html5结合javascript实现简易音乐播放器

我们先来看下最终的实现效果：

1、HTML代码

<div id="music">
	<div id="container">
		<h3 id="musicName">一月，银装轻舞-紫竹笛韵</h3>
		<img src="https://www.swvq.com/image/一月，银装轻舞-紫竹笛韵.jpg" id="musicImg">
		<audio src="https://www.swvq.com/music/一月，银装轻舞-紫竹笛韵.mp3" controls id="audio"></audio>
		<div class="btn">
			<button id="play">play</button>
			<button id="pause">pause</button>
			<button id="prev">prev</button>
			<button id="next">next</button>
		</div>
	</div>
</div>

2、播放暂停切换效果实现

// 播放
play.onclick = function(){
	if(audio.paused){
		audio.play();
	}
}
 
// 暂停
pause.onclick = function(){
	if(audio.played){
		audio.pause();
	}
}

自动切换下一首

audio.addEventListener('ended',function(){
	next.onclick();
},false);

3、歌曲切换时歌曲图片与当前背景也随着改变

// 上一首
prev.onclick = function(){
	num = (num   len - 1) % len;
	audio.src = 'https://www.swvq.com/music/'   music[num]   '.mp3';
	musicName.innerHTML = music[num];
	bgImage.style.backgroundImage = 'url(./image/'   music[num]   '.jpg)';
	musicImg.src = 'https://www.swvq.com/image/'   music[num]   '.jpg';
	audio.play();
}
 
// 下一首
next.onclick = function(){
	num = (num   1) % len;
	audio.src = 'https://www.swvq.com/music/'   music[num]   '.mp3';
	musicName.innerHTML = music[num];
	bgImage.style.backgroundImage = 'url(./image/'   music[num]   '.jpg)';
	musicImg.src = 'https://www.swvq.com/image/'   music[num]   '.jpg';
	audio.play();
}

4、实现背景图片透明，内容不透明效果

#music {
	width: 500px;
	height: 500px;
	border-radius: 10px;
	margin: 20px auto;
	position: relative;
	background: url(./image/一月，银装轻舞-紫竹笛韵.jpg) no-repeat;
	background-size: cover;
	text-align: center;
}
#container {
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	width: 500px;
	height: 500px;
	text-align: center;
	background:rgba(255,255,255,0.6);
}

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