use_context can't get the context

[mahdi739]

This simple example panics on use_context line. Am I missing something? :

#[derive(Clone,Copy)]
pub struct State {
  pub counter: RwSignal<i32>
}
#[component]
fn App() -> impl IntoView {
  view! {
    <Provider value=State { counter: RwSignal::new(0) }>
      <button on:click=move |_| {
        let state = use_context::<State>().unwrap();
        state.counter.update(|i| *i += 1);
      }>"Click Me"</button>
      {
        let state = use_context::<State>().unwrap();
        state.counter
      }
    </Provider>
  }
}

[gbj]

Context is available in the body of a component, but is not available in things that run outside the component tree, like event listeners. You can use_context in the body of the component, and then move it into the event listener, instead.