獲取Audio音頻的總時長

let musicDom = document.getElementsByTagName('audio')[0];  // 獲取AudioDom節點
            musicDom.load();//因為source標簽不能直接更改路徑，所以整個audio標簽必須重新加載一次
            musicDom.oncanplay = function () {  
                console.log("音樂時長",musicDom.duration);//音樂總時長
                //處理時長
                var time = musicDom.duration;
                //分鍾
                var minute = time / 60;
                var minutes = parseInt(minute);
                if (minutes < 10) {
                    minutes = "0" + minutes;
                }
                //秒
                var second = time % 60;
                var seconds = Math.round(second);
                if (seconds < 10) {
                    seconds = "0" + seconds;
                }
                console.log('處理音樂時長',minutes+"："+seconds)

                    
            }