[Vuejs]-Convert multiple class name to one class in html

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You can use @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;
  }
}

From the tailwind docs https://tailwindcss.com/docs/functions-and-directives#layer

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