Feature Request: EventTarget Polyfill

[RiZKiT]

What

Adding a polyfill for EventTarget constructor, an EventEmitter for Javascript objects (e.g. for CustomElements or every other object), as a counterpart to DOM events.

Details

I stumbled upon EventTarget while reading https://medium.com/@zandaqo/eventtarget-the-future-of-javascript-event-systems-205ae32f5e6b.
It's not supported in IE and Edge, as can be seen here https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/EventTarget#Browser_compatibility.

Additional information

There is already a polyfill available at https://developer.mozilla.org/en-US/docs/Web/API/EventTarget#Simple_implementation_of_EventTarget and a copy of that as a npm module https://github.com/mattkrick/event-target-polyfill, https://www.npmjs.com/package/@mattkrick/event-target-polyfill.

[Vanilagy]

+1, please look into this.

[mhassan1]

EventTarget seems to be fully supported in IE9+. Is this still needed?