设计视频播放器

HTML

<figure>
    <figcaption>视频播放器</figcaption>
    <div class="player">
        <video id="myVideo" src="video/trailer.mp4"></video>
        <div class="controls"> 
            <!-- 播放/暂停 --> 
            <a href="javascript:;" class="switch fa fa-play"></a> 
            <!-- 全屏 --> 
            <a href="javascript:;" class="expand fa fa-expand"></a> 
            <!-- 进度条 -->
            <div class="progress">
                <div class="loaded"></div>
                <div class="line"></div>
                <div class="bar"></div>
            </div>
            <!-- 时间 -->
            <div class="timer"> <span class="current">00:00:00</span> / <span class="total">00:00:00</span> </div>
            <!-- 声音 --> 
        </div>
    </div>
</figure>
    					

CSS

body {
	padding: 0;
	margin: 0;
	font-family: 'microsoft yahei', 'Helvetica', simhei, simsun, sans-serif;
	background-color: #F7F7F7;
}

a {
	text-decoration: none;
}

figcaption {
	font-size: 24px;
	text-align: center;
	margin: 20px;
}

.player {
	width: 720px;
	height: 360px;
	margin: 0 auto;
	background: #000 url(../images/loading.gif) center/300px no-repeat;
	position: relative;
}

video {
	display: none;
	height: 100%;
	margin: 0 auto;
}

.controls {
	width: 720px;
	height: 40px;
	background-color: #2196F3;
	position: absolute;
	left: 0;
	bottom: -40px;
	z-index: 99;
	opacity: 0.7;
}

.player:hover .controls {
	opacity: 1;
}

/*播放/暂停*/
.controls .switch {
	display: block;
	width: 20px;
	height: 20px;
	font-size: 20px;
	color: #FFF;
	position: absolute;
	top: 11px;
	left: 11px;
}
.controls .switch:hover {
	color: blue;
}

/*全屏按钮*/
.controls .expand {
	display: block;
	width: 20px;
	height: 20px;
	font-size: 20px;
	color: #FFF;
	position: absolute;
	right: 11px;
	top: 11px;
}
.controls .expand:hover {
	color: blue;
}

/*进度条*/
.progress {
	width: 430px;
	height: 10px;
	border-radius: 3px;
	overflow: hidden;
	background-color: #555;
	cursor: pointer;
	position: absolute;
	top: 16px;
	left: 45px;
}

/*下载进度*/
.progress .loaded {
	width: 0;
	height: 100%;
	background-color: blue;
}

/*播放进度*/
.progress .line {
	width: 0;
	height: 100%;
	background-color: #FFF;
	position: absolute;
	top: 0;
	left: 0;
}

/**/
.progress .bar {
	width: 100%;
	height: 100%;
	opacity: 0;
	position: absolute;
	left: 0;
	top: 0;
	z-index: 1;
}

/*时间*/
.timer {
	height: 20px;
	line-height: 20px;
	position: absolute;
	left: 490px;
	top: 11px;
	color: #FFF;
	font-size: 14px;
}
    					

JS

var video = document.querySelector("video");
var isPlay = document.querySelector(".switch");
var expand = document.querySelector(".expand");
var progress = document.querySelector(".progress");
var loaded = document.querySelector(".progress > .loaded");
var currPlayTime = document.querySelector(".timer > .current");
var totalTime = document.querySelector(".timer > .total");

//当视频可播放的时候
video.oncanplay = function(){
	//显示视频
	this.style.display = "block";
	//显示视频总时长
	totalTime.innerHTML = getFormatTime(this.duration);
};

//播放按钮控制
isPlay.onclick = function(){
	if(video.paused) {
		video.play();
	} else {
		video.pause();
	}
	this.classList.toggle("fa-pause");
};

//全屏
expand.onclick = function(){
	video.webkitRequestFullScreen();
};

//播放进度
video.ontimeupdate = function(){
	var currTime = this.currentTime,    //当前播放时间
		duration = this.duration;       // 视频总时长
	//百分比
	var pre = currTime / duration * 100 + "%";
	//显示进度条
	loaded.style.width = pre;

	//显示当前播放进度时间
	currPlayTime.innerHTML = getFormatTime(currTime);
};

//跳跃播放
progress.onclick = function(e){
	var event = e || window.event;
	video.currentTime = (event.offsetX / this.offsetWidth) * video.duration;
};
//全屏
expand.onclick = function(){ video.webkitRequestFullScreen(); };

//播放完毕还原设置
video.onended = function(){
	var that = this;
	//切换播放按钮状态
	isPlay.classList.remove("fa-pause");
	isPlay.classList.add("fa-play");
	//进度条为0
	loaded.style.width = 0;
	//还原当前播放时间
	currPlayTime.innerHTML = getFormatTime();
	//视频恢复到播放开始状态
	that.currentTime = 0;
};

function getFormatTime(time) {
	var time = time || 0;

	var h = parseInt(time/3600),
		m = parseInt(time%3600/60),
		s = parseInt(time%60);
	h = h < 10 ? "0"+h : h;
	m = m < 10 ? "0"+m : m;
	s = s < 10 ? "0"+s : s;

	return h+":"+m+":"+s;
}