鼠标点击跟随，鼠标点击哪里，图片跟随到哪里； 

 1 <!DOCTYPE html>
 2 <html>
 3 <head lang="en">
 4     <meta charset="UTF-8">
 5     <title></title>
 6     <style>
 7         #image {
 8             width: 99px;
 9             position: absolute;
10             top:0;
11             left: 0;
12         }
13     </style>
14 </head>
15 <body>
16 <img src="img.jpg" alt="" id="image"/>
17 </body>
18 </html>
19 <script>
20     // 1.第一步获取元素；
21     // 2.建立缓动东环定时器
22     // 3.建立事件，获得target值
23     var image = document.getElementById("image");
24     //注意这里的点击对象是document不是img
25     document.onclick = function(event) {
26         var event = event || window.event;
27         targetX = event.clientX - image.offsetWidth /2;
28         targetY = event.clientY - image.offsetHeight /2;
29     }
30     // 缓动
31     var     leaderX = 0,
32         leaderY= 0,
33         targetX = 0,
34         targetY = 0;
35     setInterval(function() {
36         leaderX = leaderX + (targetX - leaderX) / 10;
37         leaderY = leaderY + (targetY - leaderY) / 10;
38         image.style.left = leaderX + "px";
39         image.style.top = leaderY + "px";
40     },10)
41 </script>

原理：将鼠标点击事件获得的clientX,clientY的值赋值给图片的style.left/style.top;

posted @ 2017-12-29 10:17  前端极客  阅读(548)  评论(0)  编辑  收藏  举报