[scottharveyco]

That's what I have, a very small helper library that contains 5 or 6 functions that I use frequently like .closest(), .hideAll(), .showAll() etc.

My application doesn't use much JS so this seems reasonable to me instead of including a framework for a few functions.

[bzbarsky]

For what it's worth, https://caniuse.com/#feat=element-closest is supported by everyone except IE (and Opera Mini, I guess).

[Piskvorrr]

That's exactly the point! "Oh, you can code [a polyfill] yourself, and it will work. Mostly. Sort of. jQuery bad, reinventing the wheel good! Never mind that you originally went there to implement some business logic, let's get tangled in the myriad almost-almost-working combinations."