javascript --关灯游戏

分析:

搭建10 * 10 的小方块

<script type="text/javascript" >

  var body = document.getElementsByTagName('body')[0]; //返回数组[0]

  var wrap = document.createElement('div');

  wrap.style.width = '500px';

  wrap.style.height = '500px';

  wrap.style.border = '1px solid gray';

  wrap.style.margin = '0 auto';

  wrap.style.position = 'relative';

  var arr = []; //用于存放每个div小方格

  for(var i = 0; i < 10; i++) {

    for( var j = 0; j < 10; j++) {

      var light = document.createElement('div');  //创建小方格

      light.style.width = '50px';

      light.style.height = '50px';

      light.style.background = 'black';

      light.style.border = '1px solid gray';

      light.style.position = 'absolute';

      light.style.left = i * 10 + '%';

      light.style.top = j * 10 + '%';

      light.index = arr.length;

      arr.push(light);//  将div 添加到数组中

      light.onclick = function() {    //添加点击事件

        var currentLight = event.target;    //获取当前的灯

        if(currentLight.style.background == 'black') {

          currentLight.style.background = 'blue';

        } else {

          currentLight.style.background = 'black';

        }

        if (currentLight.index >= 10) {

          var top = arr[currentLight.index - 10];

          top.style.background = (top.style.background == 'black') ? 'blue' : 'black';

        }

        if (currentLight.index + 10 < arr.length) {

          var bottom = arr[currentLight.index + 10];

          bottom.style.background = (bottom.style.background == 'black') ? 'blue' : 'black';

        }

        if(currentLight.index % 10 != 0 ){

          var left = arr[currentLight.index - 1];

          left.style.background = (left.style.background== 'black') ? 'blue' : 'black';

        }

        if(currentLight.index % 10 < 9) {

          var right = arr[currentLight.index + 1];

          right.style.background = (right.style.background == 'black') ? 'blue' : 'black';

        }

      }

      wrap.appendChild(light); 

    }  

  }

  body.appendChild(wrap); 

</script>

posted @ 2016-08-03 21:41  inno  阅读(193)  评论(0编辑  收藏  举报