<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
#someDiv{
width: 300px;
height: 300px;
background-color: aqua;
opacity: 1;
}
</style>
<body>
<div id="someDiv"></div>
<script>
var div =document.getElementById("somerDiv");
var opacity =1;
var fade =setInterval(function(){
opacity-=0.05;
if(opacity >0){
div.style.opacity=opacity;
}else{
clearInterval(fade)
}
},60)
</script>
</body>
</html>运行不了
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