1
var isAnagram = function (s, t) {
2
  if (s.length !== t.length) return false;
3

4
  let charFreq = {};
5

6
  for (let char of s) {
7
    charFreq[char] ? (charFreq[char] += 1) : (charFreq[char] = 1);
8
  }
9

10
  for (let char of t) {
11
    if (!charFreq[char]) return false;
12
    charFreq[char] -= 1;
13
  }
14
  return true;
15
};