Add message event

[george-lim]

Adds the message event so that we can add event listeners to respond to messages sent from different origins, like service worker or web worker.

Docs: https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent

[Pauan]

Is this actually used for DOM nodes? It looks like it's used for Workers, WebSocket, WebRTC, etc.

dominator doesn't handle any of those things, it's only for DOM nodes.

[Pauan]

For things like WebSocket, there are other crates like gloo-net. For Workers there is gloo-worker, and for general event listening there is gloo-events:

let listener = EventListener::new(&window().unwrap(), "message", move |event| {
    ...
});

[george-lim]

You're right, I was basically only going to use it with .global_event. Seems like a bad idea to include that into Dominator when these events are focused more on DOM nodes. I'll just use gloo-events 👍