标签:tle pad etl ntb script 定时器 highlight 区别 on()
<!DOCTYPE html> <head> <title>js速度动画</title> <meta charset="utf-8"> <style> *{ margin:0px; padding:0px; } #div1{ width:200px; height:200px; background-color:red; position:relative; left:-200px; } #div1 span{ width:20px; height:50px; position:absolute; left:200px; top:75px; background-color:blue; } </style> <script> window.onload = function(){ var oDiv = document.getElementById(‘div1‘); oDiv.onmouseover = function(){ startMove(); } } var timer = null; function startMove(){ clearInterval(timer); var oDiv = document.getElementById(‘div1‘); timer = setInterval(function(){ if(oDiv.offsetLeft == 0){ clearInterval(timer); }else{ oDiv.style.left = oDiv.offsetLeft+1+‘px‘; } },30) } </script> </head> <body> <div id="div1"> <span id="share">分享</span> </div> </body> </html>
有else的时候,进入哪个语句的判断会同时进行,因此方块会在left为0时停下。而当无else的时候,即使left为0取消了定时器,下面位置改变依然会执行而且随着offsetLeft越来越大,速度会越来越快
标签:tle pad etl ntb script 定时器 highlight 区别 on()
原文地址:http://www.cnblogs.com/yuehenying/p/6640950.html