mrdoob/eventtarget.js — comment on commit 33c0535ea5d3ccc05481a81624358c82ae5ba877
File: README.md line 25
By erisdiscord:

Why? `EventTarget.call( this )` already attaches the event methods, does it not? That would appear to make one of the two steps redundant.

Personally, I'd say it's this step, because calling the `EventTarget` constructor allows it to behave as a mixin, but then I would question why it's even a constructor function.