Group Anagrams LeetCode solution in JavaScript

1
var groupAnagrams = function (strs) {
2
  let totalResults = [];
3
  let grouped = new Map();
4

5
  for (let i = 0; i < strs.length; i++) {
6
    let results = [];
7
    let res = strs[i];
8

9
    let sortedStr = strs[i].split("").sort().join("");
10
    let value = grouped.get(sortedStr);
11

12
    if (value !== undefined) {
13
      grouped.set(sortedStr, [...value, strs[i]]);
14
    } else {
15
      grouped.set(sortedStr, [strs[i]]);
16
    }
17
  }
18

19
  for (let [key, value] of grouped) {
20
    totalResults.push(grouped.get(key));
21
  }
22

23
  return totalResults;
24
};