「及時」模式:全新世代的 Tailwind CSS
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Border Opacity

Utilities for controlling the opacity of an element's border color.

Default class reference

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

Usage

Control the opacity of an element’s border color using the border-opacity-{amount} utilities.

100%
75%
50%
25%
0%
<div class="border-4 border-light-blue-500 border-opacity-100 ..."></div>
<div class="border-4 border-light-blue-500 border-opacity-75 ..."></div>
<div class="border-4 border-light-blue-500 border-opacity-50 ..."></div>
<div class="border-4 border-light-blue-500 border-opacity-25 ..."></div>
<div class="border-4 border-light-blue-500 border-opacity-0 ..."></div>

Responsive

To control an element’s border color opacity at a specific breakpoint, add a {screen}: prefix to any existing border color opacity utility. For example, use md:border-opacity-50 to apply the border-opacity-50 utility at only medium screen sizes and above.

<div class="border-2 border-blue-500 border-opacity-75 md:border-opacity-50">
  <!-- ... -->
</div>

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

Customizing

To customize the opacity values for all opacity-related utilities at once, use the opacity section of your tailwind.config.js theme configuration:

  // tailwind.config.js
  module.exports = {
    theme: {
      extend: {
        opacity: {
+         '10': '0.1',
+         '20': '0.2',
+         '95': '0.95',
        }
      }
    }
  }

If you want to customize only the border opacity utilities, use the borderOpacity section:

  // tailwind.config.js
  module.exports = {
    theme: {
      extend: {
        borderOpacity: {
+         '10': '0.1',
+         '20': '0.2',
+         '95': '0.95',
        }
      }
    }
  }

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

Variants

默認情況下, 只有 響應式、深色模式 (如果啟用)、group-hover、focus-within、hover 和 focus 的 border opacity 變化模式 (variants) 會產生。

tailwind.config.jsvariants 區塊中變更 borderOpacity 屬性來決定有哪些變化模式會生成。

舉個例子來說,這個設定將會生成 響應式 和 active 的變化模式。

  // tailwind.config.js
  module.exports = {
    variants: {
      extend: {
        // ...
+       borderOpacity: ['responsive', 'active'],
      }
    }
  }

Disabling

如果你不打算在專案中使用 border opacity 功能,可以在你的設定檔裡的 corePlugins 屬性中將 borderOpacity 設定為 false 來停用功能:

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