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use yew::prelude::*;
use super::{use_effect_once, use_mut_latest};
/// A lifecycle hook that calls a function when the component will unmount.
///
/// # Example
///
/// ```rust
/// # use yew::prelude::*;
/// # use log::debug;
/// #
/// use yew_hooks::prelude::*;
///
/// #[function_component(Unmount)]
/// fn unmount() -> Html {
/// use_unmount(|| {
/// debug!("Running clean-up of effect on unmount");
/// });
///
/// html! {
/// <>
/// </>
/// }
/// }
/// ```
#[hook]
pub fn use_unmount<Callback>(callback: Callback)
where
Callback: FnOnce() + 'static,
{
let callback_ref = use_mut_latest(Some(callback));
use_effect_once(move || {
move || {
let callback_ref = callback_ref.current();
let callback = (*callback_ref.borrow_mut()).take();
if let Some(callback) = callback {
callback();
}
}
});
}