Most common javascript functions/methods for leetcode or coding in general

As I started my journey to learning how to code(like three weeks ago), I’ve been grinding on codewars while on udemy learning the basics of js, hmtl, and css. My question is this: to the experienced javascript engineers, what were/are the most common functions/methods you use when you write code or want to solve a leetcode problem that you have noticed? For the most part, I’ve been using .map,.filter,.reduce,.find,.join, and .split. Is there any other ones that you would recommend to study and have the ins and outs memorized?