Nodejs Utililty Methods Array Bubble Sort

Array.prototype.bubblesort = function() {
    var done = false;
    while (!done) {
        done = true;
        for (var i = 1; i<this.length; i++) {
            if (this[i-1] > this[i]) {
                done = false;
                [this[i-1], this[i]] = [this[i], this[i-1]]
    return this;

Array.prototype.bubblesort = function () {
    'use strict';
    var swap,
        i,
        lastIndex = this.length - 1;
    do {
        swap = false;
        for (i = 0; i < lastIndex; i++) {
            if (this[i] > this[i + 1]) {
...

Array.prototype.BubbleSort = function(){
    for(var i = 0; i < this.length - 1; i++){
        for(var j = i + 1; j < this.length; j++){
            if (this[i] > this[j]){
                var temp = this[i];
                this[i] = this[j];
                this[j] = temp;
    return this;
console.log([6,4,0, 3,-2,1].BubbleSort());

function myBubbleSort(arr) {
  var length = arr.length;
  for (var i = 0; i < length; i++) {
    for (var j = 0; j < (length - i - 1); j++) {
      if(arr[j] > arr[j+1]) {
        var tmp = arr[j];
        arr[j] = arr[j+1];
        arr[j+1] = tmp;
  return arr;
Array.prototype.myBubbleSort = function () {
  var length = this.length;
  for (var i = 0; i < length; i++) {
    for (var j = 0; j < (length - i - 1); j++) {
      if(this[j] > this[j+1]) {
        var tmp = this[j];
        this[j] = this[j+1];
        this[j+1] = tmp;
  return this;
};