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js实现4个方向滚动的球

marie0119 人气:0

效果图:

代码如下:

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 <style>
 *{
 margin: 0;
 padding: 0;
 }
 #wrap{
 width: 800px;
 height: 500px;
 border: 1px solid deeppink;
 margin-left: 10px;
 margin-top: 5px;
 float: left;
 }
 #input1{
 width: 80px;
 margin: 5px auto 5px 10px;
 font-size: 0;
 float: left;
 }
 #div1{
 width: 100px;
 height: 100px;
 background: hotpink;
 position: absolute;
 top: 20px;
 left: 30px;
 border-radius: 100px;
 box-shadow: 0px 5px 5px rgba(0,0,0,.5);
 }
 input{
 width: 100px;
 height: 40px;
 line-height: 40px;
 text-align: center;
 font-size: 18px;
 display: block;
 background: palegreen;
 margin-bottom: 5px;
 }
 </style>
 </head>
 <body>
 <div id="wrap">
 <div id="div1"></div>
 </div>
 <div id="input1">
 <input type="button" value="向左" id="btn2" />
 <input type="button" value="向右" id="btn1"/>
 <input type="button" value="向上" id="btn3" />
 <input type="button" value="向下" id="btn4"/>
 </div>
 <script>
 var oBtn=document.getElementById('btn1');
 var oDiv=document.getElementById('div1');
 var oBtn2=document.getElementById('btn2');
 var oBtn3=document.getElementById('btn3');
 var oBtn4=document.getElementById('btn4');
 oBtn4.onclick=function(){
 move(oDiv,10,380,'0px 5px 5px rgba(0,0,0,.5)','top');
 }
 oBtn3.onclick=function(){
 move(oDiv,-10,30,'0px -5px 5px rgba(0,0,0,.5)','top');
 }
 oBtn2.onclick=function(){
 move(oDiv,-10,40,'-5px 5px 5px rgba(0,0,0,.5)','left');
 }
 oBtn.onclick=function(){
 move(oDiv,10,680,'5px 5px 5px rgba(0,0,0,.5)','left');
 }
 function move(obj,val,target,bs,dir){
 obj.style.boxShadow=bs;
 clearInterval(obj.timer);
 obj.timer=setInterval(function(){
  var speed=parseInt(getStyle(obj,dir))+val;
  if(speed>=target&&val>0){
  speed=target;
  } 
  if(speed<=target&&val<0){
  speed=target
  }
  obj.style[dir]=speed+'px';
  if(speed==target){
  clearInterval(obj.timer);
  }
 },30);
 }
 function getStyle(obj,sty){
 return obj.currentStyle?obj.currentStyle[sty]:getComputedStyle(obj)[sty];
 }
 </script>
 </body>
</html>

以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,同时也希望多多支持!

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