背景模糊的 div 没有覆盖整个屏幕。

huangapple
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英文:

Backdrop blurred div is not covering entire screen

问题

我有一个叫做overlay的div，然后有一个叫做signupContainer的容器。我想让overlay div覆盖整个屏幕，但在背景中进行模糊处理。这是我的代码：

  1. <!-- begin snippet: js hide: false console: true babel: false -->
  3. <!-- language: lang-css -->
  4. html, body {
  5.     background-image: url('https://host.stcollier.repl.co/img.png');
  6.     background-position: center;
  7.     background-attachment: fixed;
  8.     background-repeat: no-repeat;
  9.     background-size: 1000px;
  10.     background-color: rgba(255, 255, 255, 0.5);
  11. }
  13. .blur {
  14.     width: 100%;
  15.     height: 100%;
  16.     padding: 0;
  17.     margin: 0;
  18.     z-index: -99;
  19.     backdrop-filter: blur(10px);
  20.     position: fixed;
  21.     top: 0;
  22.     left: 0;
  23. }
  25. .signupContainer {
  26.     padding-top: 75px;
  27.     display: flex;
  28.     flex-direction: column;
  29.     justify-content: center;
  30.     align-items: center;
  31.     width: 100%;
  32.     z-index: 99;
  33.     color: white;
  34. }
  36. <!-- language: lang-html -->
  37. <div class="blur"></div>
  39. <div class="signupContainer">
  40.   <h1>Sign Up</h1>
  41. </div>
  43. <!-- end snippet -->

这是它的外观：
背景模糊的 div 没有覆盖整个屏幕。

请注意，背景滤镜模糊效果未覆盖整个屏幕，而只到其他元素的位置。这是为什么，如何修复这个问题？

英文:

I have a div called overlay and then a container called signupContainer. I want the overlay div to cover the entire screen but be blurred in the background. This is my code:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-css -->

  1. html, body {
  2.     background-image: url(&#39;https://host.stcollier.repl.co/img.png&#39;);
  3.     background-position: center;
  4.     background-attachment: fixed;
  5.     background-repeat: no-repeat;
  6.     background-size: 1000px;
  7.     background-color: rgba(255, 255, 255 0.5);
  9. }
  11. .blur {
  12.     width: 100%;
  13.     height: 100%;
  14.     padding: 0;
  15.     margin: 0;
  16.     z-index: -99;
  17.     backdrop-filter: blur(10px);
  18.     position: fixed;
  19.     top: 0;
  20.     left: 0;
  21. }
  23. .signupContainer {
  24.     padding-top: 75px;
  25.     display: flex;
  26.     flex-direction: column;
  27.     justify-content: center;
  28.     align-items: center;
  29.     width: 100%;
  30.     z-index: 99;
  31.     color: white;
  32. }

<!-- language: lang-html -->

  1. &lt;div class=&quot;blur&quot;&gt;&lt;/div&gt;
  3. &lt;div class=&quot;signupContainer&quot;&gt;
  4.   &lt;h1&gt;Sign Up&lt;/h1&gt;
  5. &lt;/div&gt;

<!-- end snippet -->
Here's how that looks:
背景模糊的 div 没有覆盖整个屏幕。
Notice how the backdrop filter blur is not covering the entire screen, but only the point to where other element is. Why is this and how can I fix this?

答案1

得分: 2

只需从第一个规则中删除HTML选择器，然后它就会起作用。您不必要地应用了两个背景图像，似乎这导致了错误的渲染。

  1. body {
  2.     background-image: url('https://host.stcollier.repl.co/img.png');
  3.     background-position: center;
  4.     background-attachment: fixed;
  5.     background-repeat: no-repeat;
  6.     background-size: 1000px;
  7.     background-color: rgba(255, 255, 255, 0.5);
  8. }
英文:

Just remove the html selector from the first rule, and then it will work. You're applying two background images unnecessarily and it seems that this is causing a wrong rendering.

  1. body {
  2.     background-image: url(&#39;https://host.stcollier.repl.co/img.png&#39;);
  3.     background-position: center;
  4.     background-attachment: fixed;
  5.     background-repeat: no-repeat;
  6.     background-size: 1000px;
  7.     background-color: rgba(255, 255, 255 0.5);
  8. }

答案2

得分: 1

因为背景位置是相对的，所以它没有覆盖整个页面。

你可以使用这个代码：

  1. .blur {
  2.     position: absolute;
  3.     width: 100vw;
  4.     height: 100vh;
  5.     padding: 0;
  6.     margin: 0;
  7.     z-index: -99;
  8.     backdrop-filter: blur(10px);
  9.     position: fixed;
  10.     top: 0;
  11.     left: 0;
  12. }
英文:

It's because the backdrop position is relative so it's not covering the entire page.

you could use this:

  1. .blur {
  2.     position: absolute;
  3.     width: 100vw;
  4.     height: 100vh;
  5.     padding: 0;
  6.     margin: 0;
  7.     z-index: -99;
  8.     backdrop-filter: blur(10px);
  9.     position: fixed;
  10.     top: 0;
  11.     left: 0;
  12. }

huangapple
  • 本文由 发表于 2023年3月7日 02:59:43
  • 转载请务必保留本文链接：https://go.coder-hub.com/75654787.html
  • css
  • html
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