43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
use dioxus_core::prelude::*;
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use dioxus_signals::ReactiveContext;
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/// `use_effect` will subscribe to any changes in the signal values it captures
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/// effects will always run after first mount and then whenever the signal values change
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/// If the use_effect call was skipped due to an early return, the effect will no longer activate.
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/// ```rust
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/// fn app() -> Element {
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/// let mut count = use_signal(|| 0);
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/// //the effect runs again each time count changes
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/// use_effect(move || println!("Count changed to {count}"));
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///
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/// rsx! {
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/// h1 { "High-Five counter: {count}" }
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/// button { onclick: move |_| count += 1, "Up high!" }
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/// button { onclick: move |_| count -= 1, "Down low!" }
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/// }
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/// }
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/// ```
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#[track_caller]
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pub fn use_effect(mut callback: impl FnMut() + 'static) {
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// let mut run_effect = use_hook(|| CopyValue::new(true));
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// use_hook_did_run(move |did_run| run_effect.set(did_run));
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let location = std::panic::Location::caller();
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use_hook(|| {
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spawn(async move {
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let rc = ReactiveContext::new_with_origin(location);
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loop {
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// Run the effect
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rc.run_in(&mut callback);
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// Wait for context to change
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rc.changed().await;
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// Wait for the dom the be finished with sync work
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wait_for_next_render().await;
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}
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});
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});
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}
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