我有一个JPEG文件，我使用作为搜索页面的背景图像，我使用CSS来设置它，因为我在Backbone.js上下文中工作:
background-image: url("whatever.jpg");
我想应用css3模糊过滤器只对背景，但我不确定如何样式只是一个元素。如果我试着:
-webkit-filter: blur(5px);
-moz-filter: blur(5px);
-o-filter: blur(5px);
-ms-filter: blur(5px);
filter: blur(5px);
就在我的CSS中的background-image下面，它为整个页面设置了样式，而不仅仅是背景。是否有一种方法只选择图像并应用过滤器?或者，有没有一种方法可以关闭页面上所有其他元素的模糊效果?
当前回答
在CSS的.content选项卡中将其更改为position:absolute。否则，渲染的页面将不可滚动。
其他回答
当然，这不是css解决方案，但你可以使用CDN质子过滤器:
body {
background: url('https://i0.wp.com/IMAGEURL?w=600&filter=blurgaussian&smooth=1');
}
它来自https://developer.wordpress.com/docs/photon/api/#filter
请检查以下代码:-
.backgroundImageCVR{ position:relative; padding:15px; } .background-image{ position:absolute; left:0; right:0; top:0; bottom:0; background:url('https://i.imgur.com/5SZI6qZ.jpeg'); background-size:cover; z-index:1; -webkit-filter: blur(10px); -moz-filter: blur(10px); -o-filter: blur(10px); -ms-filter: blur(10px); filter: blur(10px); } .content{ position:relative; z-index:2; color:#fff; } <div class="backgroundImageCVR"> <div class="background-image"></div> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis aliquam erat in ante malesuada, facilisis semper nulla semper. Phasellus sapien neque, faucibus in malesuada quis, lacinia et libero. Sed sed turpis tellus. Etiam ac aliquam tortor, eleifend rhoncus metus. Ut turpis massa, sollicitudin sit amet molestie a, posuere sit amet nisl. Mauris tincidunt cursus posuere. Nam commodo libero quis lacus sodales, nec feugiat ante posuere. Donec pulvinar auctor commodo. Donec egestas diam ut mi adipiscing, quis lacinia mauris condimentum. Quisque quis odio venenatis, venenatis nisi a, vehicula ipsum. Etiam at nisl eu felis vulputate porta.</p> <p>Fusce ut placerat eros. Aliquam consequat in augue sed convallis. Donec orci urna, tincidunt vel dui at, elementum semper dolor. Donec tincidunt risus sed magna dictum, quis luctus metus volutpat. Donec accumsan et nunc vulputate accumsan. Vestibulum tempor, erat in mattis fringilla, elit urna ornare nunc, vel pretium elit sem quis orci. Vivamus condimentum dictum tempor. Nam at est ante. Sed lobortis et lorem in sagittis. In suscipit in est et vehicula.</p> </div> </div>
你可以在你想要应用过滤器的图像上创建一个div，并使用backdrop-filter到它的CSS类。 看看这个链接
<!-- Q:Create the blur on parenttal div without effecting the child div -->
<!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>
*{
margin: 0; padding: 0; box-sizing: border-box;
font-size: 30px;
}
.parent{
background-image:url(hobby.jpg) ;
height: 100vh;
width: 100vw;
background-repeat: no-repeat;
background-size: cover;
background-position: center;
display: flex;
justify-content: center;
align-items: center;
}
.child{
height: 90vh;
width: 90vw;
backdrop-filter: blur(10px);
border: 1px solid rgba(0, 0, 0, 0.418);
justify-content: center;
align-items: center;
display: flex;
}
.text{
height: 300px;
width: 300px;
border-radius: 500px;
background-image: url(50cf380e5c78eb174faa8e6ac2cb654a.jpg);
background-size: cover;
background-position: center;
}
</style>
<body>
<div class="parent">
<div class="child">
<div class="text"></div>
</div>
</div>
</body>
</html>
我没有写这个，但是我注意到使用CSS SASS编译器有一个部分支持的后台过滤器的polyfill，所以如果你有一个编译管道，它可以很好地实现(它也使用TypeScript):
https://codepen.io/mixal_bl4/pen/EwPMWo
