eslint-plugin-tailwindcss

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 👇

Supported Rules

Learn more about each supported rules by reading their documentation:

classnames-order: order classnames for consistency and it makes merge conflict a bit easier to resolve
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.

🤝 Support `eslint-plugin-tailwindcss`

🥰 How you can support us?	💪 They did it!
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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.
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Latest changelog

feat: support tailwind config in typescript (by quesabe 🙏) You may have to upgrade your Tailwind CSS version to 3.3.2
feat: add ignoredKeys in settings used for cva or similar
fix: callees with dot
fix: no-custom-classname doesn't work with hyphenated group names
fix: default settings conflict
fix: classRegex ignored in vuejs
chore: fix dependency vulnerability (mocha)
feat: support named group/peer syntax (by hampustagerud 🙏)
feat: add support for Vue v-bind:class
docs: recommended parsers
revert: removing default parsers from recommended preset and dependencies
fix: using vue-eslint-parser as default parser for *.vue files
fix: default parsers in the recommended preset
fix: move tailwindcss to peerDependencies (by xeho91 🙏)
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

Screencasts on our YouTube Channel

	ESLint plugin Tailwind CSS youtube.com/@eslint-plugin-tailwindcss

Installation

1. Install `eslint`

You'll first need to install ESLint:

$ npm i -D eslint

Then, create you .eslintrc.js file

module.exports = {
  root: true,
};

2. Install `eslint-plugin-tailwindcss`

$ npm i -D eslint-plugin-tailwindcss

Edit your .eslintrc file to use our recommended preset to get reasonable defaults:

module.exports = {
  root: true,
  extends: ["plugin:tailwindcss/recommended"],
};

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

Learn more about Configuring Rules in ESLint.

3. Configure ESLint parsers

Depending on the languages you are using in your project you must tell which parser will analyze your source files.

Our recommendations:

For js[x], react, ts[x]:

Install the parser: npm i -D @typescript-eslint/parser

Assign it to your files in eslintrc:

overrides: [
  {
    files: ['*.ts', '*.tsx', '*.js'],
    parser: '@typescript-eslint/parser',
  },
],

For vue.js:

Install the parser: npm i -D vue-eslint-parser

Assign it to your files in eslintrc:

overrides: [
  {
    files: ['*.vue'],
    parser: 'vue-eslint-parser',
  },
],

For HTML and similar:

Install the parser: npm i -D @angular-eslint/template-parser

Assign it to your files in eslintrc:

overrides: [
  {
    files: ['*.html', '*.blade.php'],
    parser: '@angular-eslint/template-parser',
  },
],

We removed the default parsers which were added to v3.8.2 because it created negative impact on dependencies resolution, bundle size increase and possible conflicts with existing configurations.

4. Add a npm script

In your package.json add one or more script(s) to run eslint targeting your source files:

"scripts": {
  "lint": "eslint ./src",
  "lint:debug": "eslint ./src --debug",
  "lint:fix": "eslint ./src --fix"
},

5. Run the linting task

npm run lint can do the job on demand but you can also get live feedback using VS Code ESLint extension, just make sure you restart VS Code as it can be required for the plugin to work as expected.

More settings

The rules accept settings meant to fit your own choices, make sure to read the documentation of each rule.

Optional shared settings

Most rules share the same settings, instead of duplicating the options all over the place...

You should define the shared settings that will be shared across all the plugin rules.

All these settings already have nice default values that are explained in the documentation.

FYI, here are the default values:

{
  settings: {
    tailwindcss: {
      // These are the default values but feel free to customize
      callees: ["classnames", "clsx", "ctl"],
      config: "tailwind.config.js", // returned from `loadConfig()` utility if not provided
      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 in this order and stops searching as soon as it finds the settings:

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

Upcoming Rules

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.

License

uhyo/eslint-plugin-tailwindcss

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