string repeat javascript

var a="a";
var aaa=a.repeat(3); // "aaa"
// best implementation
repeatStr = (n, s) => s.repeat(n);function repeatStringNumTimes(string, times) {
  var repeatedString = "";
  while (times > 0) {
    repeatedString += string;
    times--;
  }
  return repeatedString;
}
repeatStringNumTimes("abc", 3);repeatStr = (n, s) => s.repeat(n);function repeatStr (n, s) {
  return s.repeat(n)
}
/////////////////////////////similar///////////////////////////////////////////
repeatStr = (n, s) => s.repeat(n);