README.md

Tailwindcss prefers dark mode

Tailwind CSS plugin that adds variants for @media (prefers-color-scheme: dark). It can also generate dark variants with an activator CSS class on the html, body or any parent tag making the dark classes active allowing easily switch between light and dark theme.

Installation

npm install tailwindcss-prefers-dark-mode --save-dev

Add the plugin to the plugins array in your tailwind.config.js file.

module.exports = {
  // ...

  plugins: [
    // ...
    require('tailwindcss-prefers-dark-mode')({
      type: 'mediaQuery', // 'mediaQuery' or 'class'
      className: '.dark-mode', // Activator css class if type === 'class'
      prefix: 'dark' // Class name prefix for naming dark variants
    })
  ]
};

Plugin params

You can customize how dark variants are generated depending on the params passed to the plugin. The old behaviour was passing no params or just an empty string. You can continue using the old config but passing an object is prefered. These are the different posibilities:

• No params. If no param is supplied, variants will be under @media (prefers-color-scheme: dark) and the default prefix for classes will be dark.

require('tailwindcss-prefers-dark-mode')();

• Passing an string. In this case variants will be generated under @media (prefers-color-scheme: dark) but the prefix for classes will be the string passed. For example, with prefers-dark:

require('tailwindcss-prefers-dark-mode')('prefers-dark');

• Passing an object allows you to choose between generate variants with @media (prefers-color-scheme: dark) or generate with an activator CSS class. Object properties:
  • type: mediaQuery if you want the option with @media (prefers-color-scheme: dark) or class if you prefer an activator CSS class. This field is required.
  • className: The activator CSS class if type is class. If no className is provided, .dark-mode class will be used as default.
  • prefix: Prefix for naming dark variants. If no prefix is provided, dark will be used as default.

require('tailwindcss-prefers-dark-mode')({
  type: 'class', // 'mediaQuery'
  className: '.dark-mode',
  prefix: 'dark'
});

Variants generated

• dark
• dark:hover
• dark:focus
• dark:active
• dark:disabled
• dark:odd
• dark:even
• dark:group-hover
• dark:focus-within
• dark:placeholder

<div class="bg-gray-100 dark:bg-gray-800 border-t-4 border-green-500">
  <nav class="flex flex-wrap justify-end items-center p-4">
    <a class="text-gray-700 hover:bg-gray-300 dark:hover:bg-transparent dark:focus:text-green-500" href="#">Text</a>
  </nav>
</div>

Dark variants must be enabled on each utility in your tailwind.config.js file.

variants: {
    backgroundColor: [
      "responsive",
      "hover",
      "focus",
      "dark",
      "dark:hover",
      "dark:focus"
    ],
    borderColor: [
      "responsive",
      "hover",
      "focus",
      "dark",
      "dark:hover",
      "dark:focus"
    ],
    textColor: [
      "responsive",
      "hover",
      "focus",
      "group-hover",
      "dark",
      "dark:hover",
      "dark:focus",
      "dark:group-hover",
      "focus-within",
      "dark:focus-within",
      "dark:odd",
      "dark:even",
      "dark:active",
      "dark:disabled"
    ],
    borderStyle: ["responsive", "dark"],
    placeholderColor: ['responsive', 'focus', 'dark:placeholder']
  }

You can check the full list of default variants in Tailwind default config file.

Use @apply to inline any existing utility classes in dark mode

With @media (prefers-color-scheme: dark)

Just use prefers-color-scheme CSS media feature and apply Tailwind classes.

.btn {
  @apply font-bold py-2 px-4 rounded bg-red-500;
}

@media (prefers-color-scheme: dark) {
  .btn {
    @apply bg-gray-500;
  }
}

With activator CSS class

Just add the activator CSS class at the beggining of the selector and apply Tailwind classes.

.btn {
  @apply font-bold py-2 px-4 rounded bg-red-500;
}

.dark-mode .btn {
  @apply bg-gray-500;
}

Customize class name prefix for variants

dark is used as default prefix for variants generated. It´s possible to change dark for whatever you want, just pass any string as param or use prefix key if you pass an object as param to the plugin. For example, with prefers-dark:

module.exports = {
  // ...

  plugins: [
    // ...
    require('tailwindcss-prefers-dark-mode')('prefers-dark')
  ]
};

module.exports = {
  // ...

  plugins: [
    // ...
    require('tailwindcss-prefers-dark-mode')({
      type: 'class', // 'mediaQuery'
      className: '.dark-mode',
      prefix: 'prefers-dark'
    })
  ]
};

And variants must be named with the new prefix:

variants: {
  textColor: [
    'responsive',
    'hover',
    'focus',
    'group-hover',
    'prefers-dark',
    'prefers-dark:hover',
    'prefers-dark:focus',
    'prefers-dark:group-hover',
    'focus-within',
    'prefers-dark:focus-within'
  ];
}

Alternatives

If you're looking for a more complex approach, a different kind of configuration, or just want to know the alternatives, here is a list that you may find useful:

• tailwindcss-theme-variants — A complete variant-based theming plugin.
• tailwindcss-multi-theme — A simple, yet good alternative if you want to stick to variants.
• tailwindcss-dark-mode - Another variant alternative.
• tailwindcss-darkmode - Another variant alternative.
• tailwindcss-theme-swapper - Similar to tailwindcss-theming, but lower-level, and without the variant functionality.
• Manually, by adding a screens media query in Tailwind's configuration.

A more complete comparison of the different theming plugins can be found here.