+ audio.addEventListener('timeupdate', updateTime);
+ audio.addEventListener('durationchange', eventLogger);
+ audio.addEventListener('durationchange', updateDuration);
+ audio.addEventListener('ratechange', eventLogger);
+ audio.addEventListener('ratechange', updateRate);
+ }
+
+ function formatTime(time) {
+ var seconds = (time % 60).toFixed(0);
+ var minutes = (time / 60).toFixed(0);
+ return ("0" + minutes).substr(-2, 2) + ':' + ("0" + seconds).substr(-2, 2);
+ }
+
+ function updateTime() {
+ var time = document.getElementById('time');
+ var currentTime = audio.currentTime;
+ time.innerText = formatTime(currentTime);
+
+ var timeline = document.getElementById('timeline');
+ timeline.value = currentTime;
+ }
+
+ function updateDuration() {
+ var duration = document.getElementById('duration');
+ duration.innerText = formatTime(audio.duration);
+
+ var timeline = document.getElementById('timeline');
+ timeline.max = audio.duration;
+ }
+
+ function updateRate() {
+ var rate = document.getElementById('rate');
+ rate.value = audio.playbackRate;