Function web_thread::web::spawn_async

pub fn spawn_async<F1, F2, T>(f: F1) -> JoinHandle<T>
where
    F1: 'static + FnOnce() -> F2 + Send,
    F2: 'static + Future<Output = T>,
    T: 'static + Send,

Available on Web only.

Async version of spawn().

Notes

Commonly a long-running thread is used by sending messages or tasks to it and blocking it when there is no work. Unfortunately this is often undesirable on the Web platform as it prevents yielding to the event loop.

Therefor being able to await the next task instead of blocking the thread is essential to build long-running threads on the Web platform.

Panics

If the main thread does not support spawning threads, see has_spawn_support().

Example

let (sender, receiver) = async_channel::unbounded::<usize>();

web_thread::web::spawn_async(move || async move {
	while let Ok(message) = receiver.recv().await {
		web_sys::console::log_1(&message.into());
	}
});

for message in 0..10 {
	sender.try_send(message).unwrap();
}