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
虽然所有提到的解决方案都非常聪明，但当我尝试它们时，它们似乎都有一些小问题或与页面上的其他元素产生潜在的连锁影响。
最后，为了节省时间，我只是回到了我以前的解决方案:我使用Paint。选择效果，高斯模糊，半径5到10像素，保存为页面图像。: -)
HTML:
<body class="mainbody">
</body
CSS:
body.mainbody
{
background: url('../images/myphoto.blurred.png');
-moz-background-size: cover;
-webkit-background-size: cover;
background-size: cover;
background-position: top center !important;
background-repeat: no-repeat !important;
background-attachment: fixed;
}
编辑:
我终于让它工作了，但解决方案绝不简单!在这里看到的:
过滤器:模糊(1 px);不能在firefox, IE和opera中工作
其他回答
现在，通过使用CSS GRID，这变得更加简单和灵活。你只需要将模糊的背景(imgbg)与文本(h2)重叠即可。
<div class="container">
<div class="imgbg"></div>
<h2>
Lorem ipsum dolor sit amet consectetur, adipisicing elit. Facilis enim
aut rerum mollitia quas voluptas delectus facere magni cum unde?:)
</h2>
</div>
还有css:
.container {
display: grid;
width: 30em;
}
.imgbg {
background: url(bg3.jpg) no-repeat center;
background-size: cover;
grid-column: 1/-1;
grid-row: 1/-1;
filter: blur(4px);
}
.container h2 {
text-transform: uppercase;
grid-column: 1/-1;
grid-row: 1/-1;
z-index: 2;
}
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。
这个答案是为材料设计水平卡片布局动态高度和图像。
为了防止由于卡片的动态高度而导致图像失真，您可以使用带有模糊的背景占位符图像来调整高度的变化。
解释
The card is contained in a <div> with class wrapper, which is a flexbox. The card is made up of two elements, an image which is also a link, and content. The link <a>, class link, is positioned relative. The link consists of two sub-elements, a placeholder <div> class blur and an <img> class pic which is the clear image. Both are positioned absolute and have width: 100%, but class pic has a higher stack order, i.e., z-index: 2, which places it above the placeholder. The background image for the blurred placeholder is set via inline style in the HTML.
Code
.wrapper { display: flex; width: 100%; border: 1px solid rgba(0, 0, 0, 0.16); box-shadow: 0 1px 1px rgba(0, 0, 0, 0.16), 0 1px 1px rgba(0, 0, 0, 0.23); background-color: #fff; margin: 1rem auto; height: auto; } .wrapper:hover { box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); } .link { display: block; width: 200px; height: auto; overflow: hidden; position: relative; border-right: 2px solid #ddd; } .blur { position: absolute; top: 0; left: 0; right: 0; bottom: 0; margin: auto; width: 100%; height: 100%; filter: blur(5px); -webkit-filter: blur(5px); -moz-filter: blur(5px); -o-filter: blur(5px); -ms-filter: blur(5px); } .pic { width: calc(100% - 20px); max-width: 100%; height: auto; margin: auto; position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 2; } .pic:hover { transition: all 0.2s ease-out; transform: scale(1.1); text-decoration: none; border: none; } .content { display: flex; flex-direction: column; width: 100%; max-width: 100%; padding: 20px; overflow-x: hidden; } .text { margin: 0; } <div class="wrapper"> <a href="#" class="link"> <div class="blur" style="background: url('https://i.imgur.com/5SZI6qZ.jpeg') 50% 50% / cover;"></div> <img src="https://i.imgur.com/5SZI6qZ.jpeg" alt="Title" class="pic" /> </a> <div class="content"> <p class="text">Agendum dicendo memores du gi ad. Perciperem occasionem ei ac im ac designabam. Ista rom sibi vul apud tam. Notaverim to extendere expendere concilium ab. Aliae cogor tales fas modus parum sap nullo. Voluntate ingressus infirmari ex mentemque ac manifeste eo. Ac gnum ei utor sive se. Nec curant contra seriem amisit res gaudet adsunt. </p> </div> </div>
div { background: inherit; width: 250px; height: 350px; position: absolute; overflow: hidden; /* Adding overflow hidden */ } div:before { content: ‘’; width: 300px; height: 400px; background: inherit; position: absolute; left: -25px; /* Giving minus -25px left position */ right: 0; top: -25px; /* Giving minus -25px top position */ bottom: 0; box-shadow: inset 0 0 0 200px rgba(255, 255, 255, 0.3); filter: blur(10px); }
$fondo: url(/grid/assets/img/backimage.png);
{ padding: 0; margin: 0; }
body {
::before{
content:"" ; height: 1008px; width: 100%; display: flex; position: absolute;
background-image: $fondo ; background-repeat: no-repeat ; background-position:
center; background-size: cover; filter: blur(1.6rem);
}
}
