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js-audio-demo-basic.html
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js-audio-demo-basic.html
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<!DOCTYPE html>
<html>
<head>
<title>Demo: Javascript with Audio</title>
</head>
<style>
body, html{
height: 100%;
font-family: Helvetica, 'sans-serif';
margin: 0;
}
#rateDiv, #volDiv, #timeDiv{
width: calc(100% / 3);
height: 100%;
float: left;
}
#rateDiv{
background-color: rgb(255, 0, 0);
}
#volDiv{
background-color: rgb(255, 255, 0);
}
#timeDiv{
background-color: rgb(0, 0, 255);
}
#player{
width: 100%;
height: 12.5%;
position: fixed;
right: 0;
bottom: 0;
background-color: lightyellow;
text-align: center;
}
#play, #pause, #stop{
display: inline-block;
}
#play-text, #pause-text, #stop-text{
line-height: 12.5vh;
font-size: 1.5em;
}
#play-text:hover, #pause-text:hover, #stop-text:hover{
font-style: italic;
font-weight: bold;
background-color: black;
color: white;
}
#play-text, #pause-text{
margin-right: 2em;
}
#pb-time{
width: 25px;
height: 25px;
background-color: black;
border-radius: 50%;
position: fixed;
bottom: calc(12.5% - 12.5px);
}
</style>
<body>
<audio onratechange="updateRate()" onvolumechange="updateVol()" ontimeupdate="updateTime()" id="bg" loop preload="auto">
<source src="audio/1.mp3" type="audio/mpeg">
</audio>
<div onclick="changeRate()" id="rateDiv"><h1 id="rateDisplay">Playback Rate:<br> <span id="rateVal">1</span></h1></div>
<div onclick="changeVol()" id="volDiv"><h1 id="volDisplay">Volume:<br> <span id="volVal">1</span></h1></div>
<div onclick="changeTime()" id="timeDiv"><h1 id="timeDisplay">Time:<br> <span id="timeVal">0</span></h1></div>
<div id="player">
<div id="pb-time"></div>
<div id="play" onclick="playAudio()"><span id="play-text">PLAY </span></div>
<div id="pause" onclick="pauseAudio()"><span id="pause-text">PAUSE </span></div>
<div id="stop" onclick="stopAudio()"><span id="stop-text">STOP </span></div>
</div>
</body>
<script type="text/javascript">
var bg = document.getElementById('bg');
function playAudio() {
bg.play();
}
function pauseAudio(){
bg.pause();
}
function stopAudio() {
bg.pause();
bg.currentTime = 0;
}
function changeRate(){
var rate = (event.clientY / window.innerHeight) * 4.75 + 0.25;
bg.playbackRate = rate;
}
function changeVol(){
var vol = event.clientY / window.innerHeight;
bg.volume = vol;
}
function changeTime(){
var time = (event.clientY / window.innerHeight) * bg.duration;
bg.currentTime = time;
}
function updateRate(){
document.getElementById('rateVal').innerHTML = bg.playbackRate;
var blueVal = parseInt(bg.playbackRate * 51);
document.getElementById('rateDiv').style.backgroundColor = "rgb(255, 0, " + blueVal + ")";
}
function updateVol(){
document.getElementById('volVal').innerHTML = bg.volume;
var redVal = parseInt(bg.volume * 255);
document.getElementById('volDiv').style.backgroundColor = "rgb(" + redVal + ", 255, 0)";
}
function updateTime(){
document.getElementById('timeVal').innerHTML = bg.currentTime;
var greenVal = parseInt(bg.currentTime / bg.duration * 255);
document.getElementById('timeDiv').style.backgroundColor = "rgb(0, " + greenVal + ", 255)";
var leftVal = (bg.currentTime / bg.duration) * window.innerWidth;
document.getElementById('pb-time').style.left = leftVal + "px";
}
</script>
</html>