HowToDoAsynchronousEventDispatching.md

How to do asynchronous event dispatching?

Normally event dispatching using a EventDispatcher<TSender, TArgs> or SimpleEventDispatcher<TArgs> is a synchronous process. This might not be desirable because a long event handler can hold up the rest of the handlers from being executed. That's why dispatchers can dispatch asynchronously by calling dispatchAsync.

Example

Conside the following example:

QUnit.test('Testing simple event async dispatch', (assert) => {

    let dispatcher = new SimpleEventDispatcher<number>();

    let i = 0;

    dispatcher.subscribe((a) => {
        i = a;

        assert.equal(i, 1);
    });

    dispatcher.dispatchAsync(1);

    assert.equal(i, 0);
});

Dispatching is now done asynchronously.