javascript制作2048游戏

时间：2021-05-26

2048.html

<!DOCTYPE><html xmlns="http:///jquery-latest.js"></script> --><script type="text/javascript" src="js/2048.js"></script></head> <body> <div id="div2048"> <a id="start">tap to start :-)</a> </div></body></html>

2048.css

@charset "utf-8"; #div2048{ width: 500px; height: 500px; background-color: #b8af9e; margin: 0 auto; position: relative;}#start{ width: 500px; height: 500px; line-height: 500px; display: block; text-align: center; font-size: 30px; background: #f2b179; color: #FFFFFF;}#div2048 div.tile{ margin: 20px 0px 0px 20px; width: 100px; height: 40px; padding: 30px 0; font-size: 40px; line-height: 40px; text-align: center; float: left;}#div2048 div.tile0{ background: #ccc0b2;}#div2048 div.tile2{ color: #7c736a; background: #eee4da;}#div2048 div.tile4{ color: #7c736a; background: #ece0c8;}#div2048 div.tile8{ color: #fff7eb; background: #f2b179;}#div2048 div.tile16{ color:#fff7eb; background:#f59563;}#div2048 div.tile32{ color:#fff7eb; background:#f57c5f;}#div2048 div.tile64{ color:#fff7eb; background:#f65d3b;}#div2048 div.tile128{ color:#fff7eb; background:#edce71;}#div2048 div.tile256{ color:#fff7eb; background:#edcc61;}#div2048 div.tile512{ color:#fff7eb; background:#ecc850;}#div2048 div.tile1024{ color:#fff7eb; background:#edc53f;}#div2048 div.tile2048{ color:#fff7eb; background:#eec22e;}

2048.js

function game2048(container){ this.container = container; this.tiles = new Array(16);} game2048.prototype = { init: function(){ for(var i = 0, len = this.tiles.length; i < len; i++){ var tile = this.newTile(0); tile.setAttribute('index', i); this.container.appendChild(tile); this.tiles[i] = tile; } this.randomTile(); this.randomTile(); }, newTile: function(val){ var tile = document.createElement('div'); this.setTileVal(tile, val) return tile; }, setTileVal: function(tile, val){ tile.className = 'tile tile' + val; tile.setAttribute('val', val); tile.innerHTML = val > 0 ? val : ''; }, randomTile: function(){ var zeroTiles = []; for(var i = 0, len = this.tiles.length; i < len; i++){ if(this.tiles[i].getAttribute('val') == 0){ zeroTiles.push(this.tiles[i]); } } var rTile = zeroTiles[Math.floor(Math.random() * zeroTiles.length)]; this.setTileVal(rTile, Math.random() < 0.8 ? 2 : 4); }, move:function(direction){ var j; switch(direction){ case 'W': for(var i = 4, len = this.tiles.length; i < len; i++){ j = i; while(j >= 4){ this.merge(this.tiles[j - 4], this.tiles[j]); j -= 4; } } break; case 'S': for(var i = 11; i >= 0; i--){ j = i; while(j <= 11){ this.merge(this.tiles[j + 4], this.tiles[j]); j += 4; } } break; case 'A': for(var i = 1, len = this.tiles.length; i < len; i++){ j = i; while(j % 4 != 0){ this.merge(this.tiles[j - 1], this.tiles[j]); j -= 1; } } break; case 'D': for(var i = 14; i >= 0; i--){ j = i; while(j % 4 != 3){ this.merge(this.tiles[j + 1], this.tiles[j]); j += 1; } } break; } this.randomTile(); }, merge: function(prevTile, currTile){ var prevVal = prevTile.getAttribute('val'); var currVal = currTile.getAttribute('val'); if(currVal != 0){ if(prevVal == 0){ this.setTileVal(prevTile, currVal); this.setTileVal(currTile, 0); } else if(prevVal == currVal){ this.setTileVal(prevTile, prevVal * 2); this.setTileVal(currTile, 0); } } }, equal: function(tile1, tile2){ return tile1.getAttribute('val') == tile2.getAttribute('val'); }, max: function(){ for(var i = 0, len = this.tiles.length; i < len; i++){ if(this.tiles[i].getAttribute('val') == 2048){ return true; } } }, over: function(){ for(var i = 0, len = this.tiles.length; i < len; i++){ if(this.tiles[i].getAttribute('val') == 0){ return false; } if(i % 4 != 3){ if(this.equal(this.tiles[i], this.tiles[i + 1])){ return false; } } if(i < 12){ if(this.equal(this.tiles[i], this.tiles[i + 4])){ return false; } } } return true; }, clean: function(){ for(var i = 0, len = this.tiles.length; i < len; i++){ this.container.removeChild(this.tiles[i]); } this.tiles = new Array(16); }} var game, startBtn; window.onload = function(){ var container = document.getElementById('div2048'); startBtn = document.getElementById('start'); startBtn.onclick = function(){ this.style.display = 'none'; game = game || new game2048(container); game.init(); }} window.onkeydown = function(e){ var keynum, keychar; if(window.event){ // IE keynum = e.keyCode; } else if(e.which){ // Netscape/Firefox/Opera keynum = e.which; } keychar = String.fromCharCode(keynum); if(['W', 'S', 'A', 'D'].indexOf(keychar) > -1){ if(game.over()){ game.clean(); startBtn.style.display = 'block'; startBtn.innerHTML = 'game over, replay?'; return; } game.move(keychar); }}

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