<!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>
<style>
* { margin: 0; padding: 0; }
.bg { background: url('./images/1.jpg'); display: flex; justify-content: center; }
.normal { width: 300px; height: 200px; background: rgba(255, 255, 255, .7); }
.g-filter { width: 300px; height: 200px; background: rgba(255, 255, 255, .7); filter: blur(6px); }
.g-backdrop-filter { width: 300px; height: 200px; background: rgba(255, 255, 255, .7); backdrop-filter: blur(6px); }
</style>
</head>
<body>
<div class="bg">
<div class="normal">Normal</div>
<div class="g-filter">filter</div>
<div class="g-backdrop-filter">backdrop-filter</div>
</div>
</body>
</html>