2022js13k/js/libraries/ShufflePolyfill.js

Array.prototype.shuffle = function() {
    let currentIndex = this.length,  randomIndex;
  while (currentIndex != 0) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex--;
    [this[currentIndex], this[randomIndex]] = [this[randomIndex], this[currentIndex]];
  }

  return this;
}