Как перевернуть слова на месте (in-place)?

function reverseWordsInPlace(chars) {
  const rev = (l, r) => {
    while (l < r) {
      [chars[l], chars[r]] = [chars[r], chars[l]];
      l++; r--;
    }
  };
  rev(0, chars.length - 1);
  let start = 0;
  for (let i = 0; i <= chars.length; i++) {
    if (i === chars.length || chars[i] === ' ') {
      rev(start, i - 1);
      start = i + 1;
    }
  }
  return chars;
}

reverseWordsInPlace([...'the sky is blue']);
// ['b','l','u','e',' ','i','s',' ','s','k','y',' ','t','h','e']