EventTarget interface not generic

[carlpaten]

EventTarget objects expose an addEventListener method, which registers an EventListener (or EventListenerObject) with the target. An EventListener is simply a function from some Event to void; however, many EventTarget objects pass an argument to their EventListeners with more structure than just Event.

This is a problem because we completely lose type safety when using addEventListener. We're forced to let the argument to the EventListener be any; coercing it to a more specific type gives an error.

EventTarget objects should be generic on the type of events being emitted. This would be a breaking change, though.

[RyanCavanaugh]

This is a problem because we completely lose type safety when using addEventListener. We're forced to let the argument to the EventListener be any

Can you post some examples of how this happens? In general you should be able to provide a function that takes a more-specific type as an argument.

[mhegazy]

is this different from #299?

[danquirk]

Gonna call this a dupe of the issue Mohamed mentioned unless we get more info.