下面是Timer组件的伪代码示例：

enum SecondsStateAction {
    Increment,
}

#[derive(Default)]
struct SecondsState {
    seconds: usize,
}

impl Reducible for SecondsState {
    /// Reducer Action Type
    type Action = SecondsStateAction;

    /// Reducer Function
    fn reduce(self: Rc<Self>, action: Self::Action) -> Rc<Self> {
        match action {
            SecondsStateAction::Increment => Self { seconds: self.seconds + 1 }.into(),
        }
    }
}

#[function_component(Timer)]
pub fn timer() -> Html {
    let seconds_state_handle = use_reducer(SecondsState::default);

    use_effect_with_deps(
        {
            let seconds_state_handle = seconds_state_handle.clone();

            move |_| {
                // i intervals get out of scope they get dropped and destroyed
                let interval = Interval::new(1000, move || seconds_state_handle.dispatch(SecondsStateAction::Increment));

                // So we move it into the clean up function, rust will consider this still being used and wont drop it
                // then we just drop it ourselves in the cleanup 
                move || drop(interval)
            }
        },
        (), // Only create the interval once per your component existence
    );

    html! {<h1>{*seconds_state_handle}{" seconds has passed since this component got rendered"}</h1>}
}

要了解有关代码中使用的钩子的更多信息，请访问https://yew.rs/docs/concepts/function-components/hooks#pre-defined-hooks