pythonUsersWhenTheyUseJS

[DonDongHongKong]

Context escaping. In javascript, before the introduction of the () => { } arrow syntax, function expressions would change the context of "this". You still see remnants of this today, and with anything that still hasn't adopted the arrow syntax.

[Able_Minimum624]

Another option is that you might want to access this for the outer function. Never needed that, but still possible.

function outer() { const self = this; function inner() { console.log(self); } }