按下按钮会模糊背景，但在过渡时，div 的边缘过渡效果不佳。除了 Firefox 之外的所有浏览器都存在此问题，我该如何修复它？
var btn = document.querySelector('button');
var div = document.querySelector('div');
btn.addEventListener('click', function() {
div.classList.toggle('blur');
});
body {
margin: 0;
background: url('https://images.pexels.com/photos/2763927/pexels-photo-2763927.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1')no-repeat;
background-size: cover;
}
div {
width: 900px;
height: 900px;
transition: 1s ease;
}
.blur {
backdrop-filter: blur(20px);
transition: 1s ease;
}
<body> <div class="cube"></div> <button>BLUR BUTTON</button> </body>
因为图片填充了
<body>，但是.blur在<div>中，只有900x900像素。快速修复：
更改：
var div = document.querySelector('div');至：
var div = document.body;或者：移动
background: url(..); background-size: ..到div并从那里获取它。var btn = document.querySelector('button'); var div = document.body; btn.addEventListener('click', function() { div.classList.toggle('blur'); });body { margin: 0; background: url('https://images.pexels.com/photos/2763927/pexels-photo-2763927.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1')no-repeat; background-size: cover; } div { width: 900px; height: 900px; transition: 1s ease; } .blur { backdrop-filter: blur(20px); transition: 1s ease; }