解决ios 和 android 网页音频音频自动播放

<div id="sound" data-soundmp3="./assets/sounds/ambient.mp3" data-soundogg="./assets/sounds/ambient.ogg"></div>

$(window).load(function() {
    var audio = new Audio();
    audio.loop = true;
    var soundmp3 = $('#sound').data('soundmp3');
    var soundogg = $('#sound').data('soundogg');
    if (audio.canPlayType("audio/mp3")) {
        var audio = new Audio(soundmp3);
    }else if(audio.canPlayType("audio/ogg")) {
        var audio = new Audio(soundogg);
    }
    audio.load();
    var sUserAgent = navigator.userAgent.toLowerCase();
    var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
    var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
    if (bIsIphoneOs || bIsIpad) {
        document.addEventListener("WeixinJSBridgeReady", function () { 
            audio.play();
        }, false);
        // 需引入 <script src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
        // 只在微信中有效
    } else {
        audio.play();
    }

    $("#sound").on('click', function() {
        if (audio.paused) {
            $("#sound .bar").removeClass("noAnim");
            audio.play(); 
            // audio.currentTime = 0.0; 
        } else {
            $("#sound .bar").addClass("noAnim");
            audio.pause();
        }
    });
});