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# ESLint Configuration

[Website](https://eslint.org) |
[Configure ESLint](https://eslint.org/docs/latest/use/configure) |
[Rules](https://eslint.org/docs/rules/) |
[Contribute to ESLint](https://eslint.org/docs/latest/contribute) |
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Contains the ESLint configuration used for projects maintained by the ESLint team.

## Installation

You can install ESLint using npm or other package managers:

```shell
npm install eslint -D
# or
yarn add eslint -D
# or
pnpm install eslint -D
# or
bun add eslint -D
```

Then install this configuration:

```shell
npm install eslint-config-eslint -D
# or
yarn add eslint-config-eslint -D
# or
pnpm install eslint-config-eslint -D
# or
bun add eslint-config-eslint -D
```

## Usage

### ESM (`"type":"module"`) projects

In your `eslint.config.js` file, add:

```js
import { defineConfig } from "eslint/config";
import eslintConfigESLint from "eslint-config-eslint";

export default defineConfig([eslintConfigESLint]);
```

**Note**: This configuration array contains configuration objects with the `files` property.

- `files: ["**/*.js"]`: ESM-specific configurations.
- `files: ["**/*.cjs"]`: CommonJS-specific configurations.

### CommonJS projects

In your `eslint.config.js` file, add:

```js
const { defineConfig } = require("eslint/config");
const eslintConfigESLintCJS = require("eslint-config-eslint/cjs");

module.exports = defineConfig([eslintConfigESLintCJS]);
```

### Base config

Note that the above configurations are intended for files that will run in Node.js. For files that will not run in Node.js, you should use the `base` config.

Here's an example of an `eslint.config.js` file for a website project with scripts that run in browser and CommonJS configuration files and tools that run in Node.js:

```js
const { defineConfig } = require("eslint/config");
const eslintConfigESLintBase = require("eslint-config-eslint/base");
const eslintConfigESLintCJS = require("eslint-config-eslint/cjs");

module.exports = defineConfig([
	{
		files: ["scripts/*.js"],
		extends: [eslintConfigESLintBase],
	},
	{
		files: ["eslint.config.js", ".eleventy.js", "tools/*.js"],
		extends: [eslintConfigESLintCJS],
	},
]);
```

### Formatting config

Note that none of the above configurations includes formatting rules. If you want to enable formatting rules, add the formatting config.

```js
import { defineConfig } from "eslint/config";
import eslintConfigESLint from "eslint-config-eslint";
import eslintConfigESLintFormatting from "eslint-config-eslint/formatting";

export default defineConfig([eslintConfigESLint, eslintConfigESLintFormatting]);
```

### Where to ask for help?

Open a [discussion](https://github.com/eslint/eslint/discussions) or stop by our [Discord server](https://eslint.org/chat) instead of filing an issue.