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How do you enable dark mode in Tailwind projects?

Asked on Oct 10, 2025

Answer

To enable dark mode in Tailwind CSS, you need to configure it in your `tailwind.config.js` file. Tailwind supports dark mode by using the `dark` variant, which you can apply to your classes.
<!-- BEGIN COPY / PASTE -->
    // tailwind.config.js
    module.exports = {
      darkMode: 'class', // or 'media'
      // other configurations...
    }
    <!-- END COPY / PASTE -->
Additional Comment:
  • Setting `darkMode: 'class'` allows you to toggle dark mode by adding a `dark` class to an element, usually the `` or `` tag.
  • Alternatively, `darkMode: 'media'` enables dark mode based on the user's system preferences.
  • Once configured, use the `dark:` prefix to apply styles for dark mode, e.g., `dark:bg-gray-800`.
  • Ensure your HTML structure supports toggling the `dark` class if using the class strategy.
✅ Answered with Tailwind CSS best practices.

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