http://www.jb51.net/article/61113.htm(轉載出處) 本文實例講述了js實現進度條的方法。分享給大家供大家參考。具體實現方法如下: 1.setTimeout和clearTimeout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ...
http://www.jb51.net/article/61113.htm(轉載出處)
本文實例講述了js實現進度條的方法。分享給大家供大家參考。具體實現方法如下:
1.setTimeout和clearTimeout
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<html>
<head>
<title>進度條</title>
<style type= "text/css" >
.container{
width:450px;
border:1px solid #6C9C2C;
height:25px;
}
#bar{
background: #95CA0D;
float:left;
height:100%;
text-align:center;
line-height:150%;
}
</style>
<script type= "text/javascript" >
function run(){
var bar = document.getElementById( "bar" );
var total = document.getElementById( "total" );
bar.style.width=parseInt(bar.style.width) + 1 + "%" ;
total.innerHTML = bar.style.width;
if (bar.style.width == "100%" ){
window.clearTimeout(timeout);
return ;
}
var timeout=window.setTimeout( "run()" ,100);
}
window.onload = function (){
run();
}
</script>
</head>
<body>
<div class= "container" >
<div id= "bar" style= "width:0%;" ></div>
</div>
<span id= "total" ></span>
</body>
</html>
|
效果圖:
2.setInterval和clearInterval
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<html>
<head>
<title>進度條</title>
<style type= "text/css" >
.processcontainer{
width:450px;
border:1px solid #6C9C2C;
height:25px;
}
#processbar{
background: #95CA0D;
float:left;
height:100%;
text-align:center;
line-height:150%;
}
</style>
<script type= "text/javascript" >
function setProcess(){
var processbar = document.getElementById( "processbar" );
processbar.style.width = parseInt(processbar.style.width) + 1 + "%" ;
processbar.innerHTML = processbar.style.width;
if (processbar.style.width == "100%" ){
window.clearInterval(bartimer);
}
}
var bartimer = window.setInterval( function (){setProcess();},100);
window.onload = function (){
bartimer;
}
</script>
</head>
<body>
<div class= "processcontainer" >
<div id= "processbar" style= "width:0%;" ></div>
</div>
</body>
</html>
|
效果圖:
3.setTimeout和setInterval區別
setTimeout() 只執行 code 一次。如果要多次調用,請使用 setInterval() ,setInterval() 方法會不停地調用函數,直到 clearInterval() 被調用或視窗被關閉,或者讓 code 自身再次調用 setTimeout()。
希望本文所述對大家的javascript程式設計有所幫助。