<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
<title>JS+CSS实现日月交替效果</title>
<link href="https://cdn.bootcdn.net/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<link rel="stylesheet" href="css/base.css">
<script>
function change(str){
document.getElementById('container').setAttribute('class',str);
}
</script>
</head>
<body>
<div class="btn-box">
<div onclick="change('light')">
<i class="fa fa-sun-o" aria-hidden="true"></i> 太阳
</div>
<div onclick="change('dark')">
<i class="fa fa-moon-o" aria-hidden="true"></i> 月亮
</div>
</div>
<div class="dark" id="container">
<div class="bg"></div>
<div class="moon-box">
<div class="moon"></div>
</div>
<div class="sun-box">
<div class="sun"></div>
</div>
<div class="sea"></div>
</div>
</body>
</html>
