Build an Array With Stack Operations LeetCode solution in JavaScript

1
/**
2
 * @param {number[]} target
3
 * @param {number} n
4
 * @return {string[]}
5
 */
6
var buildArray = function (target, n) {
7
  let arr = [];
8
  let index = 0;
9
  for (let i = 1; i <= target[target.length - 1]; i++) {
10
    if (target[index] == i) {
11
      arr.push("Push");
12
      index++;
13
    } else {
14
      arr.push("Push");
15
      arr.push("Pop");
16
    }
17
  }
18
  return arr;
19
};