Module callback

Interactivity for handling JS events.

WSDOM is one-way, so JS code cannot directly call Rust code. Instead, we adopt a mechanism based on async.

The new_callback function returns a Rust Stream s and a JavaScript object f that can be called (i.e. a function/closure). Each time f is called like f(arg), the Rust stream will yield the arg object.

async fn example(browser: &Browser, button: wsdom::dom::HTMLButtonElement) {
    let (mut stream, func) = wsdom::callback::new_callback::<wsdom::dom::MouseEvent>(&browser);
    button.add_event_listener(&"click", &func, &wsdom::undefined());

    use futures_util::StreamExt;
    let _click_event: Option<wsdom::dom::MouseEvent> = stream.next().await;
    println!("the button was clicked!");
}

Structs

Callback

Listens for JavaScript callbacks.

Functions

new_callback

Create a new Callback and a corresponding JavaScript function.