Make App::run non-blocking on web

[Amex1048]

Hi! I managed to export my rust function to js via wasm_bindgen, but the question is if the function call would be non-blocking. Docs state, that I can make App::run non-blocking by setting WinitSettings::return_from_run flag, but it is not supported on web. Is there any other way to make my js API non-blocking?

[daxpedda]

You can't really block on Web.

The way it currently works is that App::run() (which calls winit::event_loop::EventLoop::run()) will throw (as in JS throw) which completely exits Rust. The rest of the application will continue working because it's callback based, e.g. the browser will call back into Rust when things happen.

So I'm not entirely sure what it is you are trying to do, but calling your Rust function which calls App::run() from JS won't block, but it will throw.

[Amex1048]

Thanks!

[maximetinu]

That is what this Winit exception, Using exceptions for control flow, don't mind me. This isn't actually an error!, does