how to make a repeat in js code example

Example 1: js multiply string

let myString = 'test';

myString.repeat(3);		// 'testtesttest'

Example 2: JavaScript repeat character

var a="a";
var aaa=a.repeat(3); // "aaa"

Example 3: string repeat javascript

// best implementation
repeatStr = (n, s) => s.repeat(n);

Example 4: repeat js

repeatStr = (n, s) => s.repeat(n);