Sylvain Lesage

CanvasImageSource

EventTarget

Data structure with events

Map with default

Map with current

Non-empty Map

Hello deep-weak-map

Dummy variables

Grid map data structure

LayerStack

Data structure

What was the motivation to create this class, given the availability of the native EventTarget constructor and existing shims?

Fabian Iwand

😬 no. I don't know why I thought it was only an interface (i think this belief was based on the comments in https://observablehq.com/@mbostock/synchronized-views). Thanks A LOT for pointing me to the constructor! So: you're right, it's now totally pointless (at least the exercise helped me to understand the internals).

I just remove the dependency from 5-6 notebooks, and it works exactly the same. Thanks for simplifying my life :)

Sorry for putting you through this! 😅 Note that you may still need a shim (like https://github.com/mysticatea/event-target-shim) if you want to support Safari 13 or below both on iOS and macOS. Safari 14 was released in September 2020.

EventTarget constructor support: https://caniuse.com/mdn-api_eventtarget_eventtarget

OK, thanks for the complement. I think I will just use the native constructor, as it's for prototypes here.