eslint-plugin-prettier

Runs prettier as an eslint rule

Installation

You'll first need to install ESLint:

$ npm install eslint --save-dev

Next, install eslint-plugin-prettier:

$ npm install eslint-plugin-prettier --save-dev

Finally, install prettier:

$ npm install prettier --save-dev

Note: If you installed ESLint globally (using the -g flag) then you must also install eslint-plugin-prettier globally.

Usage

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

{
    "plugins": [
        "prettier"
    ]
}

Then configure the prettier rule under the rules section:

{
    "rules": {
        "prettier/prettier": "error"
    }
}

You can also pass prettier configuration as an option:

{
    "rules": {
        "prettier/prettier": ["error", {"trailingComma": true, "singleQuote": true}]
    }
}

The rule will report an error if your code does not match prettier style. The rule is autofixable -- if you run eslint with the --fix flag, your code will be formatted according to prettier style.

This plugin works best if you disable all other ESLint rules relating to code formatting, and only enable rules that detect patterns in the AST. (If another active ESLint rule disagrees with prettier about how code should be formatted, it will be impossible to avoid lint errors.) If your desired formatting does not match the prettier output (e.g. if you don't want semicolons), you should use a different tool such as prettier-eslint instead.

Migrating to 2.0.0

Starting in 2.0.0, prettier is a peerDependency of this module, rather than a dependency. This means that you can use any version of prettier with this plugin, but it also means that you need to install it separately and include it as a devDependency in your project.

To install prettier, use:

npm install prettier --save-dev