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How can I implement dark mode toggle with Tailwind CSS and JavaScript?

Asked on Dec 13, 2025

Answer

To implement a dark mode toggle using Tailwind CSS, you can utilize the `dark` variant in Tailwind combined with a simple JavaScript toggle to switch themes. This involves adding a class to the HTML element to enable dark mode styling.

<!-- BEGIN COPY / PASTE -->
    <html lang="en">
    <head>
      <script>
        function toggleDarkMode() {
          document.documentElement.classList.toggle('dark');
        }
      </script>
    </head>
    <body class="bg-white dark:bg-gray-900 text-black dark:text-white">
      <button onclick="toggleDarkMode()" class="p-2 bg-gray-200 dark:bg-gray-800 rounded">
        Toggle Dark Mode
      </button>
      <div class="p-4">
        <h1 class="text-xl">Hello, World!</h1>
        <p>This is a simple dark mode toggle example.</p>
      </div>
    </body>
    </html>
    <!-- END COPY / PASTE -->

Additional Comment:

Tailwind's `dark` variant allows you to apply styles conditionally based on the presence of a `dark` class on the HTML element.
Use JavaScript to toggle the `dark` class on the `document.documentElement` (the `` tag) to switch between light and dark modes.
Ensure your Tailwind configuration file includes the `darkMode` option set to 'class' to enable this functionality.
Consider storing the user's preference in local storage for persistence across sessions.

✅ Answered with Tailwind CSS best practices.

Ask any question about Tailwind CSS here... and get an instant response.

How can I implement dark mode toggle with Tailwind CSS and JavaScript?

Asked on Dec 13, 2025

Answer

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