Function web_thread::web::has_spawn_support

pub fn has_spawn_support() -> bool

Available on Web only.

Returns true if the main thread supports spawning threads.

Notes

web-thread will consider the first thread it finds itself in the “main thread”. If Wasm is instantiated in a dedicated worker, it will consider it as the “main thread”.

Currently only two thread types are known to support spawning threads:

• Window (often called the main thread on Web).
• Dedicated worker.

Additionally, the following is required to allow spawning threads:

• The atomics target feature is enabled.
• The site needs to be cross-origin isolated.

Example

fn schedule_fun(f: impl 'static + FnOnce() + Send) {
	if web_thread::web::has_spawn_support() {
		web_thread::spawn(f);
	} else {
		wasm_bindgen_futures::spawn_local(async { f() });
	}
}

schedule_fun(|| web_sys::console::log_1(&"Are we having fun yet?".into()));