Welcome Learner today in this blog post we will be Build a 2048 Sliding Block Puzzle Number Game in Browser With Javascript HTML5 and CSS3. All the Complete source code of the application is shown Down.
index.html
<div class="container">
<div class="heading">
<h1 class="title">2048</h1>
<div class="score-container">0</div>
</div>
<div class="game-container">
<div class="game-message">
<p></p>
<div class="lower">
<a class="retry-button">重玩</a>
</div>
</div>
<div class="grid-container">
<div class="grid-row">
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
</div>
<div class="grid-row">
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
</div>
<div class="grid-row">
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
</div>
<div class="grid-row">
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
<div class="grid-cell"></div>
</div>
</div>
<div class="tile-container">
</div>
</div>
<!-- <p class="game-explanation">
<strong class="important">提示:</strong> 按方向键或者触摸屏幕即可开玩
</p>
<hr>
<p>2014</p>
-->
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/hammer.js/1.0.6/hammer.min.js'></script>
style.css
html, body {
margin: 0;
padding: 0;
background: #faf8ef;
color: #776e65;
font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
font-size: 18px;
}
body {
margin: 20px 0;
}
.heading:after {
content: "";
display: block;
clear: both;
}
h1.title {
font-size: 80px;
font-weight: bold;
margin: 0;
display: block;
float: left;
}
@-webkit-keyframes move-up {
0% {
top: 25px;
opacity: 1;
}
100% {
top: -50px;
opacity: 0;
}
}
@-moz-keyframes move-up {
0% {
top: 25px;
opacity: 1;
}
100% {
top: -50px;
opacity: 0;
}
}
@keyframes move-up {
0% {
top: 25px;
opacity: 1;
}
100% {
top: -50px;
opacity: 0;
}
}
.score-container {
position: relative;
float: right;
background: #bbada0;
padding: 15px 25px;
font-size: 25px;
height: 25px;
line-height: 47px;
font-weight: bold;
border-radius: 3px;
color: white;
margin-top: 8px;
}
.score-container:after {
position: absolute;
width: 100%;
top: 10px;
left: 0;
content: "Score";
text-transform: uppercase;
font-size: 13px;
line-height: 13px;
text-align: center;
color: #eee4da;
}
.score-container .score-addition {
position: absolute;
right: 30px;
color: red;
font-size: 25px;
line-height: 25px;
font-weight: bold;
color: rgba(119, 110, 101, 0.9);
z-index: 100;
-webkit-animation: move-up 600ms ease-in;
-moz-animation: move-up 600ms ease-in;
-webkit-animation-fill-mode: both;
-moz-animation-fill-mode: both;
}
p {
margin-top: 0;
margin-bottom: 10px;
line-height: 1.65;
}
a {
color: #776e65;
font-weight: bold;
text-decoration: underline;
cursor: pointer;
}
strong.important {
text-transform: uppercase;
}
hr {
border: none;
border-bottom: 1px solid #d8d4d0;
margin-top: 20px;
margin-bottom: 30px;
}
.container {
width: 500px;
margin: 0 auto;
}
@-webkit-keyframes fade-in {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
@-moz-keyframes fade-in {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
@keyframes fade-in {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
.game-container {
margin-top: 10px;
position: relative;
padding: 15px;
cursor: default;
-webkit-touch-callout: none;
-webkit-user-select: none;
-moz-user-select: none;
background: #bbada0;
border-radius: 6px;
width: 500px;
height: 500px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.game-container .game-message {
display: none;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background: rgba(238, 228, 218, 0.5);
z-index: 100;
text-align: center;
-webkit-animation: fade-in 800ms ease 1200ms;
-moz-animation: fade-in 800ms ease 1200ms;
-webkit-animation-fill-mode: both;
-moz-animation-fill-mode: both;
}
.game-container .game-message p {
font-size: 60px;
font-weight: bold;
height: 60px;
line-height: 60px;
margin-top: 222px;
}
.game-container .game-message .lower {
display: block;
margin-top: 59px;
}
.game-container .game-message a {
display: inline-block;
background: #8f7a66;
border-radius: 3px;
padding: 0 20px;
text-decoration: none;
color: #f9f6f2;
height: 40px;
line-height: 42px;
margin-left: 9px;
}
.game-container .game-message.game-won {
background: rgba(237, 194, 46, 0.5);
color: #f9f6f2;
}
.game-container .game-message.game-won, .game-container .game-message.game-over {
display: block;
}
.grid-container {
position: absolute;
z-index: 1;
}
.grid-row {
margin-bottom: 15px;
}
.grid-row:last-child {
margin-bottom: 0;
}
.grid-row:after {
content: "";
display: block;
clear: both;
}
.grid-cell {
width: 106.25px;
height: 106.25px;
margin-right: 15px;
float: left;
border-radius: 3px;
background: rgba(238, 228, 218, 0.35);
}
.grid-cell:last-child {
margin-right: 0;
}
.tile-container {
position: absolute;
z-index: 2;
}
.tile {
width: 106.25px;
height: 106.25px;
line-height: 116.25px;
}
.tile.tile-position-1-1 {
position: absolute;
left: 0px;
top: 0px;
}
.tile.tile-position-1-2 {
position: absolute;
left: 0px;
top: 121px;
}
.tile.tile-position-1-3 {
position: absolute;
left: 0px;
top: 243px;
}
.tile.tile-position-1-4 {
position: absolute;
left: 0px;
top: 364px;
}
.tile.tile-position-2-1 {
position: absolute;
left: 121px;
top: 0px;
}
.tile.tile-position-2-2 {
position: absolute;
left: 121px;
top: 121px;
}
.tile.tile-position-2-3 {
position: absolute;
left: 121px;
top: 243px;
}
.tile.tile-position-2-4 {
position: absolute;
left: 121px;
top: 364px;
}
.tile.tile-position-3-1 {
position: absolute;
left: 243px;
top: 0px;
}
.tile.tile-position-3-2 {
position: absolute;
left: 243px;
top: 121px;
}
.tile.tile-position-3-3 {
position: absolute;
left: 243px;
top: 243px;
}
.tile.tile-position-3-4 {
position: absolute;
left: 243px;
top: 364px;
}
.tile.tile-position-4-1 {
position: absolute;
left: 364px;
top: 0px;
}
.tile.tile-position-4-2 {
position: absolute;
left: 364px;
top: 121px;
}
.tile.tile-position-4-3 {
position: absolute;
left: 364px;
top: 243px;
}
.tile.tile-position-4-4 {
position: absolute;
left: 364px;
top: 364px;
}
.tile {
border-radius: 3px;
background: #eee4da;
text-align: center;
font-weight: bold;
z-index: 10;
font-size: 55px;
-webkit-transition: 100ms ease-in-out;
-moz-transition: 100ms ease-in-out;
-webkit-transition-property: top, left;
-moz-transition-property: top, left;
}
.tile.tile-2 {
background: #eee4da;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-4 {
background: #ede0c8;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-8 {
color: #f9f6f2;
background: #f2b179;
}
.tile.tile-16 {
color: #f9f6f2;
background: #f59563;
}
.tile.tile-32 {
color: #f9f6f2;
background: #f67c5f;
}
.tile.tile-64 {
color: #f9f6f2;
background: #f65e3b;
}
.tile.tile-128 {
color: #f9f6f2;
background: #edcf72;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.2381), inset 0 0 0 1px rgba(255, 255, 255, 0.14286);
font-size: 45px;
}
@media screen and (max-width: 480px) {
.tile.tile-128 {
font-size: 25px;
}
}
.tile.tile-256 {
color: #f9f6f2;
background: #edcc61;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.31746), inset 0 0 0 1px rgba(255, 255, 255, 0.19048);
font-size: 45px;
}
@media screen and (max-width: 480px) {
.tile.tile-256 {
font-size: 25px;
}
}
.tile.tile-512 {
color: #f9f6f2;
background: #edc850;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.39683), inset 0 0 0 1px rgba(255, 255, 255, 0.2381);
font-size: 45px;
}
@media screen and (max-width: 480px) {
.tile.tile-512 {
font-size: 25px;
}
}
.tile.tile-1024 {
color: #f9f6f2;
background: #edc53f;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.47619), inset 0 0 0 1px rgba(255, 255, 255, 0.28571);
font-size: 35px;
}
@media screen and (max-width: 480px) {
.tile.tile-1024 {
font-size: 15px;
}
}
.tile.tile-2048 {
color: #f9f6f2;
background: #edc22e;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.55556), inset 0 0 0 1px rgba(255, 255, 255, 0.33333);
font-size: 35px;
}
@media screen and (max-width: 480px) {
.tile.tile-2048 {
font-size: 15px;
}
}
@-webkit-keyframes appear {
0% {
opacity: 0;
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
100% {
opacity: 1;
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
@-moz-keyframes appear {
0% {
opacity: 0;
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
100% {
opacity: 1;
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
@keyframes appear {
0% {
opacity: 0;
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
100% {
opacity: 1;
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
.tile-new {
-webkit-animation: appear 200ms ease 100ms;
-moz-animation: appear 200ms ease 100ms;
-webkit-animation-fill-mode: both;
-moz-animation-fill-mode: both;
}
@-webkit-keyframes pop {
0% {
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
50% {
-webkit-transform: scale(1.2);
-moz-transform: scale(1.2);
}
100% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
@-moz-keyframes pop {
0% {
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
50% {
-webkit-transform: scale(1.2);
-moz-transform: scale(1.2);
}
100% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
@keyframes pop {
0% {
-webkit-transform: scale(0);
-moz-transform: scale(0);
}
50% {
-webkit-transform: scale(1.2);
-moz-transform: scale(1.2);
}
100% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
}
}
.tile-merged {
z-index: 20;
-webkit-animation: pop 200ms ease 100ms;
-moz-animation: pop 200ms ease 100ms;
-webkit-animation-fill-mode: both;
-moz-animation-fill-mode: both;
}
.game-intro {
margin-bottom: 0;
}
.game-explanation {
margin-top: 50px;
}
@media screen and (max-width: 480px) {
html, body {
font-size: 15px;
}
body {
margin: 20px 0;
padding: 0 20px;
}
h1.title {
font-size: 50px;
}
.container {
width: 280px;
margin: 0 auto;
}
.score-container {
margin-top: 0;
}
.heading {
margin-bottom: 10px;
}
.game-container {
margin-top: 40px;
position: relative;
padding: 10px;
cursor: default;
-webkit-touch-callout: none;
-webkit-user-select: none;
-moz-user-select: none;
background: #bbada0;
border-radius: 6px;
width: 280px;
height: 280px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.game-container .game-message {
display: none;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background: rgba(238, 228, 218, 0.5);
z-index: 100;
text-align: center;
-webkit-animation: fade-in 800ms ease 1200ms;
-moz-animation: fade-in 800ms ease 1200ms;
-webkit-animation-fill-mode: both;
-moz-animation-fill-mode: both;
}
.game-container .game-message p {
font-size: 60px;
font-weight: bold;
height: 60px;
line-height: 60px;
margin-top: 222px;
}
.game-container .game-message .lower {
display: block;
margin-top: 59px;
}
.game-container .game-message a {
display: inline-block;
background: #8f7a66;
border-radius: 3px;
padding: 0 20px;
text-decoration: none;
color: #f9f6f2;
height: 40px;
line-height: 42px;
margin-left: 9px;
}
.game-container .game-message.game-won {
background: rgba(237, 194, 46, 0.5);
color: #f9f6f2;
}
.game-container .game-message.game-won, .game-container .game-message.game-over {
display: block;
}
.grid-container {
position: absolute;
z-index: 1;
}
.grid-row {
margin-bottom: 10px;
}
.grid-row:last-child {
margin-bottom: 0;
}
.grid-row:after {
content: "";
display: block;
clear: both;
}
.grid-cell {
width: 57.5px;
height: 57.5px;
margin-right: 10px;
float: left;
border-radius: 3px;
background: rgba(238, 228, 218, 0.35);
}
.grid-cell:last-child {
margin-right: 0;
}
.tile-container {
position: absolute;
z-index: 2;
}
.tile {
width: 57.5px;
height: 57.5px;
line-height: 67.5px;
}
.tile.tile-position-1-1 {
position: absolute;
left: 0px;
top: 0px;
}
.tile.tile-position-1-2 {
position: absolute;
left: 0px;
top: 68px;
}
.tile.tile-position-1-3 {
position: absolute;
left: 0px;
top: 135px;
}
.tile.tile-position-1-4 {
position: absolute;
left: 0px;
top: 203px;
}
.tile.tile-position-2-1 {
position: absolute;
left: 68px;
top: 0px;
}
.tile.tile-position-2-2 {
position: absolute;
left: 68px;
top: 68px;
}
.tile.tile-position-2-3 {
position: absolute;
left: 68px;
top: 135px;
}
.tile.tile-position-2-4 {
position: absolute;
left: 68px;
top: 203px;
}
.tile.tile-position-3-1 {
position: absolute;
left: 135px;
top: 0px;
}
.tile.tile-position-3-2 {
position: absolute;
left: 135px;
top: 68px;
}
.tile.tile-position-3-3 {
position: absolute;
left: 135px;
top: 135px;
}
.tile.tile-position-3-4 {
position: absolute;
left: 135px;
top: 203px;
}
.tile.tile-position-4-1 {
position: absolute;
left: 203px;
top: 0px;
}
.tile.tile-position-4-2 {
position: absolute;
left: 203px;
top: 68px;
}
.tile.tile-position-4-3 {
position: absolute;
left: 203px;
top: 135px;
}
.tile.tile-position-4-4 {
position: absolute;
left: 203px;
top: 203px;
}
.game-container {
margin-top: 20px;
}
.tile {
font-size: 35px;
}
.game-message p {
font-size: 30px !important;
height: 30px !important;
line-height: 30px !important;
margin-top: 90px !important;
}
.game-message .lower {
margin-top: 30px !important;
}
script.js
document.addEventListener("DOMContentLoaded", function () {
// Wait till the browser is ready to render the game (avoids glitches)
window.requestAnimationFrame(function () {
var manager = new GameManager(4, KeyboardInputManager, HTMLActuator);
});
});
function GameManager(size, InputManager, Actuator) {
this.size = size; // Size of the grid
this.inputManager = new InputManager;
this.actuator = new Actuator;
this.startTiles = 2;
this.inputManager.on("move", this.move.bind(this));
this.inputManager.on("restart", this.restart.bind(this));
this.setup();
}
// Restart the game
GameManager.prototype.restart = function () {
this.actuator.restart();
this.setup();
};
// Set up the game
GameManager.prototype.setup = function () {
this.grid = new Grid(this.size);
this.score = 0;
this.over = false;
this.won = false;
// Add the initial tiles
this.addStartTiles();
// Update the actuator
this.actuate();
};
// Set up the initial tiles to start the game with
GameManager.prototype.addStartTiles = function () {
for (var i = 0; i < this.startTiles; i++) {
this.addRandomTile();
}
};
// Adds a tile in a random position
GameManager.prototype.addRandomTile = function () {
if (this.grid.cellsAvailable()) {
var value = Math.random() < 0.9 ? 2 : 4;
var tile = new Tile(this.grid.randomAvailableCell(), value);
this.grid.insertTile(tile);
}
};
// Sends the updated grid to the actuator
GameManager.prototype.actuate = function () {
this.actuator.actuate(this.grid, {
score: this.score,
over: this.over,
won: this.won
});
};
// Save all tile positions and remove merger info
GameManager.prototype.prepareTiles = function () {
this.grid.eachCell(function (x, y, tile) {
if (tile) {
tile.mergedFrom = null;
tile.savePosition();
}
});
};
// Move a tile and its representation
GameManager.prototype.moveTile = function (tile, cell) {
this.grid.cells[tile.x][tile.y] = null;
this.grid.cells[cell.x][cell.y] = tile;
tile.updatePosition(cell);
};
// Move tiles on the grid in the specified direction
GameManager.prototype.move = function (direction) {
// 0: up, 1: right, 2:down, 3: left
var self = this;
if (this.over || this.won) return; // Don't do anything if the game's over
var cell, tile;
var vector = this.getVector(direction);
var traversals = this.buildTraversals(vector);
var moved = false;
// Save the current tile positions and remove merger information
this.prepareTiles();
// Traverse the grid in the right direction and move tiles
traversals.x.forEach(function (x) {
traversals.y.forEach(function (y) {
cell = { x: x, y: y };
tile = self.grid.cellContent(cell);
if (tile) {
var positions = self.findFarthestPosition(cell, vector);
var next = self.grid.cellContent(positions.next);
// Only one merger per row traversal?
if (next && next.value === tile.value && !next.mergedFrom) {
var merged = new Tile(positions.next, tile.value * 2);
merged.mergedFrom = [tile, next];
self.grid.insertTile(merged);
self.grid.removeTile(tile);
// Converge the two tiles' positions
tile.updatePosition(positions.next);
// Update the score
self.score += merged.value;
// The mighty 2048 tile
if (merged.value === 2048) self.won = true;
} else {
self.moveTile(tile, positions.farthest);
}
if (!self.positionsEqual(cell, tile)) {
moved = true; // The tile moved from its original cell!
}
}
});
});
if (moved) {
this.addRandomTile();
if (!this.movesAvailable()) {
this.over = true; // Game over!
}
this.actuate();
}
};
// Get the vector representing the chosen direction
GameManager.prototype.getVector = function (direction) {
// Vectors representing tile movement
var map = {
0: { x: 0, y: -1 }, // up
1: { x: 1, y: 0 }, // right
2: { x: 0, y: 1 }, // down
3: { x: -1, y: 0 } // left
};
return map[direction];
};
// Build a list of positions to traverse in the right order
GameManager.prototype.buildTraversals = function (vector) {
var traversals = { x: [], y: [] };
for (var pos = 0; pos < this.size; pos++) {
traversals.x.push(pos);
traversals.y.push(pos);
}
// Always traverse from the farthest cell in the chosen direction
if (vector.x === 1) traversals.x = traversals.x.reverse();
if (vector.y === 1) traversals.y = traversals.y.reverse();
return traversals;
};
GameManager.prototype.findFarthestPosition = function (cell, vector) {
var previous;
// Progress towards the vector direction until an obstacle is found
do {
previous = cell;
cell = { x: previous.x + vector.x, y: previous.y + vector.y };
} while (this.grid.withinBounds(cell) &&
this.grid.cellAvailable(cell));
return {
farthest: previous,
next: cell // Used to check if a merge is required
};
};
GameManager.prototype.movesAvailable = function () {
return this.grid.cellsAvailable() || this.tileMatchesAvailable();
};
// Check for available matches between tiles (more expensive check)
GameManager.prototype.tileMatchesAvailable = function () {
var self = this;
var tile;
for (var x = 0; x < this.size; x++) {
for (var y = 0; y < this.size; y++) {
tile = this.grid.cellContent({ x: x, y: y });
if (tile) {
for (var direction = 0; direction < 4; direction++) {
var vector = self.getVector(direction);
var cell = { x: x + vector.x, y: y + vector.y };
var other = self.grid.cellContent(cell);
if (other) {
}
if (other && other.value === tile.value) {
return true; // These two tiles can be merged
}
}
}
}
}
return false;
};
GameManager.prototype.positionsEqual = function (first, second) {
return first.x === second.x && first.y === second.y;
};
function Grid(size) {
this.size = size;
this.cells = [];
this.build();
}
// Build a grid of the specified size
Grid.prototype.build = function () {
for (var x = 0; x < this.size; x++) {
var row = this.cells[x] = [];
for (var y = 0; y < this.size; y++) {
row.push(null);
}
}
};
// Find the first available random position
Grid.prototype.randomAvailableCell = function () {
var cells = this.availableCells();
if (cells.length) {
return cells[Math.floor(Math.random() * cells.length)];
}
};
Grid.prototype.availableCells = function () {
var cells = [];
this.eachCell(function (x, y, tile) {
if (!tile) {
cells.push({ x: x, y: y });
}
});
return cells;
};
// Call callback for every cell
Grid.prototype.eachCell = function (callback) {
for (var x = 0; x < this.size; x++) {
for (var y = 0; y < this.size; y++) {
callback(x, y, this.cells[x][y]);
}
}
};
// Check if there are any cells available
Grid.prototype.cellsAvailable = function () {
return !!this.availableCells().length;
};
// Check if the specified cell is taken
Grid.prototype.cellAvailable = function (cell) {
return !this.cellOccupied(cell);
};
Grid.prototype.cellOccupied = function (cell) {
return !!this.cellContent(cell);
};
Grid.prototype.cellContent = function (cell) {
if (this.withinBounds(cell)) {
return this.cells[cell.x][cell.y];
} else {
return null;
}
};
// Inserts a tile at its position
Grid.prototype.insertTile = function (tile) {
this.cells[tile.x][tile.y] = tile;
};
Grid.prototype.removeTile = function (tile) {
this.cells[tile.x][tile.y] = null;
};
Grid.prototype.withinBounds = function (position) {
return position.x >= 0 && position.x < this.size &&
position.y >= 0 && position.y < this.size;
};
function HTMLActuator() {
this.tileContainer = document.getElementsByClassName("tile-container")[0];
this.scoreContainer = document.getElementsByClassName("score-container")[0];
this.messageContainer = document.getElementsByClassName("game-message")[0];
this.score = 0;
}
HTMLActuator.prototype.actuate = function (grid, metadata) {
var self = this;
window.requestAnimationFrame(function () {
self.clearContainer(self.tileContainer);
grid.cells.forEach(function (column) {
column.forEach(function (cell) {
if (cell) {
self.addTile(cell);
}
});
});
self.updateScore(metadata.score);
if (metadata.over) self.message(false); // You lose
if (metadata.won) self.message(true); // You win!
});
};
HTMLActuator.prototype.restart = function () {
this.clearMessage();
};
HTMLActuator.prototype.clearContainer = function (container) {
while (container.firstChild) {
container.removeChild(container.firstChild);
}
};
HTMLActuator.prototype.addTile = function (tile) {
var self = this;
var element = document.createElement("div");
var position = tile.previousPosition || { x: tile.x, y: tile.y };
positionClass = this.positionClass(position);
// We can't use classlist because it somehow glitches when replacing classes
var classes = ["tile", "tile-" + tile.value, positionClass];
this.applyClasses(element, classes);
element.textContent = tile.value;
if (tile.previousPosition) {
// Make sure that the tile gets rendered in the previous position first
window.requestAnimationFrame(function () {
classes[2] = self.positionClass({ x: tile.x, y: tile.y });
self.applyClasses(element, classes); // Update the position
});
} else if (tile.mergedFrom) {
classes.push("tile-merged");
this.applyClasses(element, classes);
// Render the tiles that merged
tile.mergedFrom.forEach(function (merged) {
self.addTile(merged);
});
} else {
classes.push("tile-new");
this.applyClasses(element, classes);
}
// Put the tile on the board
this.tileContainer.appendChild(element);
};
HTMLActuator.prototype.applyClasses = function (element, classes) {
element.setAttribute("class", classes.join(" "));
};
HTMLActuator.prototype.normalizePosition = function (position) {
return { x: position.x + 1, y: position.y + 1 };
};
HTMLActuator.prototype.positionClass = function (position) {
position = this.normalizePosition(position);
return "tile-position-" + position.x + "-" + position.y;
};
HTMLActuator.prototype.updateScore = function (score) {
this.clearContainer(this.scoreContainer);
var difference = score - this.score;
this.score = score;
this.scoreContainer.textContent = this.score;
if (difference > 0) {
var addition = document.createElement("div");
addition.classList.add("score-addition");
addition.textContent = "+" + difference;
this.scoreContainer.appendChild(addition);
}
};
HTMLActuator.prototype.message = function (won) {
var type = won ? "game-won" : "game-over";
var message = won ? "You win!" : "Game over!"
// if (ga) ga("send", "event", "game", "end", type, this.score);
this.messageContainer.classList.add(type);
this.messageContainer.getElementsByTagName("p")[0].textContent = message;
};
HTMLActuator.prototype.clearMessage = function () {
this.messageContainer.classList.remove("game-won", "game-over");
};
function KeyboardInputManager() {
this.events = {};
this.listen();
}
KeyboardInputManager.prototype.on = function (event, callback) {
if (!this.events[event]) {
this.events[event] = [];
}
this.events[event].push(callback);
};
KeyboardInputManager.prototype.emit = function (event, data) {
var callbacks = this.events[event];
if (callbacks) {
callbacks.forEach(function (callback) {
callback(data);
});
}
};
KeyboardInputManager.prototype.listen = function () {
var self = this;
var map = {
38: 0, // Up
39: 1, // Right
40: 2, // Down
37: 3, // Left
75: 0, // vim keybindings
76: 1,
74: 2,
72: 3
};
document.addEventListener("keydown", function (event) {
var modifiers = event.altKey || event.ctrlKey || event.metaKey ||
event.shiftKey;
var mapped = map[event.which];
if (!modifiers) {
if (mapped !== undefined) {
event.preventDefault();
self.emit("move", mapped);
}
if (event.which === 32) self.restart.bind(self)(event);
}
});
var retry = document.getElementsByClassName("retry-button")[0];
retry.addEventListener("click", this.restart.bind(this));
// Listen to swipe events
var gestures = [Hammer.DIRECTION_UP, Hammer.DIRECTION_RIGHT,
Hammer.DIRECTION_DOWN, Hammer.DIRECTION_LEFT];
var gameContainer = document.getElementsByClassName("game-container")[0];
var handler = Hammer(gameContainer, {
drag_block_horizontal: true,
drag_block_vertical: true
});
handler.on("swipe", function (event) {
event.gesture.preventDefault();
mapped = gestures.indexOf(event.gesture.direction);
if (mapped !== -1) self.emit("move", mapped);
});
};
KeyboardInputManager.prototype.restart = function (event) {
event.preventDefault();
this.emit("restart");
};
function Tile(position, value) {
this.x = position.x;
this.y = position.y;
this.value = value || 2;
this.previousPosition = null;
this.mergedFrom = null; // Tracks tiles that merged together
}
Tile.prototype.savePosition = function () {
this.previousPosition = { x: this.x, y: this.y };
};
Tile.prototype.updatePosition = function (position) {
this.x = position.x;
this.y = position.y;
};