在html中将多个类名转换为一个类

Question

我在我的 vue 项目中使用了 tailwind 预定义的 css。

<p class="bg-white text-black focus:text-red focus:bg-white-2 dark:text-white dark:bg-black dark:focus:bg-black-2 dark:focus:text-yellow">some text</p>
<p class="bg-white text-black focus:text-red focus:bg-white-2 dark:text-white dark:bg-black dark:focus:bg-black-2 dark:focus:text-yellow">some text2</p>
<p class="bg-white text-black focus:text-red focus:bg-white-2 dark:text-white dark:bg-black dark:focus:bg-black-2 dark:focus:text-yellow">some text 3</p>
<p class="bg-white text-black focus:text-red focus:bg-white-2 dark:text-white dark:bg-black dark:focus:bg-black-2 dark:focus:text-yellow">some other text</p>
<p class="bg-white text-black focus:text-red focus:bg-white-2 dark:text-white dark:bg-black dark:focus:bg-black-2 dark:focus:text-yellow">more texttttttttt</p>

正如您所看到的，对于每个标签，我必须输入所有这些多个类。 我想要的是有什么方法可以让变量类在这样的类上工作

<p class="grouped-class">text</p>
<p class="grouped-class">text 2</p>
<p class="grouped-class">text 3</p>

Answer 1

你可以使用@apply

HTML：

 <!-- Before extracting a custom class -->
<button class="py-2 px-4 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75">
  Save changes
</button>

<!-- After extracting a custom class -->
<button class="btn-primary">
  Save changes
</button>

CSS：

@tailwind base;
@tailwind components;
@tailwind utilities;

@layer components {
  .btn-primary {
    @apply py-2 px-4 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75;
  }
}

来自顺风文档https://tailwindcss.com/docs/functions-and-directives#layer