backdrop-filter: grayscale()

示例

基本示例

使用像 backdrop-grayscale-50 和 backdrop-grayscale 的工具类来控制应用于元素后景的灰度效果：

backdrop-grayscale-0

backdrop-grayscale-50

backdrop-grayscale

<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-grayscale-0 ..."></div>
</div>
<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-grayscale-50 ..."></div>
</div>
<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-grayscale-200 ..."></div>
</div>

使用自定义值

Use the backdrop-grayscale-[<value>] syntax to set the 后景灰度 based on a completely custom value:

<div class="backdrop-grayscale-[0.5] ...">
  <!-- ... -->
</div>

For CSS variables, you can also use the backdrop-grayscale-(<custom-property>) syntax:

<div class="backdrop-grayscale-(--my-backdrop-grayscale) ...">
  <!-- ... -->
</div>

This is just a shorthand for backdrop-grayscale-[var(<custom-property>)] that adds the var() function for you automatically.

响应式设计

Prefix a backdrop-filter: grayscale() utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:

<div class="backdrop-grayscale md:backdrop-grayscale-0 ...">
  <!-- ... -->
</div>

Learn more about using variants in the variants documentation.