla DOM operations
let _document = leptos::document();
let document = leptos::document();
let div = test_wrapper.query_selector("div").unwrap().unwrap();
let clear = div
.first_child()

View File

@@ -6,15 +6,11 @@ edition = "2021"
[lib]
crate-type = ["cdylib", "rlib"]
[profile.release]
codegen-units = 1
lto = true
[dependencies]
actix-files = { version = "0.6", optional = true }
actix-web = { version = "4", optional = true, features = ["macros"] }
broadcaster = "1"
console_log = "1"
console_log = "0.2"
console_error_panic_hook = "0.1"
futures = "0.3"
cfg-if = "1"

View File

@@ -1,5 +1,3 @@
extend = [{ path = "../cargo-make/common.toml" }]
[tasks.build]
command = "cargo"
args = ["+nightly", "build-all-features"]

View File

@@ -1,27 +1,27 @@
use cfg_if::cfg_if;
use leptos::*;
use leptos_meta::*;
use leptos_router::*;
use leptos_meta::*;
cfg_if! {
if #[cfg(feature = "ssr")] {
use std::sync::atomic::{AtomicI32, Ordering};
use broadcaster::BroadcastChannel;
static COUNT: AtomicI32 = AtomicI32::new(0);
#[cfg(feature = "ssr")]
use std::sync::atomic::{AtomicI32, Ordering};
lazy_static::lazy_static! {
pub static ref COUNT_CHANNEL: BroadcastChannel<i32> = BroadcastChannel::new();
}
#[cfg(feature = "ssr")]
use broadcaster::BroadcastChannel;
pub fn register_server_functions() {
_ = GetServerCount::register();
_ = AdjustServerCount::register();
_ = ClearServerCount::register();
}
}
#[cfg(feature = "ssr")]
pub fn register_server_functions() {
_ = GetServerCount::register();
_ = AdjustServerCount::register();
_ = ClearServerCount::register();
}
#[cfg(feature = "ssr")]
static COUNT: AtomicI32 = AtomicI32::new(0);
#[cfg(feature = "ssr")]
lazy_static::lazy_static! {
pub static ref COUNT_CHANNEL: BroadcastChannel<i32> = BroadcastChannel::new();
}
// "/api" is an optional prefix that allows you to locate server functions wherever you'd like on the server
#[server(GetServerCount, "/api")]
pub async fn get_server_count() -> Result<i32, ServerFnError> {
@@ -29,10 +29,7 @@ pub async fn get_server_count() -> Result<i32, ServerFnError> {
}
#[server(AdjustServerCount, "/api")]
pub async fn adjust_server_count(
delta: i32,
msg: String,
) -> Result<i32, ServerFnError> {
pub async fn adjust_server_count(delta: i32, msg: String) -> Result<i32, ServerFnError> {
let new = COUNT.load(Ordering::Relaxed) + delta;
COUNT.store(new, Ordering::Relaxed);
_ = COUNT_CHANNEL.send(&new).await;
@@ -49,49 +46,36 @@ pub async fn clear_server_count() -> Result<i32, ServerFnError> {
#[component]
pub fn Counters(cx: Scope) -> impl IntoView {
provide_meta_context(cx);
view! { cx,
view! {
cx,
<Router>
<header>
<h1>"Server-Side Counters"</h1>
<p>"Each of these counters stores its data in the same variable on the server."</p>
<p>
"The value is shared across connections. Try opening this is another browser tab to see what I mean."
</p>
<p>"The value is shared across connections. Try opening this is another browser tab to see what I mean."</p>
</header>
<nav>
<ul>
<li>
<A href="">"Simple"</A>
</li>
<li>
<A href="form">"Form-Based"</A>
</li>
<li>
<A href="multi">"Multi-User"</A>
</li>
<li><A href="">"Simple"</A></li>
<li><A href="form">"Form-Based"</A></li>
<li><A href="multi">"Multi-User"</A></li>
</ul>
</nav>
<Link rel="shortcut icon" type_="image/ico" href="/favicon.ico"/>
<main>
<Routes>
<Route
path=""
view=|cx| {
view! { cx, <Counter/> }
}
/>
<Route
path="form"
view=|cx| {
view! { cx, <FormCounter/> }
}
/>
<Route
path="multi"
view=|cx| {
view! { cx, <MultiuserCounter/> }
}
/>
<Route path="" view=|cx| view! {
cx,
<Counter/>
}/>
<Route path="form" view=|cx| view! {
cx,
<FormCounter/>
}/>
<Route path="multi" view=|cx| view! {
cx,
<MultiuserCounter/>
}/>
</Routes>
</main>
</Router>
@@ -109,47 +93,33 @@ pub fn Counter(cx: Scope) -> impl IntoView {
let clear = create_action(cx, |_| clear_server_count());
let counter = create_resource(
cx,
move || {
(
dec.version().get(),
inc.version().get(),
clear.version().get(),
)
},
move || (dec.version().get(), inc.version().get(), clear.version().get()),
|_| get_server_count(),
);
let value = move || {
let value = move || counter.read(cx).map(|count| count.unwrap_or(0)).unwrap_or(0);
let error_msg = move || {
counter
.read(cx)
.map(|count| count.unwrap_or(0))
.unwrap_or(0)
};
let error_msg = move || {
counter.read(cx).and_then(|res| match res {
Ok(_) => None,
Err(e) => Some(e),
})
.map(|res| match res {
Ok(_) => None,
Err(e) => Some(e),
})
.flatten()
};
view! { cx,
view! {
cx,
<div>
<h2>"Simple Counter"</h2>
<p>
"This counter sets the value on the server and automatically reloads the new value."
</p>
<p>"This counter sets the value on the server and automatically reloads the new value."</p>
<div>
<button on:click=move |_| clear.dispatch(())>"Clear"</button>
<button on:click=move |_| dec.dispatch(())>"-1"</button>
<span>"Value: " {value} "!"</span>
<button on:click=move |_| inc.dispatch(())>"+1"</button>
</div>
{move || {
error_msg()
.map(|msg| {
view! { cx, <p>"Error: " {msg.to_string()}</p> }
})
}}
{move || error_msg().map(|msg| view! { cx, <p>"Error: " {msg.to_string()}</p>})}
</div>
}
}
@@ -172,15 +142,19 @@ pub fn FormCounter(cx: Scope) -> impl IntoView {
);
let value = move || {
log::debug!("FormCounter looking for value");
counter.read(cx).and_then(|n| n.ok()).unwrap_or(0)
counter
.read(cx)
.map(|n| n.ok())
.flatten()
.map(|n| n)
.unwrap_or(0)
};
view! { cx,
view! {
cx,
<div>
<h2>"Form Counter"</h2>
<p>
"This counter uses forms to set the value on the server. When progressively enhanced, it should behave identically to the “Simple Counter.”"
</p>
<p>"This counter uses forms to set the value on the server. When progressively enhanced, it should behave identically to the “Simple Counter.”"</p>
<div>
// calling a server function is the same as POSTing to its API URL
// so we can just do that with a form and button
@@ -211,32 +185,26 @@ pub fn FormCounter(cx: Scope) -> impl IntoView {
// This is the primitive pattern for live chat, collaborative editing, etc.
#[component]
pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
let dec =
create_action(cx, |_| adjust_server_count(-1, "dec dec goose".into()));
let inc =
create_action(cx, |_| adjust_server_count(1, "inc inc moose".into()));
let dec = create_action(cx, |_| adjust_server_count(-1, "dec dec goose".into()));
let inc = create_action(cx, |_| adjust_server_count(1, "inc inc moose".into()));
let clear = create_action(cx, |_| clear_server_count());
#[cfg(not(feature = "ssr"))]
let multiplayer_value = {
use futures::StreamExt;
let mut source =
gloo_net::eventsource::futures::EventSource::new("/api/events")
.expect("couldn't connect to SSE stream");
let mut source = gloo_net::eventsource::futures::EventSource::new("/api/events")
.expect("couldn't connect to SSE stream");
let s = create_signal_from_stream(
cx,
source
.subscribe("message")
.unwrap()
.map(|value| match value {
Ok(value) => value
.1
.data()
.as_string()
.expect("expected string value"),
Err(_) => "0".to_string(),
}),
source.subscribe("message").unwrap().map(|value| {
value
.expect("no message event")
.1
.data()
.as_string()
.expect("expected string value")
}),
);
on_cleanup(cx, move || source.close());
@@ -244,20 +212,18 @@ pub fn MultiuserCounter(cx: Scope) -> impl IntoView {
};
#[cfg(feature = "ssr")]
let (multiplayer_value, _) = create_signal(cx, None::<i32>);
let (multiplayer_value, _) =
create_signal(cx, None::<i32>);
view! { cx,
view! {
cx,
<div>
<h2>"Multi-User Counter"</h2>
<p>
"This one uses server-sent events (SSE) to live-update when other users make changes."
</p>
<p>"This one uses server-sent events (SSE) to live-update when other users make changes."</p>
<div>
<button on:click=move |_| clear.dispatch(())>"Clear"</button>
<button on:click=move |_| dec.dispatch(())>"-1"</button>
<span>
"Multiplayer Value: " {move || multiplayer_value.get().unwrap_or_default()}
</span>
<span>"Multiplayer Value: " {move || multiplayer_value.get().unwrap_or_default().to_string()}</span>
<button on:click=move |_| inc.dispatch(())>"+1"</button>
</div>
</div>

View File

@@ -1,10 +1,10 @@
use cfg_if::cfg_if;
use leptos::*;
pub mod counters;
// Needs to be in lib.rs AFAIK because wasm-bindgen needs us to be compiling a lib. I may be wrong.
cfg_if! {
if #[cfg(feature = "hydrate")] {
use leptos::*;
use wasm_bindgen::prelude::wasm_bindgen;
use crate::counters::*;

View File

@@ -1,11 +1,11 @@
use cfg_if::cfg_if;
use leptos::*;
mod counters;
// boilerplate to run in different modes
cfg_if! {
// server-only stuff
if #[cfg(feature = "ssr")] {
use leptos::*;
use actix_files::{Files};
use actix_web::*;
use crate::counters::*;

View File

@@ -3,22 +3,11 @@ name = "counter_without_macros"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos", features = ["stable"] }
console_log = "1"
console_log = "0.2"
log = "0.4"
console_error_panic_hook = "0.1.7"
[dev-dependencies]
wasm-bindgen = "0.2.84"
wasm-bindgen-test = "0.3.34"
pretty_assertions = "1.3.0"
rstest = "0.17.0"
[dev-dependencies.web-sys]
features = ["HtmlElement", "XPathResult"]
version = "0.3.61"
wasm-bindgen-test = "0.3.0"

View File

@@ -1,8 +1,3 @@
extend = [
{ path = "../cargo-make/common.toml" },
{ path = "../cargo-make/wasm-web-test.toml" },
]
[tasks.build]
command = "cargo"
args = ["+stable", "build-all-features"]

View File

@@ -3,5 +3,3 @@
This example is the same like the `counter` but it's written without using macros and can be build with stable Rust.
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.
Issue the `cargo make test-flow` command to run unit and wasm tests.

View File

@@ -1,75 +1,48 @@
use leptos::{ev, html::*, *};
pub struct Props {
/// The starting value for the counter
pub initial_value: i32,
/// The change that should be applied each time the button is clicked.
pub step: i32,
}
/// A simple counter view.
// A component is really just a function call: it runs once to create the DOM and reactive system
pub fn counter(cx: Scope, initial_value: i32, step: u32) -> impl IntoView {
let (count, set_count) = create_signal(cx, Count::new(initial_value, step));
pub fn view(cx: Scope, props: Props) -> impl IntoView {
let Props {
initial_value,
step,
} = props;
let (value, set_value) = create_signal(cx, initial_value);
// elements are created by calling a function with a Scope argument
// the function name is the same as the HTML tag name
div(cx)
// children can be added with .child()
// this takes any type that implements IntoView as its argument
// for example, a string or an HtmlElement<_>
.child(
.child((
cx,
button(cx)
// typed events found in leptos::ev
// 1) prevent typos in event names
// 2) allow for correct type inference in callbacks
.on(ev::click, move |_| set_count.update(|count| count.clear()))
.child("Clear"),
)
.child(
.on(ev::click, move |_| set_value.update(|value| *value = 0))
.child((cx, "Clear")),
))
.child((
cx,
button(cx)
.on(ev::click, move |_| {
set_count.update(|count| count.decrease())
set_value.update(|value| *value -= step)
})
.child("-1"),
)
.child(
.child((cx, "-1")),
))
.child((
cx,
span(cx)
.child("Value: ")
// reactive values are passed to .child() as a tuple
// (Scope, [child function]) so an effect can be created
.child(move || count.get().value())
.child("!"),
)
.child(
.child((cx, "Value: "))
.child((cx, move || value.get()))
.child((cx, "!")),
))
.child((
cx,
button(cx)
.on(ev::click, move |_| {
set_count.update(|count| count.increase())
set_value.update(|value| *value += step)
})
.child("+1"),
)
}
#[derive(Debug, Clone)]
pub struct Count {
value: i32,
step: i32,
}
impl Count {
pub fn new(value: i32, step: u32) -> Self {
Count {
value,
step: step as i32,
}
}
pub fn value(&self) -> i32 {
self.value
}
pub fn increase(&mut self) {
self.value += self.step;
}
pub fn decrease(&mut self) {
self.value += -self.step;
}
pub fn clear(&mut self) {
self.value = 0;
}
.child((cx, "+1")),
))
}

View File

@@ -1,8 +1,16 @@
use counter_without_macros::counter;
use counter_without_macros as counter;
use leptos::*;
pub fn main() {
_ = console_log::init_with_level(log::Level::Debug);
console_error_panic_hook::set_once();
mount_to_body(|cx| counter(cx, 0, 1))
mount_to_body(|cx| {
counter::view(
cx,
counter::Props {
initial_value: 0,
step: 1,
},
)
})
}

View File

@@ -1,49 +0,0 @@
mod count {
use counter_without_macros::Count;
use pretty_assertions::assert_eq;
use rstest::rstest;
#[rstest]
#[case(-2, 1)]
#[case(-1, 1)]
#[case(0, 1)]
#[case(1, 1)]
#[case(2, 1)]
#[case(3, 2)]
#[case(4, 3)]
fn should_increase_count(#[case] initial_value: i32, #[case] step: u32) {
let mut count = Count::new(initial_value, step);
count.increase();
assert_eq!(count.value(), initial_value + step as i32);
}
#[rstest]
#[case(-2, 1)]
#[case(-1, 1)]
#[case(0, 1)]
#[case(1, 1)]
#[case(2, 1)]
#[case(3, 2)]
#[case(4, 3)]
#[trace]
fn should_decrease_count(#[case] initial_value: i32, #[case] step: u32) {
let mut count = Count::new(initial_value, step);
count.decrease();
assert_eq!(count.value(), initial_value - step as i32);
}
#[rstest]
#[case(-2, 1)]
#[case(-1, 1)]
#[case(0, 1)]
#[case(1, 1)]
#[case(2, 1)]
#[case(3, 2)]
#[case(4, 3)]
#[trace]
fn should_clear_count(#[case] initial_value: i32, #[case] step: u32) {
let mut count = Count::new(initial_value, step);
count.clear();
assert_eq!(count.value(), 0);
}
}

View File

@@ -0,0 +1,58 @@
use wasm_bindgen_test::*;
wasm_bindgen_test_configure!(run_in_browser);
use counter_without_macros as counter;
use leptos::*;
use web_sys::HtmlElement;
#[wasm_bindgen_test]
fn inc() {
mount_to_body(|cx| {
counter::view(
cx,
counter::Props {
initial_value: 0,
step: 1,
},
)
});
let document = leptos::document();
let div = document.query_selector("div").unwrap().unwrap();
let clear = div
.first_child()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
let dec = clear
.next_sibling()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
let text = dec
.next_sibling()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
let inc = text
.next_sibling()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
inc.click();
inc.click();
assert_eq!(text.text_content(), Some("Value: 2!".to_string()));
dec.click();
dec.click();
dec.click();
dec.click();
assert_eq!(text.text_content(), Some("Value: -2!".to_string()));
clear.click();
assert_eq!(text.text_content(), Some("Value: 0!".to_string()));
}

View File

@@ -1,86 +0,0 @@
use counter_without_macros::counter;
use leptos::*;
use pretty_assertions::assert_eq;
use wasm_bindgen::JsCast;
use wasm_bindgen_test::*;
use web_sys::HtmlElement;
wasm_bindgen_test_configure!(run_in_browser);
#[wasm_bindgen_test]
fn should_increment_counter() {
open_counter();
click_increment();
click_increment();
assert_eq!(see_text(), Some("Value: 2!".to_string()));
}
#[wasm_bindgen_test]
fn should_decrement_counter() {
open_counter();
click_decrement();
click_decrement();
assert_eq!(see_text(), Some("Value: -2!".to_string()));
}
#[wasm_bindgen_test]
fn should_clear_counter() {
open_counter();
click_increment();
click_increment();
click_clear();
assert_eq!(see_text(), Some("Value: 0!".to_string()));
}
fn open_counter() {
remove_existing_counter();
mount_to_body(move |cx| counter(cx, 0, 1));
}
fn remove_existing_counter() {
if let Some(counter) =
leptos::document().query_selector("body div").unwrap()
{
counter.remove();
}
}
fn click_clear() {
click_text("Clear");
}
fn click_decrement() {
click_text("-1");
}
fn click_increment() {
click_text("+1");
}
fn click_text(text: &str) {
find_by_text(text).click();
}
fn see_text() -> Option<String> {
find_by_text("Value: ").text_content()
}
fn find_by_text(text: &str) -> HtmlElement {
let xpath = format!("//*[text()='{}']", text);
let document = leptos::document();
document
.evaluate(&xpath, &document)
.unwrap()
.iterate_next()
.unwrap()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap()
}

View File

@@ -6,10 +6,9 @@ edition = "2021"
[dependencies]
leptos = { path = "../../leptos" }
log = "0.4"
console_log = "1"
console_log = "0.2"
console_error_panic_hook = "0.1.7"
[dev-dependencies]
wasm-bindgen-test = "0.3.0"
wasm-bindgen = "0.2"
web-sys = "0.3"

View File

@@ -1,8 +1,3 @@
extend = [
{ path = "../cargo-make/common.toml" },
{ path = "../cargo-make/wasm-web-test.toml" },
]
[tasks.build]
command = "cargo"
args = ["+nightly", "build-all-features"]

View File

@@ -38,7 +38,7 @@ pub fn Counters(cx: Scope) -> impl IntoView {
};
view! { cx,
<div>
<>
<button on:click=add_counter>
"Add Counter"
</button>
@@ -72,7 +72,7 @@ pub fn Counters(cx: Scope) -> impl IntoView {
}
/>
</ul>
</div>
</>
}
}

View File

@@ -1,4 +1,4 @@
use counters::Counters;
use counters::{Counters, CountersProps};
use leptos::*;
fn main() {

View File

@@ -0,0 +1,113 @@
use wasm_bindgen_test::*;
wasm_bindgen_test_configure!(run_in_browser);
use leptos::*;
use web_sys::HtmlElement;
use counters::{Counters, CountersProps};
#[wasm_bindgen_test]
fn inc() {
mount_to_body(|cx| view! { cx, <Counters/> });
let document = leptos::document();
let div = document.query_selector("div").unwrap().unwrap();
let add_counter = div
.first_child()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
// add 3 counters
add_counter.click();
add_counter.click();
add_counter.click();
// check HTML
assert_eq!(div.inner_html(), "<button>Add Counter</button><button>Add 1000 Counters</button><button>Clear Counters</button><p>Total: <span>0</span> from <span>3</span> counters.</p><ul><li><button>-1</button><input type=\"text\"><span>0</span><button>+1</button><button>x</button></li><li><button>-1</button><input type=\"text\"><span>0</span><button>+1</button><button>x</button></li><li><button>-1</button><input type=\"text\"><span>0</span><button>+1</button><button>x</button></li></ul>");
let counters = div
.query_selector("ul")
.unwrap()
.unwrap()
.unchecked_into::<HtmlElement>()
.children();
// click first counter once, second counter twice, etc.
// `NodeList` isn't a `Vec` so we iterate over it in this slightly awkward way
for idx in 0..counters.length() {
let counter = counters.item(idx).unwrap();
let inc_button = counter
.first_child()
.unwrap()
.next_sibling()
.unwrap()
.next_sibling()
.unwrap()
.next_sibling()
.unwrap()
.unchecked_into::<HtmlElement>();
for _ in 0..=idx {
inc_button.click();
}
}
assert_eq!(div.inner_html(), "<button>Add Counter</button><button>Add 1000 Counters</button><button>Clear Counters</button><p>Total: <span>6</span> from <span>3</span> counters.</p><ul><li><button>-1</button><input type=\"text\"><span>1</span><button>+1</button><button>x</button></li><li><button>-1</button><input type=\"text\"><span>2</span><button>+1</button><button>x</button></li><li><button>-1</button><input type=\"text\"><span>3</span><button>+1</button><button>x</button></li></ul>");
// remove the first counter
counters
.item(0)
.unwrap()
.last_child()
.unwrap()
.unchecked_into::<HtmlElement>()
.click();
assert_eq!(div.inner_html(), "<button>Add Counter</button><button>Add 1000 Counters</button><button>Clear Counters</button><p>Total: <span>5</span> from <span>2</span> counters.</p><ul><li><button>-1</button><input type=\"text\"><span>2</span><button>+1</button><button>x</button></li><li><button>-1</button><input type=\"text\"><span>3</span><button>+1</button><button>x</button></li></ul>");
// decrement all by 1
for idx in 0..counters.length() {
let counter = counters.item(idx).unwrap();
let dec_button = counter
.first_child()
.unwrap()
.unchecked_into::<HtmlElement>();
dec_button.click();
}
run_scope(create_runtime(), move |cx| {
// we can use RSX in test comparisons!
// note that if RSX template creation is bugged, this probably won't catch it
// (because the same bug will be reproduced in both sides of the assertion)
// so I use HTML tests for most internal testing like this
// but in user-land testing, RSX comparanda are cool
assert_eq!(
div.outer_html(),
view! { cx,
<div>
<button>"Add Counter"</button>
<button>"Add 1000 Counters"</button>
<button>"Clear Counters"</button>
<p>"Total: "<span>"3"</span>" from "<span>"2"</span>" counters."</p>
<ul>
<li>
<button>"-1"</button>
<input type="text"/>
<span>"1"</span>
<button>"+1"</button>
<button>"x"</button>
</li>
<li>
<button>"-1"</button>
<input type="text"/>
<span>"2"</span>
<button>"+1"</button>
<button>"x"</button>
</li>
</ul>
</div>
}
.outer_html()
);
});
}

View File

@@ -1,120 +0,0 @@
use wasm_bindgen::JsCast;
use wasm_bindgen_test::*;
wasm_bindgen_test_configure!(run_in_browser);
use counters::Counters;
use leptos::*;
use web_sys::HtmlElement;
#[wasm_bindgen_test]
fn inc() {
mount_to_body(|cx| view! { cx, <Counters/> });
let document = leptos::document();
let div = document.query_selector("div").unwrap().unwrap();
let add_counter = div
.first_child()
.unwrap()
.dyn_into::<HtmlElement>()
.unwrap();
// add 3 counters
add_counter.click();
add_counter.click();
add_counter.click();
// check HTML
assert_eq!(
div.inner_html(),
"<button>Add Counter</button><button>Add 1000 \
Counters</button><button>Clear Counters</button><p>Total: <span><!-- \
<DynChild> -->0<!-- </DynChild> --></span> from <span><!-- \
<DynChild> -->3<!-- </DynChild> --></span> counters.</p><ul><!-- \
<Each> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->0<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->0<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->0<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- </Each> --></ul>"
);
let counters = div
.query_selector("ul")
.unwrap()
.unwrap()
.unchecked_into::<HtmlElement>()
.children();
// click first counter once, second counter twice, etc.
// `NodeList` isn't a `Vec` so we iterate over it in this slightly awkward way
for idx in 0..counters.length() {
let counter = counters.item(idx).unwrap();
let inc_button = counter
.first_child()
.unwrap()
.next_sibling()
.unwrap()
.next_sibling()
.unwrap()
.next_sibling()
.unwrap()
.unchecked_into::<HtmlElement>();
for _ in 0..=idx {
inc_button.click();
}
}
assert_eq!(
div.inner_html(),
"<button>Add Counter</button><button>Add 1000 \
Counters</button><button>Clear Counters</button><p>Total: <span><!-- \
<DynChild> -->6<!-- </DynChild> --></span> from <span><!-- \
<DynChild> -->3<!-- </DynChild> --></span> counters.</p><ul><!-- \
<Each> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->1<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->2<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->3<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- </Each> --></ul>"
);
// remove the first counter
counters
.item(0)
.unwrap()
.last_child()
.unwrap()
.unchecked_into::<HtmlElement>()
.click();
assert_eq!(
div.inner_html(),
"<button>Add Counter</button><button>Add 1000 \
Counters</button><button>Clear Counters</button><p>Total: <span><!-- \
<DynChild> -->5<!-- </DynChild> --></span> from <span><!-- \
<DynChild> -->2<!-- </DynChild> --></span> counters.</p><ul><!-- \
<Each> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->2<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- <EachItem> --><!-- <Counter> \
--><li><button>-1</button><input type=\"text\"><span><!-- <DynChild> \
-->3<!-- </DynChild> \
--></span><button>+1</button><button>x</button></li><!-- </Counter> \
--><!-- </EachItem> --><!-- </Each> --></ul>"
);
}

View File

@@ -6,7 +6,7 @@ edition = "2021"
[dependencies]
leptos = { path = "../../leptos", features = ["stable"] }
log = "0.4"
console_log = "1"
console_log = "0.2"
console_error_panic_hook = "0.1.7"
[dev-dependencies]

View File

@@ -3,12 +3,8 @@ name = "error_boundary"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos" }
console_log = "1"
console_log = "0.2"
log = "0.4"
console_error_panic_hook = "0.1.7"

View File

@@ -26,7 +26,7 @@ pub fn App(cx: Scope) -> impl IntoView {
{move || errors.get()
.into_iter()
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
.collect_view(cx)
.collect::<Vec<_>>()
}
</ul>
</div>

View File

@@ -7,7 +7,7 @@ edition = "2021"
crate-type = ["cdylib", "rlib"]
[dependencies]
console_log = "1.0.0"
console_log = "0.2.0"
console_error_panic_hook = "0.1.7"
cfg-if = "1.0.0"
leptos = { path = "../../../leptos/leptos", default-features = false, features = [
@@ -28,6 +28,8 @@ thiserror = "1.0.38"
wasm-bindgen = "0.2"
[features]
default = ["csr"]
csr = ["leptos/csr", "leptos_meta/csr", "leptos_router/csr"]
hydrate = ["leptos/hydrate", "leptos_meta/hydrate", "leptos_router/hydrate"]
ssr = [
"dep:axum",
@@ -42,7 +44,7 @@ ssr = [
[package.metadata.cargo-all-features]
denylist = ["axum", "tower", "tower-http", "tokio", "leptos_axum"]
skip_feature_sets = [["ssr", "hydrate"]]
skip_feature_sets = [["csr", "ssr"], ["csr", "hydrate"], ["ssr", "hydrate"]]
[package.metadata.leptos]
# The name used by wasm-bindgen/cargo-leptos for the JS/WASM bundle. Defaults to the crate name

View File

@@ -70,8 +70,8 @@ pub fn ExampleErrors(cx: Scope) -> impl IntoView {
</p>
<p>"The following <div> will always contain an error and cause this page to produce status 500. Check browser dev tools. "</p>
<div>
// note that the error boundaries could be placed above in the Router or lower down
// in a particular route. The generated errors on the entire page contribute to the
// note that the error boundries could be placed above in the Router or lower down
// in a particular route. The generated errors on the entire page contribue to the
// final status code sent by the server when producing ssr pages.
<ErrorBoundary fallback=|cx, errors| view!{cx, <ErrorTemplate errors=errors/>}>
<ReturnsError/>

View File

@@ -3,18 +3,15 @@ name = "fetch"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
anyhow = "1.0.58"
leptos = { path = "../../leptos" }
reqwasm = "0.5"
reqwasm = "0.5.0"
serde = { version = "1", features = ["derive"] }
log = "0.4"
console_log = "1"
console_error_panic_hook = "0.1"
thiserror = "1"
console_log = "0.2"
console_error_panic_hook = "0.1.7"
[dev-dependencies]
wasm-bindgen-test = "0.3"
wasm-bindgen-test = "0.3.0"

View File

@@ -1,50 +1,38 @@
use anyhow::Result;
use leptos::*;
use serde::{Deserialize, Serialize};
use thiserror::Error;
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Cat {
url: String,
}
#[derive(Error, Clone, Debug)]
pub enum FetchError {
#[error("Please request more than zero cats.")]
NonZeroCats,
#[error("Error loading data from serving.")]
Request,
#[error("Error deserializaing cat data from request.")]
Json
}
async fn fetch_cats(count: u32) -> Result<Vec<String>, FetchError> {
async fn fetch_cats(count: u32) -> Result<Vec<String>> {
if count > 0 {
// make the request
let res = reqwasm::http::Request::get(&format!(
"https://api.thecatapi.com/v1/images/search?limit={count}",
))
.send()
.await
.map_err(|_| FetchError::Request)?
.await?
// convert it to JSON
.json::<Vec<Cat>>()
.await
.map_err(|_| FetchError::Json)?
.await?
// extract the URL field for each cat
.into_iter()
.map(|cat| cat.url)
.collect::<Vec<_>>();
Ok(res)
} else {
Err(FetchError::NonZeroCats)
Ok(vec![])
}
}
pub fn fetch_example(cx: Scope) -> impl IntoView {
let (cat_count, set_cat_count) = create_signal::<u32>(cx, 0);
let (cat_count, set_cat_count) = create_signal::<u32>(cx, 1);
// we use local_resource here because
// 1) our error type isn't serializable/deserializable
// 1) anyhow::Result isn't serializable/deserializable
// 2) we're not doing server-side rendering in this example anyway
// (during SSR, create_resource will begin loading on the server and resolve on the client)
let cats = create_local_resource(cx, cat_count, fetch_cats);
@@ -54,8 +42,8 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
errors.with(|errors| {
errors
.iter()
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li> })
.collect_view(cx)
.map(|(_, e)| view! { cx, <li>{e.to_string()}</li>})
.collect::<Vec<_>>()
})
};
@@ -72,12 +60,11 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
// and by using the ErrorBoundary fallback to catch Err(_)
// so we'll just implement our happy path and let the framework handle the rest
let cats_view = move || {
cats.read(cx).map(|data| {
data.map(|data| {
data.iter()
.map(|s| view! { cx, <span>{s}</span> })
.collect_view(cx)
})
cats.with(cx, |data| {
data.iter()
.flatten()
.map(|cat| view! { cx, <img src={cat}/> })
.collect::<Vec<_>>()
})
};
@@ -85,9 +72,8 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
<div>
<label>
"How many cats would you like?"
<input
type="number"
prop:value=move || cat_count.get().to_string()
<input type="number"
prop:value={move || cat_count.get().to_string()}
on:input=move |ev| {
let val = event_target_value(&ev).parse::<u32>().unwrap_or(0);
set_cat_count(val);
@@ -95,9 +81,7 @@ pub fn fetch_example(cx: Scope) -> impl IntoView {
/>
</label>
<ErrorBoundary fallback>
<Transition fallback=move || {
view! { cx, <div>"Loading (Suspense Fallback)..."</div> }
}>
<Transition fallback=move || view! { cx, <div>"Loading (Suspense Fallback)..."</div>}>
{cats_view}
</Transition>
</ErrorBoundary>

View File

@@ -6,14 +6,10 @@ edition = "2021"
[lib]
crate-type = ["cdylib", "rlib"]
[profile.release]
codegen-units = 1
lto = true
[dependencies]
actix-files = { version = "0.6", optional = true }
actix-web = { version = "4", optional = true, features = ["macros"] }
console_log = "1"
console_log = "0.2"
console_error_panic_hook = "0.1"
cfg-if = "1"
leptos = { path = "../../leptos", default-features = false, features = [

View File

@@ -38,7 +38,7 @@ pub fn Stories(cx: Scope) -> impl IntoView {
let (pending, set_pending) = create_signal(cx, false);
let hide_more_link =
move |cx| pending() || stories.read(cx).unwrap_or(None).unwrap_or_default().len() < 28;
move || pending() || stories.read(cx).unwrap_or(None).unwrap_or_default().len() < 28;
view! {
cx,
@@ -65,20 +65,16 @@ pub fn Stories(cx: Scope) -> impl IntoView {
}}
</span>
<span>"page " {page}</span>
<Transition
fallback=move || view! { cx, <p>"Loading..."</p> }
<span class="page-link"
class:disabled=hide_more_link
aria-hidden=hide_more_link
>
<span class="page-link"
class:disabled=move || hide_more_link(cx)
aria-hidden=move || hide_more_link(cx)
<a href=move || format!("/{}?page={}", story_type(), page() + 1)
aria-label="Next Page"
>
<a href=move || format!("/{}?page={}", story_type(), page() + 1)
aria-label="Next Page"
>
"more >"
</a>
</span>
</Transition>
"more >"
</a>
</span>
</div>
<main class="news-list">
<div>

View File

@@ -6,12 +6,8 @@ edition = "2021"
[lib]
crate-type = ["cdylib", "rlib"]
[profile.release]
codegen-units = 1
lto = true
[dependencies]
console_log = "1.0.0"
console_log = "0.2.0"
console_error_panic_hook = "0.1.7"
cfg-if = "1.0.0"
leptos = { path = "../../leptos", default-features = false, features = [

View File

@@ -1,10 +1,6 @@
[workspace]
members = ["client", "api-boundary", "server"]
[profile.release]
codegen-units = 1
lto = true
[patch.crates-io]
leptos = { path = "../../leptos" }
leptos_router = { path = "../../router" }

View File

@@ -12,7 +12,7 @@ leptos_router = { version = "0.2.0-alpha2", features = ["stable", "csr"] }
log = "0.4"
console_error_panic_hook = "0.1"
console_log = "1"
console_log = "0.2"
gloo-net = "0.2"
gloo-storage = "0.2"
serde = "1.0"

View File

@@ -1,3 +1,3 @@
[[proxy]]
rewrite = "/api/"
backend = "http://127.0.0.1:3000/"
backend = "http://0.0.0.0:3000/"

View File

@@ -3,13 +3,9 @@ name = "parent-child"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
leptos = { path = "../../leptos" }
console_log = "1"
console_log = "0.2"
log = "0.4"
console_error_panic_hook = "0.1.7"
web-sys = "0.3"

View File

@@ -3,12 +3,8 @@ name = "router"
version = "0.1.0"
edition = "2021"
[profile.release]
codegen-units = 1
lto = true
[dependencies]
console_log = "1"
console_log = "0.2"
log = "0.4"
leptos = { path = "../../leptos" }
leptos_router = { path = "../../router", features = ["csr"] }

View File

@@ -3,7 +3,17 @@
<head>
<link data-trunk rel="rust" data-wasm-opt="z"/>
<link data-trunk rel="icon" type="image/ico" href="/public/favicon.ico"/>
<link data-trunk rel="css" href="style.css"/>
<style>
a[aria-current] {
font-weight: bold;
}
.contact, .contact-list {
border: 1px solid #c0c0c0;
border-radius: 3px;
padding: 1rem;
}
</style>
</head>
<body></body>
</html>
</html>

View File

@@ -27,13 +27,20 @@ pub fn RouterExample(cx: Scope) -> impl IntoView {
<A href="redirect-home">"Redirect to Home"</A>
</nav>
<main>
<AnimatedRoutes
outro="slideOut"
intro="slideIn"
outro_back="slideOutBack"
intro_back="slideInBack"
>
<ContactRoutes/>
<Routes>
<Route
path=""
view=move |cx| view! { cx, <ContactList/> }
>
<Route
path=":id"
view=move |cx| view! { cx, <Contact/> }
/>
<Route
path="/"
view=move |_| view! { cx, <p>"Select a contact."</p> }
/>
</Route>
<Route
path="about"
view=move |cx| view! { cx, <About/> }
@@ -46,33 +53,12 @@ pub fn RouterExample(cx: Scope) -> impl IntoView {
path="redirect-home"
view=move |cx| view! { cx, <Redirect path="/"/> }
/>
</AnimatedRoutes>
</Routes>
</main>
</Router>
}
}
// You can define other routes in their own component.
// Use a #[component(transparent)] that returns a <Route/>.
#[component(transparent)]
pub fn ContactRoutes(cx: Scope) -> impl IntoView {
view! { cx,
<Route
path=""
view=move |cx| view! { cx, <ContactList/> }
>
<Route
path=":id"
view=move |cx| view! { cx, <Contact/> }
/>
<Route
path="/"
view=move |_| view! { cx, <p>"Select a contact."</p> }
/>
</Route>
}
}
#[component]
pub fn ContactList(cx: Scope) -> impl IntoView {
log::debug!("rendering <ContactList/>");
@@ -97,7 +83,7 @@ pub fn ContactList(cx: Scope) -> impl IntoView {
<li><A href=contact.id.to_string()><span>{&contact.first_name} " " {&contact.last_name}</span></A></li>
}
})
.collect_view(cx)
.collect::<Vec<_>>()
})
};
@@ -107,11 +93,7 @@ pub fn ContactList(cx: Scope) -> impl IntoView {
<Suspense fallback=move || view! { cx, <p>"Loading contacts..."</p> }>
{move || view! { cx, <ul>{contacts}</ul>}}
</Suspense>
<AnimatedOutlet
class="outlet"
outro="fadeOut"
intro="fadeIn"
/>
<Outlet/>
</div>
}
}

View File

@@ -1,95 +0,0 @@
a[aria-current] {
font-weight: bold;
}
.outlet {
border: 1px dotted grey;
}
.contact, .contact-list {
border: 1px solid #c0c0c0;
border-radius: 3px;
padding: 1rem;
}
.fadeIn {
animation: 0.5s fadeIn forwards;
}
.fadeOut {
animation: 0.5s fadeOut forwards;
}
@keyframes fadeIn {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
@keyframes fadeOut {
from {
opacity: 1;
}
to {
opacity: 0;
}
}
.slideIn {
animation: 0.25s slideIn forwards;
}
.slideOut {
animation: 0.25s slideOut forwards;
}
@keyframes slideIn {
from {
transform: translate(100vw, 0);
}
to {
transform: translate(0px, 0px);
}
}
@keyframes slideOut {
from {
transform: translate(0px, 0px);
}
to {
transform: translate(-100vw, 0);
}
}
.slideInBack {
animation: 0.25s slideInBack forwards;
}
.slideOutBack {
animation: 0.25s slideOutBack forwards;
}
@keyframes slideInBack {
from {
transform: translate(-100vw, 0);
}
to {
transform: translate(0px, 0px);
}
}
@keyframes slideOutBack {
from {
transform: translate(0px, 0px);
}
to {
transform: translate(100vw, 0);
}
}

View File

@@ -8,7 +8,7 @@ crate-type = ["cdylib", "rlib"]
[dependencies]
anyhow = "1.0.66"
console_log = "1.0.0"
console_log = "0.2.0"
rand = { version = "0.8.5", features = ["min_const_gen"], optional = true }
console_error_panic_hook = "0.1.7"
futures = "0.3.25"
@@ -43,6 +43,8 @@ bcrypt = { version = "0.14", optional = true }
async-trait = { version = "0.1.64", optional = true }
[features]
default = ["csr"]
csr = ["leptos/csr", "leptos_meta/csr", "leptos_router/csr"]
hydrate = ["leptos/hydrate", "leptos_meta/hydrate", "leptos_router/hydrate"]
ssr = [
"dep:axum",
@@ -63,7 +65,7 @@ ssr = [
[package.metadata.cargo-all-features]
denylist = ["axum", "tower", "tower-http", "tokio", "sqlx", "leptos_axum"]
skip_feature_sets = [["ssr", "hydrate"]]
skip_feature_sets = [["csr", "ssr"], ["csr", "hydrate"], ["ssr", "hydrate"]]
[package.metadata.leptos]
# The name used by wasm-bindgen/cargo-leptos for the JS/WASM bundle. Defaults to the crate name

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@@ -1,15 +1,12 @@
{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1681202837,
"narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
"lastModified": 1676283394,
"narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "cfacdce06f30d2b68473a46042957675eebb3401",
"rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
"type": "github"
},
"original": {
@@ -19,15 +16,12 @@
}
},
"flake-utils_2": {
"inputs": {
"systems": "systems_2"
},
"locked": {
"lastModified": 1681202837,
"narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
"lastModified": 1659877975,
"narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "cfacdce06f30d2b68473a46042957675eebb3401",
"rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
"type": "github"
},
"original": {
@@ -67,11 +61,11 @@
]
},
"locked": {
"lastModified": 1681525152,
"narHash": "sha256-KzI+ILcmU03iFWtB+ysPqtNmp8TP8v1BBReTuPP8MJY=",
"lastModified": 1677292251,
"narHash": "sha256-D+6q5Z2MQn3UFJtqsM5/AvVHi3NXKZTIMZt1JGq/spA=",
"owner": "oxalica",
"repo": "rust-overlay",
"rev": "b6f8d87208336d7cb85003b2e439fc707c38f92a",
"rev": "34cdbf6ad480ce13a6a526f57d8b9e609f3d65dc",
"type": "github"
},
"original": {
@@ -79,36 +73,6 @@
"repo": "rust-overlay",
"type": "github"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",

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@@ -6,7 +6,7 @@ if #[cfg(feature = "ssr")] {
use axum::{
response::{Response, IntoResponse},
routing::{post, get},
extract::{Path, Extension, RawQuery},
extract::{Path, Extension},
http::{Request, header::HeaderMap},
body::Body as AxumBody,
Router,
@@ -22,12 +22,11 @@ if #[cfg(feature = "ssr")] {
use axum_database_sessions::{SessionConfig, SessionLayer, SessionStore};
use axum_sessions_auth::{AuthSessionLayer, AuthConfig, SessionSqlitePool};
async fn server_fn_handler(Extension(pool): Extension<SqlitePool>, auth_session: AuthSession, path: Path<String>, headers: HeaderMap, raw_query: RawQuery,
request: Request<AxumBody>) -> impl IntoResponse {
async fn server_fn_handler(Extension(pool): Extension<SqlitePool>, auth_session: AuthSession, path: Path<String>, headers: HeaderMap, request: Request<AxumBody>) -> impl IntoResponse {
log!("{:?}", path);
handle_server_fns_with_context(path, headers, raw_query, move |cx| {
handle_server_fns_with_context(path, headers, move |cx| {
provide_context(cx, auth_session.clone());
provide_context(cx, pool.clone());
}, request).await
@@ -74,7 +73,7 @@ if #[cfg(feature = "ssr")] {
// build our application with a route
let app = Router::new()
.route("/api/*fn_name", get(server_fn_handler).post(server_fn_handler))
.route("/api/*fn_name", post(server_fn_handler))
.leptos_routes_with_handler(routes, get(leptos_routes_handler) )
.fallback(file_and_error_handler)
.layer(AuthSessionLayer::<User, i64, SessionSqlitePool, SqlitePool>::new(Some(pool.clone()))

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@@ -241,11 +241,11 @@ pub fn Todos(cx: Scope) -> impl IntoView {
todos.read(cx)
.map(move |todos| match todos {
Err(e) => {
view! { cx, <pre class="error">"Server Error: " {e.to_string()}</pre>}.into_view(cx)
vec![view! { cx, <pre class="error">"Server Error: " {e.to_string()}</pre>}.into_any()]
}
Ok(todos) => {
if todos.is_empty() {
view! { cx, <p>"No tasks were found."</p> }.into_view(cx)
vec![view! { cx, <p>"No tasks were found."</p> }.into_any()]
} else {
todos
.into_iter()
@@ -266,8 +266,9 @@ pub fn Todos(cx: Scope) -> impl IntoView {
</ActionForm>
</li>
}
.into_any()
})
.collect_view(cx)
.collect::<Vec<_>>()
}
}
})
@@ -286,7 +287,7 @@ pub fn Todos(cx: Scope) -> impl IntoView {
<li class="pending">{move || submission.input.get().map(|data| data.title) }</li>
}
})
.collect_view(cx)
.collect::<Vec<_>>()
};
view! {

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

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