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Version: 3.0

Installation

Depending on the ESLint version used in your project, you can choose:

However, since ESLint v8 and below are now deprecated, upgrading to v9 is recommended for ongoing support and improvements.

note

In case you are upgrading to eslint v9 or above , please check the migration guide.

If you are using eslint v8 and are migrating from v2, please check this guide.

You'll first need to install ESLint. If you project is a monorepo, consider creating a separate eslint-config for each package.

Please do refer the official docs to install eslint if needed.

Eslint 9 and above​

npm i eslint --save-dev
yarn add -D eslint
pnpm add -D eslint

Next, install @nish1896/eslint-flat-config.

npm install @nish1896/eslint-flat-config  --save-dev
yarn add -D @nish1896/eslint-flat-config
pnpm add -D @nish1896/eslint-flat-config

Eslint 8​

We will be installing v8.57.1 which was the last major version prior to the release of version 9.

npm i eslint@8.57.1 --save-dev
yarn add -D eslint@8.57.1
pnpm add -D eslint@8.57.1

Next, install @nish1896/eslint-config.

npm install @nish1896/eslint-config  --save-dev
yarn add -D @nish1896/eslint-config
pnpm add -D @nish1896/eslint-config

Setup​

Paste the following scripts in your package.json file

"lint": "eslint",
"lint:fix": "eslint --fix"

The first script will check for lint warnings in your code while the second script will format code as per the rules specified in the eslint configuration of your application. The remaining warnings or errors need to be manually fixed by the developer.

tip

You can also add "lint" command to your package.json file through command line.

npm pkg set scripts.lint="eslint --fix ."

After that, you can run ESLint on any file or directory like this:

npx eslint yourfile.js
yarn eslint yourfile.jsx
pnpm eslint yourfile.tsx

This config extends the following plugins -