JS 进度条效果实现代码整理

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我是靠谱客的博主贪玩面包，最近开发中收集的这篇文章主要介绍JS 进度条效果实现代码整理，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

第一种方法:
Loading.js

复制代码代码如下:

 
//频率 
var frequency = 50; 
//步长 
var step = 3; 
//背景颜色 
var loadingBgcolor = "#ffffff"; 
//宽度 
var loadingWidth = 354; 

/* 
*参数说明: 
*content：显示内容，可以为空； 
*imageURL：将引用JS文件的路径设置即可； 
*left：进度条显示位置left 
*top：进度条显示位置top 
*/ 
function Loading(content, imageURL, left, top) 
{ 
imageURL = imageURL + "Loading.jpg"; 

LoadTable(content, imageURL, left, top); 
showimage.style.display=""; 
window.setInterval("RefAct();", frequency); 
} 

function RefAct() 
{ 
imgAct.width += step; 
if(imgAct.width > loadingWidth-4) 
{ 
imgAct.width = 0; 
} 
} 

function LoadTable(content, imageURL, left, top) 
{ 
var strLoading; 
strLoading = ""; 
strLoading += "<div id="showimage" style="DISPLAY:none;Z-INDEX:100;LEFT:" + left+ "px;POSITION:absolute;TOP:" + top+ "px;" align="center">"; 
strLoading += "<TABLE id="Table1" cellSpacing="0" cellPadding="0" width="" + loadingWidth + "" border="0" bgcolor="" + loadingBgcolor+ "">"; 
if(content != "") 
{ 
strLoading += "<tr>"; 
strLoading += "<td align="center">"; 
strLoading += "<font size="4" face="Courier New, Courier, mono"><strong>" + content + "</strong></font>"; 
strLoading += "</td>"; 
strLoading += "</tr>"; 
strLoading += "<TR>"; 
} 
strLoading += "<TD class="Loading" height="8">"; 
strLoading += "<IMG id="imgAct" height="8" alt="" src="" + imageURL + "" width="0">"; 
strLoading += "</TD>"; 
strLoading += "</TR>"; 
strLoading += "</TABLE>"; 
strLoading += "</div>"; 

document.getElementById("loading_div").innerHTML = strLoading; 
} 

使用页:

复制代码代码如下:

 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
<head> 
<title>Untitled Document</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<script src="LoadingJS/Loading.js" type="text/javascript"></script> 

</head> 

<body> 
<input type="button" name="Button" value="Button" onclick="Loading('显示标签内容', 'LoadingJS/', 20, 100)"> 
<div id="loading_div" ></div> 
</body> 
</html> 

第二种方法：
JS实现进度显示功能

复制代码代码如下:

 
progress.js类文件： 

$ = function (id) { 
return document.getElementById(id); 
} 
//文本转JSON字符串 
String.prototype.toJson = function () { 
if (this == ) { 
return null; 
} 
else { 
try { 
return eval(( + this.replace(/rn/g, rn) + )); 
} 
catch (err) { 
} 
} 
}; 
//字符格式化方法 
String.prototype.format = function () { 
var newStr = this; 
var reg = null; 
for (var i = 0; i < arguments.length; i++) { 
reg = RegExp('{' + (i) + '}', 'gm'); 
newStr = newStr.replace(reg, arguments[i]); 
} 
return newStr; 
}; 
//进度条类 
function Progress(objId) { 
//window.setInterval对象 
this.interval = null; 
//进度条对象ID 
this.id = objId; 
//当前进度 起始进度为0 
this.progress = 0; 
//进度条显示进度的DIV ID 
this.progressId = inner + this.id; 
//进度条边框ID 
this.progressFrameId = frame + this.id; 
//进度条类参数配置 
this.config = { 
//宽度 
width: 150, 
//高度 
height: 20, 
//左边距 
left: 0, 
//顶部边距 
top: 0, 
//进度颜色 
progressColor: red, 
//边框颜色 
borderColor: #ccc, 
//边框宽度 
borderHeight: 2, 
//进度完成后间隔N秒后隐藏进度条 0为立即隐藏 
hiddenSplit:2000 
}; 
} 
//进度条类初始化方法 
Progress.prototype.init = function () { 
//新建进度条边框DIV 
var progressdiv = document.createElement(div); 
//边框DIV样式 
var progressdiv_css_text = position:absolute;width:{0}px;height:{1}px;left:{2}px;top:{3}px;border:{4} {5}px solid;.format 
( 
this.config.width, 
this.config.height, 
this.config.left, 
this.config.top, 
this.config.borderColor, 
this.config.borderHeight 
); 
//重置进度为0 
this.progress = 0; 
//设置边框ID 
progressdiv.id = this.progressFrameId; 
//设置边框样式 
progressdiv.style.cssText = progressdiv_css_text; 
//设置进度条HTML 
progressdiv.innerHTML = ' 

'.format(this.progressId, this.config.height, this.config.progressColor); 
//加入body中 
document.body.appendChild(progressdiv); 
}; 
//进度条隐藏函数 
Progress.prototype.hiddenProgress = function () { 
document.body.removeChild(document.getElementById(this.progressFrameId)); 
window.clearInterval(this.interval); 
} 
//进度结束时触发的函数 
Progress.prototype.complete = function () { 
window.clearInterval(this.interval); 
this.interval = window.setTimeout(this.id+.hiddenProgress();,this.config.hiddenSplit); 
if (this.completeCallBack) { 
this.completeCallBack(); 
} 
} 
//进度每次运行后的回调函数 
Progress.prototype.callback = function () { 
var progressDiv = document.getElementById(this.progressId); 
var progressFrameDiv = document.getElementById(this.progressFrameId); 
progressDiv.innerHTML = (this.progress*100)+ %; 
progressFrameDiv.title = 上传进度: + (this.progress*100) + %; 
progressDiv.style.width = (this.progress*100) + %; 
if (this.progress >= 1) { 
this.complete(); 
progressDiv.innerHTML = 文件上传成功!; 
} 
} 
//进度条运行函数。需要用户自己实现 
Progress.prototype.run = function () { 
alert(请实现 + this.id + .run方法以实现异步进度请求，回发回请调回调 + this.id + .callback方法。); 
window.clearInterval(this.interval); 
} 
//启动进度 
Progress.prototype.start = function () { 
this.init(); 
this.interval = window.setInterval(this.id + .run(), 1000); 
} 

图片加载进度实时显示

复制代码代码如下:

 
<script> 
var l=0; 
var imgs; 
var sum=0; 
var imgs=new Array(); 
function chk(){ 
l--; 
document.getElementById("aa").innerText=""+((sum-l)*100/sum)+"%" 
if (l==0){ 
for (var i=0;i<sum;i++) 
document.body.innerHTML+="<img src='"+imgs[i].src+"'>" 
} 
} 
if (document.images){ 
imgs[0]=new Image() 
imgs[1]=new Image() 
imgs[2]=new Image() 
imgs[3]=new Image() 
imgs[4]=new Image() 
imgs[5]=new Image() 
imgs[6]=new Image() 
imgs[7]=new Image() 
imgs[0].src="/articleimg/2006/08/3859/01.jpg"; 
imgs[1].src="/articleimg/2006/08/3859/02.jpg"; 
imgs[2].src="/articleimg/2006/08/3859/03.jpg"; 
imgs[3].src="/articleimg/2006/08/3859/04.jpg"; 
imgs[4].src="/articleimg/2006/08/3859/05.jpg"; 
imgs[5].src="/articleimg/2006/08/3859/06.jpg"; 
imgs[6].src="/articleimg/2006/08/3859/07.jpg"; 
imgs[7].src="/articleimg/2006/08/3859/08.jpg"; 
} 

</script> 
<body> 
<div id="aa">0%</div> 
<script> 
sum=l=imgs.length; 
for (var i=0;i<l;i++){ 
imgs[i].onload=chk; 
imgs[i].onerror=chk;//无论图片是否加载成功，都执行指定方法 
} 
</script> 
</body> 