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How can I implement dark mode switch functionality using Tailwind CSS?
Asked on Apr 20, 2026
Answer
To implement a dark mode switch with Tailwind CSS, you can use the "dark" variant to apply styles conditionally based on a class on the root element. This typically involves toggling a "dark" class on the HTML or body element.
<!-- BEGIN COPY / PASTE -->
<html lang="en" class="dark">
<head>
<script>
// Toggle dark mode
function toggleDarkMode() {
document.documentElement.classList.toggle('dark');
}
</script>
</head>
<body>
<button onclick="toggleDarkMode()">Toggle Dark Mode</button>
<div class="bg-white dark:bg-gray-800 text-black dark:text-white p-4">
This text changes color with dark mode.
</div>
</body>
</html>
<!-- END COPY / PASTE -->Additional Comment:
- The "dark" class is used to apply dark mode styles when present on the root element.
- Tailwind's "dark" variant allows you to define styles that apply only in dark mode.
- JavaScript is used to toggle the "dark" class on the document's root element.
- Ensure your Tailwind configuration includes the dark mode variant, typically set with "darkMode: 'class'" in tailwind.config.js.
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