CSS-only Acrylic Material 来自 Fluent Design System
CSS-only Acrylic Material from Fluent Design System
随着 Microsoft Fluent Design System 的出现以及新 Acrylic Material 在 Windows 生态系统中的传播，我认为在某些 Web 布局中使用它会很棒。
根据the spec，亚克力层的组成为：
所以我尝试了一种 CSS-only 受该图片中图层启发的方法，这样：
body {
margin: 0;
font: 1em/1.4 Sans-serif;
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
.acrylic::before {
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.65;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
结果非常接近规格，也很灵敏，但有一个大问题：只需堆叠另一个 .acrylic div，背景技巧就不再起作用了。
问题是： 是否有更智能的高斯模糊方法，而无需为每个 children 复制 body 背景？或者也许有一些更聪明的方法来动态计算它的位置？
更新
自从 backdrop-filter CSS 功能终于 shipped in Chrome 76 in July 29ᵗʰ, we 以来，原来的问题比以前容易多了。
Is there some smarter way to gaussian blur without duplicating the
body background for each children?
据我所知，在这种情况下没有更聪明的方法来实现这一点，因为 background image 和 filter 必须设置为相同的 div 才能创建这个预期的效果。
Or maybe some smarter way to dynamically calculate its position?
据我了解，问题是每增加一个 div .acrylic，图像的背景部分就会重复。
由于您使用的是相同的背景图片，因此只需将 background-attachment: fixed 添加到 div .acrylic::before.
即可解决此问题
body {
margin: 0;
font: 1em/1.4 Sans-serif;
background: url("http://www.wallpapers-web.com/data/out/191/5484624-sunset-wallpapers.jpg") center center;
background-size: 100vw auto;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
.acrylic::before {
background: url("http://www.wallpapers-web.com/data/out/191/5484624-sunset-wallpapers.jpg") center center;
background-size: 100vw auto;
background-attachment: fixed;
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.65;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">Acrylic material!</div>
<div class="acrylic shadow">Acrylic material!</div>
<div class="acrylic shadow">Acrylic material!</div>
</main>
编辑：2022-05-07
使 backdrop-filter 成为第一个选项，现在有了更好的浏览器支持。
我可以想到两种方法...
backdrop-filter 在 .acrylic 上用于现代浏览器
所有（包括旧版）浏览器 .acrylic 上的模糊背景
1。 backdrop-filter .acrylic（现代浏览器）
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
background: rgba(0,0,0,0.5);
-webkit-backdrop-filter: blur(10px);
backdrop-filter: blur(10px);
margin: 7px;
}
body {
background: url("https://images.unsplash.com/photo-1452723312111-3a7d0db0e024?w=700") center/cover;
background-attachment: fixed;
margin: 0;
font: 1em/1.4 Sans-serif;
color: #fff;
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
2。 .acrylic 上的模糊背景（旧版浏览器）
我们也在 .acrylic 元素上复制了 bg，因为降低不透明度会显示它们后面的内容而不是它们里面的内容，AFAIK 没有被模糊滤镜覆盖...
计算位置的明智方法是为 parent 元素 (body) 和 .acrylic 设置 background-attachment: fixed，这将允许您有多个 .acrylic 伙计们 ;)
由于 parent 和 children 使用相同的背景，我们可以将它们组合在一起 ;)
body, .acrylic::before {
background: url("IMG_URL_HERE") center/cover;
background-attachment: fixed;
}
这是一个工作片段；）
将不透明度 .acrylic:after 调低一点，这样背景就更明显了 ;)
body {
margin: 0;
font: 1em/1.4 Sans-serif;
}
body, .acrylic::before {
background: url("https://images.unsplash.com/photo-1452723312111-3a7d0db0e024?w=700") center/cover;
background-attachment: fixed;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
margin: 1em;
}
.acrylic::before {
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.35;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
这个答案解决了问题，我也对其进行了增强。
我认为您遇到的唯一问题是应用于 ::before 的背景对齐方式和正文不同。因此，通过将使用的 CSS 合并为一个，我将其简化为使更新和编辑更容易。
我使用 background:rgba() 而不是 #hex 值来为不透明度控制提供更大的灵活性。
我在整个 CSS 中添加了注释来解释我所做的更改以使它们更加明显。
注意：从 ::after class 中移除不透明度会导致透明度增加并增加噪声纹理的可见性。我相信这是由噪声纹理本身是半透明引起的，但这是一种奇怪的行为，如果其他人知道并且有更好的解释我很想知道。我添加了 classes .nested 和 .parent。因为最好分别控制这些东西。我在第二个示例和第三个示例中都删除了 .parent。
更新：注意到规范中提到的排除混合过滤器未包括在内，所以我也添加了它。在代码段下方提供了来源。
希望这对您有所帮助。 :)
CSS & HTML 包含 3 个示例的代码段：
/* Adding the background source for
both elements together simplifies editing.
Changing the background color #333 to #fff
will produce much more intence effect on
the filter blend */
html,
.acrylic:before {
background: #333 url(https://source.unsplash.com/1600x900/?nature) 50% 100% fixed;
background-size: cover;
}
body {
margin: 0;
font: 1em/1.4 Sans-serif;
}
/*div spacings*/
div {
margin: 5px;
}
main {
display: flex;
align-items: center;
justify-content: center;
flex-flow: row wrap;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
/*Added browser compatibility for blurring added the exclusion blend filter as explained in the original document*/
.acrylic::before {
content: '';
position: absolute;
z-index: -1;
height: 100%;
top: 0;
right: 0;
left: 0;
filter: blur(8px);
-webkit-filter: blur(8px);
-moz-filter: blur(8px);
-o-filter: blur(8px);
-ms-filter: blur(8px);
background-blend-mode: exclusion;
}
/*made color rgba removed opacity property*/
.acrylic::after {
content: "";
position: absolute;
height: 100%;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
border: 1px solid #fff;
background-image: url(data:image/png;base64,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);
}
/*Individual control over
.nested and .parent opacity and color.*/
.parent::after {
background-color: rgba(230, 240, 255, 0.50);
opacity: 0.60;
}
.child::after {
background-color: rgba(230, 240, 255, 0.30);
opacity: 0.60;
}
.shadow {
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2), 0 1px 8px rgba(0, 0, 0, 0.4);
}
<body>
<main>
<div class="acrylic shadow parent">
<div class="acrylic child">
Acrylic material! <br />.parent on .child on
</div>
</div>
<div class="acrylic shadow">
<div class="acrylic child">
Acrylic material! <br />.parent off .child on
</div>
</div>
<div class="acrylic shadow">
<div class="acrylic">
Acrylic material! <br />.parent off .child off
</div>
</div>
</main>
</body>
来源和附加说明：
您可以在 CSS Tricks here.
上找到前玻璃效果的来源
The duplicate image technique requires maintaining a blurred image
along with the original, which can become a pain if you need to reuse
the effect for multiple images. For example, responsive designs may
require swapping in different images at different screen sizes. Or,
template layouts may drop in images dynamically (eg, a different
header image for every blog post). For these cases, it would be nice
to generate the effect using only the source image. After all, we're
just blurring it.
他们还说，如果你想提供更多的浏览器支持，你可以添加 SVG 过滤器作为后备，尽管我没有将它添加到我自己的代码片段中，他们是这样说的：
CSS Filters are somewhat new. That means they may be vendor prefixed,
and that their browser support is not yet universal. However, filters
have a longer history in SVG, and applying SVG filters to HTML content
via CSS has wider browser support. You can easily add them as a
fallback for when CSS filters are not supported. The above demo
actually does just that.
To add an SVG filter, we include some inline SVG in our HTML markup,
and reference the filter with a url(). Pro tip: An alternative is to
encode the SVG filter and reference as a data url, but that format is
a bit more difficult to read in an article.
并提供了代码示例
SVG：
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="blur">
<feGaussianBlur stdDeviation="5" />
</filter>
</defs>
</svg>
CSS
.glass::before {
background-image: url('pelican.jpg');
/* Fallback to SVG filters */
filter: url('#blur');
filter: blur(5px);
}
有关 CSS 过滤器混合的更多信息，请访问此处
https://css-tricks.com/basics-css-blend-modes
backdrop-filter CSS 功能终于 shipped in Chrome 76 since July 29ᵗʰ 2019. Unfortunately, Firefox already delayed it a lot, and besides it's already implemented and working there behind a flag, it's really uncertain when it'll be available by default without the flag。
但凭借非常不错的 support on about 90% browsers，它显然是目前渐进式增强用例的最佳选择。所以，我相信现在最好的答案很简单：
/* Now all the acrylic layer is just only one class! */
.acrylic {
/* Parent background + Gaussian blur */
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
/* Exclusion blend */
background-blend-mode: exclusion;
/* Color/tint overlay + Opacity */
background: rgba(255, 255, 255, .6);
/* Tiled noise texture */
background-image: url(data:image/png;base64,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);
}
/* Other styles for sample purposes... */
body {
margin: 0;
padding: 1.5em;
font: 1em/1.4 Sans-serif;
/* Now our background image is defined only in the body! */
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
}
main {
display: grid;
gap: 1.5rem;
justify-content: center;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
grid-auto-rows: minmax(120px, auto);
}
div {
padding: 1.5em;
border-radius: 1px;
border: 1px solid rgba(255, 255, 255, .2);
box-shadow: 0 10px 30px rgba(0, 0, 0, .1), 0 1px 8px rgba(0, 0, 0, .2);
text-align: center;
display: flex;
align-items: center;
justify-content: center;
}
<main>
<div class="acrylic">
Acrylic material!
</div>
<div class="acrylic">
<div class="acrylic">
Acrylic inside acrylic!
</div>
</div>
<div class="acrylic">
Acrylic material!
</div>
<div class="acrylic">
Acrylic material!
</div>
</main>
随着 Microsoft Fluent Design System 的出现以及新 Acrylic Material 在 Windows 生态系统中的传播，我认为在某些 Web 布局中使用它会很棒。
根据the spec，亚克力层的组成为：
所以我尝试了一种 CSS-only 受该图片中图层启发的方法，这样：
body {
margin: 0;
font: 1em/1.4 Sans-serif;
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
.acrylic::before {
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.65;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
结果非常接近规格，也很灵敏，但有一个大问题：只需堆叠另一个 .acrylic div，背景技巧就不再起作用了。
问题是： 是否有更智能的高斯模糊方法，而无需为每个 children 复制 body 背景？或者也许有一些更聪明的方法来动态计算它的位置？
更新
自从 backdrop-filter CSS 功能终于 shipped in Chrome 76 in July 29ᵗʰ, we
Is there some smarter way to gaussian blur without duplicating the body background for each children?
据我所知，在这种情况下没有更聪明的方法来实现这一点，因为 background image 和 filter 必须设置为相同的 div 才能创建这个预期的效果。
Or maybe some smarter way to dynamically calculate its position?
据我了解，问题是每增加一个 div .acrylic，图像的背景部分就会重复。
由于您使用的是相同的背景图片，因此只需将 background-attachment: fixed 添加到 div .acrylic::before.
body {
margin: 0;
font: 1em/1.4 Sans-serif;
background: url("http://www.wallpapers-web.com/data/out/191/5484624-sunset-wallpapers.jpg") center center;
background-size: 100vw auto;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
.acrylic::before {
background: url("http://www.wallpapers-web.com/data/out/191/5484624-sunset-wallpapers.jpg") center center;
background-size: 100vw auto;
background-attachment: fixed;
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.65;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">Acrylic material!</div>
<div class="acrylic shadow">Acrylic material!</div>
<div class="acrylic shadow">Acrylic material!</div>
</main>
编辑：2022-05-07
使 backdrop-filter 成为第一个选项，现在有了更好的浏览器支持。
我可以想到两种方法...
backdrop-filter在.acrylic上用于现代浏览器所有（包括旧版）浏览器
.acrylic上的模糊背景
1。 backdrop-filter .acrylic（现代浏览器）
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
background: rgba(0,0,0,0.5);
-webkit-backdrop-filter: blur(10px);
backdrop-filter: blur(10px);
margin: 7px;
}
body {
background: url("https://images.unsplash.com/photo-1452723312111-3a7d0db0e024?w=700") center/cover;
background-attachment: fixed;
margin: 0;
font: 1em/1.4 Sans-serif;
color: #fff;
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
2。 .acrylic 上的模糊背景（旧版浏览器）
我们也在 .acrylic 元素上复制了 bg，因为降低不透明度会显示它们后面的内容而不是它们里面的内容，AFAIK 没有被模糊滤镜覆盖...
计算位置的明智方法是为 parent 元素 (body) 和 .acrylic 设置 background-attachment: fixed，这将允许您有多个 .acrylic 伙计们 ;)
由于 parent 和 children 使用相同的背景，我们可以将它们组合在一起 ;)
body, .acrylic::before {
background: url("IMG_URL_HERE") center/cover;
background-attachment: fixed;
}
这是一个工作片段；）
将不透明度 .acrylic:after 调低一点，这样背景就更明显了 ;)
body {
margin: 0;
font: 1em/1.4 Sans-serif;
}
body, .acrylic::before {
background: url("https://images.unsplash.com/photo-1452723312111-3a7d0db0e024?w=700") center/cover;
background-attachment: fixed;
}
main {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
margin: 1em;
}
.acrylic::before {
filter: blur(10px);
content: "";
position: absolute;
left: -10px;
top: -10px;
width: calc(100% + 20px);
height: calc(100% + 20px);
z-index: -1;
}
.acrylic::after {
content: "";
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
opacity: 0.35;
border: 1px solid #fff;
background: #fff;
background-image: url(data:image/png;base64,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);
}
.shadow {
border-radius: 1px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.2);
}
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
<main>
<div class="acrylic shadow">
Acrylic material!
</div>
</main>
这个答案解决了问题，我也对其进行了增强。
我认为您遇到的唯一问题是应用于 ::before 的背景对齐方式和正文不同。因此，通过将使用的 CSS 合并为一个，我将其简化为使更新和编辑更容易。
我使用 background:rgba() 而不是 #hex 值来为不透明度控制提供更大的灵活性。
我在整个 CSS 中添加了注释来解释我所做的更改以使它们更加明显。
注意：从 ::after class 中移除不透明度会导致透明度增加并增加噪声纹理的可见性。我相信这是由噪声纹理本身是半透明引起的，但这是一种奇怪的行为，如果其他人知道并且有更好的解释我很想知道。我添加了 classes .nested 和 .parent。因为最好分别控制这些东西。我在第二个示例和第三个示例中都删除了 .parent。
更新：注意到规范中提到的排除混合过滤器未包括在内，所以我也添加了它。在代码段下方提供了来源。
希望这对您有所帮助。 :)
CSS & HTML 包含 3 个示例的代码段：
/* Adding the background source for
both elements together simplifies editing.
Changing the background color #333 to #fff
will produce much more intence effect on
the filter blend */
html,
.acrylic:before {
background: #333 url(https://source.unsplash.com/1600x900/?nature) 50% 100% fixed;
background-size: cover;
}
body {
margin: 0;
font: 1em/1.4 Sans-serif;
}
/*div spacings*/
div {
margin: 5px;
}
main {
display: flex;
align-items: center;
justify-content: center;
flex-flow: row wrap;
height: 100vh;
}
.acrylic {
padding: 4em 6em;
position: relative;
overflow: hidden;
}
/*Added browser compatibility for blurring added the exclusion blend filter as explained in the original document*/
.acrylic::before {
content: '';
position: absolute;
z-index: -1;
height: 100%;
top: 0;
right: 0;
left: 0;
filter: blur(8px);
-webkit-filter: blur(8px);
-moz-filter: blur(8px);
-o-filter: blur(8px);
-ms-filter: blur(8px);
background-blend-mode: exclusion;
}
/*made color rgba removed opacity property*/
.acrylic::after {
content: "";
position: absolute;
height: 100%;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: -1;
border: 1px solid #fff;
background-image: url(data:image/png;base64,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);
}
/*Individual control over
.nested and .parent opacity and color.*/
.parent::after {
background-color: rgba(230, 240, 255, 0.50);
opacity: 0.60;
}
.child::after {
background-color: rgba(230, 240, 255, 0.30);
opacity: 0.60;
}
.shadow {
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2), 0 1px 8px rgba(0, 0, 0, 0.4);
}
<body>
<main>
<div class="acrylic shadow parent">
<div class="acrylic child">
Acrylic material! <br />.parent on .child on
</div>
</div>
<div class="acrylic shadow">
<div class="acrylic child">
Acrylic material! <br />.parent off .child on
</div>
</div>
<div class="acrylic shadow">
<div class="acrylic">
Acrylic material! <br />.parent off .child off
</div>
</div>
</main>
</body>
来源和附加说明：
您可以在 CSS Tricks here.
上找到前玻璃效果的来源The duplicate image technique requires maintaining a blurred image along with the original, which can become a pain if you need to reuse the effect for multiple images. For example, responsive designs may require swapping in different images at different screen sizes. Or, template layouts may drop in images dynamically (eg, a different header image for every blog post). For these cases, it would be nice to generate the effect using only the source image. After all, we're just blurring it.
他们还说，如果你想提供更多的浏览器支持，你可以添加 SVG 过滤器作为后备，尽管我没有将它添加到我自己的代码片段中，他们是这样说的：
CSS Filters are somewhat new. That means they may be vendor prefixed, and that their browser support is not yet universal. However, filters have a longer history in SVG, and applying SVG filters to HTML content via CSS has wider browser support. You can easily add them as a fallback for when CSS filters are not supported. The above demo actually does just that.
To add an SVG filter, we include some inline SVG in our HTML markup, and reference the filter with a url(). Pro tip: An alternative is to encode the SVG filter and reference as a data url, but that format is a bit more difficult to read in an article.
并提供了代码示例
SVG：
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="blur">
<feGaussianBlur stdDeviation="5" />
</filter>
</defs>
</svg>
CSS
.glass::before {
background-image: url('pelican.jpg');
/* Fallback to SVG filters */
filter: url('#blur');
filter: blur(5px);
}
有关 CSS 过滤器混合的更多信息，请访问此处 https://css-tricks.com/basics-css-blend-modes
backdrop-filter CSS 功能终于 shipped in Chrome 76 since July 29ᵗʰ 2019. Unfortunately, Firefox already delayed it a lot, and besides it's already implemented and working there behind a flag, it's really uncertain when it'll be available by default without the flag。
但凭借非常不错的 support on about 90% browsers，它显然是目前渐进式增强用例的最佳选择。所以，我相信现在最好的答案很简单：
/* Now all the acrylic layer is just only one class! */
.acrylic {
/* Parent background + Gaussian blur */
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
/* Exclusion blend */
background-blend-mode: exclusion;
/* Color/tint overlay + Opacity */
background: rgba(255, 255, 255, .6);
/* Tiled noise texture */
background-image: url(data:image/png;base64,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);
}
/* Other styles for sample purposes... */
body {
margin: 0;
padding: 1.5em;
font: 1em/1.4 Sans-serif;
/* Now our background image is defined only in the body! */
background: url("https://cdn.pixabay.com/photo/2017/03/27/16/50/beach-2179624_1280.jpg") center center;
background-size: 100vw auto;
}
main {
display: grid;
gap: 1.5rem;
justify-content: center;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
grid-auto-rows: minmax(120px, auto);
}
div {
padding: 1.5em;
border-radius: 1px;
border: 1px solid rgba(255, 255, 255, .2);
box-shadow: 0 10px 30px rgba(0, 0, 0, .1), 0 1px 8px rgba(0, 0, 0, .2);
text-align: center;
display: flex;
align-items: center;
justify-content: center;
}
<main>
<div class="acrylic">
Acrylic material!
</div>
<div class="acrylic">
<div class="acrylic">
Acrylic inside acrylic!
</div>
</div>
<div class="acrylic">
Acrylic material!
</div>
<div class="acrylic">
Acrylic material!
</div>
</main>