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

$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);
    }
}

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>

为此，您需要重新构造HTML。为了模糊背景，你必须模糊整个元素。如果你只想模糊背景，它必须是它自己的元素。

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

CSS网格对我来说更容易理解。：）

html, body { width: 100%; height: 100%; } .container { width: 100%; height: 100%; display: grid; grid-template-columns: 1fr 6fr 1fr; grid-template-rows: 1fr 6fr 1fr; grid-template-areas: '. . .' '. content .' '. . .'; justify-content: center; align-items: center; } .backbround { width: 100%; height: 100%; grid-area: 1/1/5/5; background-image: url(https://i.imgur.com/aUhpEz3.jpg); filter: blur(5px); background-position: center; background-repeat: no-repeat; background-size: cover; } .content { height: 200px; position: relative; grid-area: content; display: flex; justify-content: center; align-items: center; color: white; } <div class="container"> <div class="backbround"></div> <div class="content"><h1>Hello World</h1></div> </div>