HTML5实现video标签的⾃定义播放进度条现在随着html5的渐热，越来越多的web开发者都开始选择使⽤html5写出⼀些⽐较好的web应⽤。
html代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>HTML5-Video-Player</title>
<style type="text/css">
.videoPlayer{
border: 1px solid #000;
width: 600px;
}
#video{
margin-top: 0px;
}
#videoControls{
width: 600px;
margin-top: 0px;
}
.show{
opacity: 1;
}
.
hide{
opacity: 0;
}
#progressWrap{
background-color: black;
height: 25px;
cursor: pointer;
}
#playProgress{
background-color: red;
width: 0px;
height: 25px;
border-right: 2px solid blue;
}
#showProgress{
background-color: ;
font-weight: 600;
font-size: 20px;
line-height: 25px;
}
</style>
</head>
<body>
<div class="">
<h1>HTML5_Video_Player</h1>
<div class="videoPlayer" id="videoContainer">
<video id="video"
width="600" height="360"
preload controls
>
<source src="nettuts.s3.amazonaws/763_sammyJSIntro/trailer_test.mp4" type='video/mp4'>
<source src="nettuts.s3.amazonaws/763_sammyJSIntro/" type='video/ogg'>
</video>
<div id="videoControls">
<div id="progressWrap">
<div id="playProgress">
<span id="showProgress">0</span>
</div>
</div>
<div>
<button id="playBtn" title="Play">播放</button>
<button id="fullScreenBtn" title="FullScreen Toggle">全屏</button>
</div>
</div>
</div>
</div>
</body>
</html>
js代码：
// 为了不随意的创建全局变量，我们将我们的代码放在⼀个⾃⼰调⽤⾃⼰的匿名函数中，这是⼀个好的编程习惯
(function(window, document){
// 获取要操作的元素
var video = ElementById("video");
var videoControls = ElementById("videoControls");
javascript进度条var videoContainer = ElementById("videoContainer");
var controls = ElementById("video_controls");
var playBtn = ElementById("playBtn");
var fullScreenBtn = ElementById("fullScreenBtn");
var progressWrap = ElementById("progressWrap");
var playProgress = ElementById("playProgress");
var fullScreenFlag = false;
var progressFlag;
// 创建我们的操作对象，我们的所有操作都在这个对象上。
var videoPlayer = {
init: function(){
var that = this;
bindEvent(video, "loadeddata", videoPlayer.initControls);
videoPlayer.operateControls();
},
initControls: function(){
videoPlayer.showHideControls();
},
showHideControls: function(){
bindEvent(video, "mouseover", showControls);
bindEvent(videoControls, "mouseover", showControls);
bindEvent(video, "mouseout", hideControls);
bindEvent(videoControls, "mouseout", hideControls);
},
operateControls: function(){
bindEvent(playBtn, "click", play);
bindEvent(video, "click", play);
bindEvent(fullScreenBtn, "click", fullScreen);
bindEvent(progressWrap, "mousedown", videoSeek);
}
}
videoPlayer.init();
/
/ 原⽣的JavaScript事件绑定函数
function bindEvent(ele, eventName, func){
if(window.addEventListener){
ele.addEventListener(eventName, func);
}
else{
ele.attachEvent('on' + eventName, func);
}
}
// 显⽰video的控制⾯板
function showControls(){
videoControls.style.opacity = 1;
}
// 隐藏video的控制⾯板
function hideControls(){
// 为了让控制⾯板⼀直出现，我把videoControls.style.opacity的值改为1
videoControls.style.opacity = 1;
}
// 控制video的播放
function play(){
if ( video.paused || ded ){
if ( ded ){
video.currentTime = 0;
}
video.play();
playBtn.innerHTML = "暂停";
progressFlag = setInterval(getProgress, 60);
}
else{
video.pause();
playBtn.innerHTML = "播放";
clearInterval(progressFlag);
}
}
// 控制video是否全屏，额这⼀部分没有实现好，以后有空我会接着研究⼀下
function fullScreen(){
if(fullScreenFlag){
videoContainer.webkitCancelFullScreen();
}
else{
videoContainer.webkitRequestFullscreen();
}
}
// video的播放条
function getProgress(){
var percent = video.currentTime / video.duration;
playProgress.style.width = percent * (progressWrap.offsetWidth) - 2 + "px";                showProgress.innerHTML = (percent * 100).toFixed(1) + "%";
}
// ⿏标在播放条上点击时进⾏捕获并进⾏处理
function videoSeek(e){
if(video.paused || ded){
play();
enhanceVideoSeek(e);
}
else{
enhanceVideoSeek(e);
}
}
function enhanceVideoSeek(e){
clearInterval(progressFlag);
var length = e.pageX - progressWrap.offsetLeft;
var percent = length / progressWrap.offsetWidth;
playProgress.style.width = percent * (progressWrap.offsetWidth) - 2 + "px";                video.currentTime = percent * video.duration;
progressFlag = setInterval(getProgress, 60);
}
}(this, document))

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