Number of Times Binary String Is Prefix-Aligned LeetCode solution in JavaScript

1
var numTimesAllBlue = function (flips) {
2
  const flipped = new Array(flips.length).fill(0);
3
  let prefixAlignedCount = 0;
4
  flips.forEach((i, step) => {
5
    flipped[i - 1] = 1;
6
    if (isPrefixAligned(step)) {
7
      ++prefixAlignedCount;
8
    }
9
  });
10
  return prefixAlignedCount;
11

12
  function isPrefixAligned(step) {
13
    for (let i = 0; i < flips.length; ++i) {
14
      if ((i < step && flipped[i] === 0) || (i > step && flipped[i] === 1)) {
15
        return false;
16
      }
17
    }
18
    return true;
19
  }
20
};