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Backdrop Opacity

Tailwind CSS version

Utilities for applying backdrop opacity filters to an element.

Default class reference

backdrop-opacity-0--tw-backdrop-opacity: opacity(0);
backdrop-opacity-5--tw-backdrop-opacity: opacity(0.05);
backdrop-opacity-10--tw-backdrop-opacity: opacity(0.1);
backdrop-opacity-20--tw-backdrop-opacity: opacity(0.2);
backdrop-opacity-25--tw-backdrop-opacity: opacity(0.25);
backdrop-opacity-30--tw-backdrop-opacity: opacity(0.3);
backdrop-opacity-40--tw-backdrop-opacity: opacity(0.4);
backdrop-opacity-50--tw-backdrop-opacity: opacity(0.5);
backdrop-opacity-60--tw-backdrop-opacity: opacity(0.6);
backdrop-opacity-70--tw-backdrop-opacity: opacity(0.7);
backdrop-opacity-75--tw-backdrop-opacity: opacity(0.75);
backdrop-opacity-80--tw-backdrop-opacity: opacity(0.8);
backdrop-opacity-90--tw-backdrop-opacity: opacity(0.9);
backdrop-opacity-95--tw-backdrop-opacity: opacity(0.95);
backdrop-opacity-100--tw-backdrop-opacity: opacity(1);


Use the backdrop-opacity-{amount} utilities alongside the backdrop-filter utility to control the opacity of other backdrop filters applied to an element.

<div class="backdrop-filter backdrop-opacity-80 ...">
  <!-- ... -->


To control an element’s backdrop opacity at a specific breakpoint, add a {screen}: prefix to any existing backdrop opacity utility. For example, use md:backdrop-opacity-lg to apply the backdrop-opacity-lg utility at only medium screen sizes and above.

<div class="backdrop-filter backdrop-opacity-sm md:backdrop-opacity-lg ...">
  <!-- ... -->

For more information about Tailwind’s responsive design features, check out the Responsive Design documentation.


You can customize which backdrop-opacity utilities are generated using the backdropOpacity key in the theme section of your tailwind.config.js file.

  // tailwind.config.js
  module.exports = {
    theme: {
+     extend: {
+       backdropOpacity: {
+         15: '.15',
+       }
+     }

Learn more about customizing the default theme in the theme customization documentation.


默认情况下, 针对 backdrop opacity 功能类,只生成 responsive 变体。

您可以通过修改您的 tailwind.config.js 文件中的 variants 部分中的 backdropOpacity 属性来控制为 backdrop opacity 功能生成哪些变体。

例如,这个配置将生成 hover and focus 变体:

  // tailwind.config.js
  module.exports = {
    variants: {
      extend: {
        // ...
+       backdropOpacity: ['hover', 'focus'],


如果您不打算在您的项目中使用 backdrop opacity 功能,您可以通过在配置文件的 corePlugins 部分将 backdropOpacity 属性设置为 false 来完全禁用它们:

  // tailwind.config.js
  module.exports = {
    corePlugins: {
      // ...
+     backdropOpacity: false,