Function freya::prelude::use_effect

pub fn use_effect(callback: impl FnMut() + 'static) -> Effect

use_effect will subscribe to any changes in the signal values it captures effects will always run after first mount and then whenever the signal values change If the use_effect call was skipped due to an early return, the effect will no longer activate.

fn app() -> Element {
    let mut count = use_signal(|| 0);
    //the effect runs again each time count changes
    use_effect(move || println!("Count changed to {count}"));

    rsx! {
        h1 { "High-Five counter: {count}" }
        button { onclick: move |_| count += 1, "Up high!" }
        button { onclick: move |_| count -= 1, "Down low!" }
    }
}

With non-reactive dependencies

To add non-reactive dependencies, you can use the use_reactive hook.

Signals will automatically be added as dependencies, so you don’t need to call this method for them.

#[component]
fn Comp(count: u32) -> Element {
    // Because the memo subscribes to `count` by adding it as a dependency, the memo will rerun every time `count` changes.
    use_effect(use_reactive((&count,), |(count,)| println!("Manually manipulate the dom") ));

    todo!()
}