Function review::use_effect
source · [−]pub fn use_effect<E: Fn() -> Option<C> + 'static, C: Fn() + 'static, D: Any + PartialEq>(
effect: E,
dependencies: Option<D>
) -> UseEffectBuilder<E, D>
Expand description
The Effect Hook lets you perform side effects in components
Examples
Without cleanup function and without dependencies
#[component(Example)]
pub fn example() -> VNode {
use_effect(
|| {
log::info!("hello!");
None::<fn()>
},
None::<()>
);
Div.into()
}
With cleanup function and without dependencies
#[component(Example)]
pub fn example() -> VNode {
use_effect(
|| {
log::info!("hello!");
Some(|| log::info!("clean"))
},
None::<()>
);
Div.into()
}
With cleanup function and dependencies
#[component(Example)]
pub fn example() -> VNode {
use_effect(
|| {
log::info!("hello!");
Some(|| log::info!("clean"))
},
Some(()) // run only one time because () never change
);
Div.into()
}