微信H5页面 背景音乐 自动播放

function wxPlayMusic(id){
    if(window.WeiXinJSBridge){
        WeiXinJSBridge.invoke('getNetworkType', {}, function(e){
            playMusic(id);
        }, false);
    }else{
        document.addEventListener("WeiXinJSBridgeReady", function(){
            WeiXinJSBridge.invoke("getNetworkType", {}, function(e){
                playMusic(id);
            });
        }, false);
    }
}