rollup-plugin-tailwind-prefixer

Motivation

This plugin re-imagines how the config options to tailwind affect the final result.

Pros:

1. Write plain tailwind, but get the prefixes (mostly) for free.
2. Avoids the css selector is() (when you need to support older browsers)
3. Bonus: Ability to replace the @media (prefers-color-scheme: dark) with another css-selector.

Cons:

1. Not needed if your end-users already support the is() selector
2. Some boilerplate to setup the tw(...) function
3. My first rollup-plugin (code has unit tests)

[!TIP] Checkout the demo to see it in action

Setup

Add the plugin to your rollup or vite config

import { tailwindPrefixerPlugin } from "rollup-plugin-tailwind-prefixer";
tailwindPrefixerPlugin( {
  prefix: "my-prefix-",
  js: {
    functionName: "tw",
    /**
     * This will allow the prefixer code to be treeshaked away.
     */
    postPrefixFunctionName: "",
  },
  /**
   * Options for altering CSS files
   */
  css: {
    /**
     * Replaces the media query for the :dark utility (`@media (prefers-color-scheme: dark)`)
     * with a custom css class
     *
     * Example:
     * @media (prefers-color-scheme: dark) { .dark\:.text-white: color: white }
     * becomes
     * .dark-mode .dark\:text-white  { color: white }
     *
     * @note: Should this plugin be its own plugin?
     */
    darkModeReplacement: ".dark-mode",
  },
} );

In your code:

// tw.js
import { prefixer } from "rollup-plugin-tailwind-prefixer/prefixer";
export const tw = /*#__PURE__*/ prefixer.bind( undefined, "my-prefix-" );

// my-component.js
import { tw } from "./tw.js";

const prefixedClasses = tw( "flex p-1 m-1 sm:hover:p-4" );

// After the plugin in run...
const prefixedClasses =
  "my-prefix-flex my-prefix-p-1 my-prefix-m-1 my-prefix-sm:hover:p-4";

How it works

Your JS code is parsed for function names equal to config.functionName. When found, the function arguments are prefixed. (variables are skipped as we do not know what they contain)

Your css files are also prefixed, but all css classes are prefixed. Use the include/exclude options to control which files get prefixed