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云代码 - javascript代码库

单物体运动框架

2018-01-06 作者: 柯侧耳倾听者举报

[javascript]代码库

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>单物体运动框架</title>
        <style type="text/css">
            #div1{
                width: 100px;
                height: 100px;
                background: red;
                position: absolute;
                left:800px;
                top: 50px;
            }
            #div2{
                width: 1px;
                height: 300px;
                background: black;
                position: absolute;
                left: 200px;
                top: 0;
            }
            #div3{
                width: 1px;
                height: 300px;
                background: black;
                position: absolute;
                left: 500px;
                top: 0;
            }
        </style>
         
    </head>
    <body>
        <input type="button" value="到200" onclick="startMove(200)" />
        <input type="button" value="到500" onclick="startMove(500)" />
        <div id="div1"></div>
        <div id="div2"></div>
        <div id="div3"></div>
        <script type="text/javascript">
            var timer=null;
            function startMove(iTarget){
                var oDiv=document.getElementById('div1');
                clearInterval(timer);
              timer=setInterval(function(){
                        var speed=0;
                if(iTarget>oDiv.offsetLeft){
                    speed=7;
                }else{
                    speed=-7;
                }
                if(Math.abs(iTarget-oDiv.offsetLeft)<=7){
                    clearInterval(timer);
                    oDiv.style.left=iTarget+'px';
                }else{
                oDiv.style.left=oDiv.offsetLeft+speed+'px';
                }
                },30);
            }
        </script>
    </body>
</html>


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