Rules enforcing best practices and consistency using Tailwind CSS.

While you can use the official plugin prettier-plugin-tailwindcss for ordering your classnames...

eslint-plugin-tailwindcss offers more than 5 other rules, that you can benefit from on top of prettier-plugin-tailwindcss. Sounds good ? Keep reading 👇

Learn more about each supported rules by reading their documentation:

• classnames-order: order classnames by target properties then by variants ([size:][theme:][state:])
• enforces-negative-arbitrary-values: make sure to use negative arbitrary values classname without the negative classname e.g. -top-[5px] should become top-[-5px]
• enforces-shorthand: merge multiple classnames into shorthand if possible e.g. mx-5 my-5 should become m-5
• migration-from-tailwind-2 for easy upgrade from Tailwind CSS v2 to v3. Warning: at the moment you should temporary turn off the no-custom-classname rule if you want to see the warning from migration-from-tailwind-2
• no-arbitrary-value: forbid using arbitrary values in classnames (turned off by default)
• no-custom-classname: only allow classnames from Tailwind CSS and the values from the whitelist option
• no-contradicting-classname: e.g. avoid p-2 p-3, different Tailwind CSS classnames (pt-2 & pt-3) but targeting the same property several times for the same variant.

Using ESLint extension for Visual Studio Code, you will get these messages

You can can the same information on your favorite command line software as well.

Premium Sponsors Support us by becoming a sponsor. Become a recurring sponsor
Current Sponsors Any amount is appreciated.
Past sponsors Even if this is just a one-time thing Become a backer
Contributors This project can evolve thanks to all the people who contribute. You are welcome to contribute to this project by reporting issues, feature requests or even opening Pull Requests.

If you enjoy my work you can:

• Share the plugin on Twitter
• Contribute to the project by:
  • Giving feedback
  • Creating an issue
  • Make a pull request
  • Write a feature request
• Give back and sponsor its development

• feat: Lint values in a object
• feat: Support for Object syntax in custom callees beside classnames(by dipsaus9 🙏)
• feat: New option skipClassAttribute you can turn on to only lint the callees
• FIX: support for Tailwind CSS version 3.2.3

View all releases on github

You'll first need to install ESLint:

$ npm i -D eslint

Next, install the latest version of eslint-plugin-tailwindcss if you are using Tailwind CSS v3

$ npm i -D tailwindcss eslint-plugin-tailwindcss

Still using Tailwind CSS v2?

👉 Install the latest version compatible with Tailwind CSS v2 via npm i -D eslint-plugin-tailwindcss@tw2

Please note that new rules might not be available in the tw2 distribution

Add tailwindcss to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

{
  "plugins": ["tailwindcss"]
}

Use our preset to get reasonable defaults:

  "extends": [
    "plugin:tailwindcss/recommended"
  ]

If you do not use a preset you will need to specify individual rules and add extra configuration:

Configure the rules you want to use under the rules section.

The following lines are matching the configuration saved in the recommended preset...

{
  "rules": {
    "tailwindcss/classnames-order": "warn",
    "tailwindcss/enforces-negative-arbitrary-values": "warn",
    "tailwindcss/enforces-shorthand": "warn",
    "tailwindcss/migration-from-tailwind-2": "warn",
    "tailwindcss/no-arbitrary-value": "off",
    "tailwindcss/no-custom-classname": "warn",
    "tailwindcss/no-contradicting-classname": "error"
  }
}

Learn more about Configuring Rules in ESLint.

Most rules shares the same settings, instead of duplicating some options...

You should also specify settings that will be shared across all the plugin rules. More about eslint shared settings.

All these settings have nice default values that are explained in each rules' documentation. I'm listing them in the code below just to show them.

{
  settings: {
    tailwindcss: {
      // These are the default values but feel free to customize
      callees: ["classnames", "clsx", "ctl"],
      config: "tailwind.config.js",
      cssFiles: [
        "**/*.css",
        "!**/node_modules",
        "!**/.*",
        "!**/dist",
        "!**/build",
      ],
      cssFilesRefreshRate: 5_000,
      removeDuplicates: true,
      skipClassAttribute: false,
      whitelist: [],
      tags: [],
      classRegex: "^class(Name)?$", // can be modified to support custom attributes. E.g. "^tw$" for `twin.macro`
    },
  },
}

The plugin will look for each setting value in this order and stop looking as soon as it finds the settings:

1. In the rule option argument (rule level)
2. In the shared settings (plugin level)
3. Default value of the requested setting (plugin level)...

• validate-modifiers: I don't know if possible, but I'd like to make sure all the modifiers prefixes of a classname are valid e.g. yolo:bg-red should throw an error...

• no-redundant-variant: e.g. avoid mx-5 sm:mx-5, no need to redefine mx in sm: variant as it uses the same value (5)

• only-valid-arbitrary-values:

  • e.g. avoid top-[42], only 0 value can be unitless.
  • e.g. avoid text-[rgba(10%,20%,30,50%)], can't mix % and 0-255.

I wrote this plugin after searching for existing tools which perform the same task but didn't satisfied my needs:

• prettier-plugin-tailwindcss, the official plugin, only takes care of ordering classnames, do not support array of classnames, do not support blade
• eslint-plugin-tailwind, not bad but no support (yet) for variants sorting
• Headwind, only works within Visual Studio Code