在模糊的背景上清除文本 [英] clear text on top of blurry background

问题描述

我正在使用CSS过滤器创建模糊的背景，并在其顶部放置文本.但是当我尝试时，文本上也会发生模糊效果.如何避免这种情况并使文字不模糊?

I am using CSS filters to create a blurry background and have text lay on top. But when I try, the blurry effect is taking place on the text as well. How can I avoid this and keep the text non-blurry?

HTML

<div id="intro">
   <h1 id="tagline">A dinner to remember...</h1>
</div>

CSS

#intro{
background:url(../img/meal.jpg) no-repeat;
background-size: cover;
height: 500px;
 filter: blur(5px);
-webkit-filter: blur(5px);
-moz-filter: blur(5px);
-o-filter: blur(5px);
-ms-filter: blur(5px);

}

#tagline {
text-align: center;
font-family: 'Lobster', cursive;
position: relative;
font-size: 4em;
color: #fff;

}

屏幕截图: http://d.pr/i/fAFe

推荐答案

您不能在模糊的父元素中取消模糊"元素.您可以使用放置在标语后面的绝对定位的伪元素来解决此问题:

You can't "unblur" an element within a blurred parent element. You can work around that with an absolutely positioned pseudo element, stacked behind your tagline:

#intro {
    height: 500px;
    position: relative;
}

#intro:before {
    content: "";
    background:url(../img/meal.jpg) no-repeat;
    background-size: cover;
    width: 100%;
    height: 500px;
    position: absolute;
    z-index: -1;
    filter: blur(5px);
}

#tagline {
    text-align: center;
    font-family: 'Lobster', cursive;
    font-size: 4em;
    color: #fff;
}

JSFiddle

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