[HTML]音乐自动播放（兼容微信）

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title></title>
    <style type="text/css">
    #play_btn {
        position: absolute;
        right: 6%;
        top: 6%;
        width: 24px;
        height: 24px;
        overflow: hidden;
        background-color: #000;
        border: solid 3px #ccc;
        border-radius: 50%;
        filter: alpha(opacity=50);
        -moz-opacity: 0.5;
        -khtml-opacity: 0.5;
        opacity: 0.5;
    }
    
    #play_btn button {
        display: inline-block;
        width: 24px;
        height: 24px;
        background-image: url(music.png);
        background-repeat: no-repeat;
        background-position: center;
        background-size: 45%;
        background-color: transparent;
        border: none;
    }
    
    #play_btn audio {
        width: 0px;
        height: 0px;
        overflow: hidden;
        visibility: hidden;
    }
    
    #play_btn.play {
        -webkit-animation: play 3s linear infinite;
        -moz-animation: play 3s linear infinite;
        -ms-animation: play 3s linear infinite;
        animation: play 3s linear infinite;
    }
    
    #play_btn.pause {
        -webkit-animation: none;
        -moz-animation: none;
        -ms-animation: none;
        animation: none;
    }
    
    @keyframes play {
        0% {
            -webkit-transform: rotate(0deg);
        }
        100% {
            -webkit-transform: rotate(360deg);
        }
    }
    
    @-moz-keyframes play {
        0% {
            -webkit-transform: rotate(0deg);
        }
        100% {
            -webkit-transform: rotate(360deg);
        }
    }
    
    @-webkit-keyframes play {
        0% {
            -webkit-transform: rotate(0deg);
        }
        100% {
            -webkit-transform: rotate(360deg);
        }
    }
    
    @-ms-keyframes play {
        0% {
            -webkit-transform: rotate(0deg);
        }
        100% {
            -webkit-transform: rotate(360deg);
        }
    }
    </style>
</head>

<body>
    <div id="play_btn">
        <button type="button"></button>
        <audio src="Hebe-A_little_happiness.aac" loop preload></audio>
    </div>
    <script>
    /*
              touchstart,DOMContentLoaded无法在jQuery.ready里执行监听操作
            */
    function autoPlay() {
        /* 自动播放音乐效果，解决浏览器或者APP自动播放问题 */
        function musicInBrowserHandler() {
            audioToggle(true);
            document.body.removeEventListener('touchstart', musicInBrowserHandler);
        }
        document.body.addEventListener('touchstart', musicInBrowserHandler);

        /* 自动播放音乐效果，解决微信自动播放问题 */
        function musicInWeixinHandler() {
            audioToggle(true);
            document.addEventListener('WeixinJSBridgeReady', function() {
                audioToggle(true);
            }, false);
            document.addEventListener('YixinJSBridgeReady', function() {
                audioToggle(true);
            }, false);
            document.removeEventListener('DOMContentLoaded', musicInWeixinHandler);
        }
        document.addEventListener('DOMContentLoaded', musicInWeixinHandler);
    }
    autoPlay();

    // ====================================================

    function audioToggle(isPlay) {
        var playBtn = document.getElementById('play_btn');
        var audio = playBtn.getElementsByTagName('audio')[0];

        if (typeof(isPlay) == 'undefined') {
            isPlay = !!audio.paused;
        }

        var space = String.fromCharCode(32); // 空格
        var playBtnClass = space + (playBtn.getAttribute('class') || (isPlay ? 'play' : 'pause')) + space;
        if (isPlay) {
            playBtnClass = playBtnClass.replace(space + 'pause' + space, space + 'play' + space);
            audio.play();
        } else {
            playBtnClass = playBtnClass.replace(space + 'play' + space, space + 'pause' + space);
            audio.pause();
        }
        playBtn.className = playBtnClass.replace(/(^s*)|(s*$)/g, '');
    }

    document.getElementById('play_btn').onclick = function() {
        audioToggle();
    }
    </script>
</body>

</html>