音频动效
纯前端样式，无音频分析。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.wrap{
display: flex;
justify-content: center;
align-items: center;
}
.rec{
height: 100px;
width: 3px;
background-color: cadetblue;
margin-left: 3px;
transition: all 1s;
}
</style>
</head>
<body>
<div class="wrap">
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
<div class="rec"></div>
</div>
</body>
<script>
var recs=document.getElementsByClassName('rec');
var transform=function(){
for(let i=0;i<recs.length;i++){
recs[i].style.height=Math.random()*100+'px';
}
}
setInterval(transform,300);
</script>
</html>
