1. Install Required Packages
First, ensure you have Node.js installed. Initialize your project using:
npm init -y
# OR
yarn init -y
Next, install the necessary packages:
npm install --save-dev husky lint-staged eslint prettier eslint-config-prettier eslint-plugin-prettier eslint-plugin-unused-imports @typescript-eslint/parser @typescript-eslint/eslint-plugin
# OR
yarn add --dev husky lint-staged eslint prettier eslint-config-prettier eslint-plugin-prettier eslint-plugin-unused-imports @typescript-eslint/parser @typescript-eslint/eslint-plugin
2. Setup husky
Use the husky init command to set up husky in your project:
npx husky init
This command creates a pre-commit script in .husky/ and updates the prepare script in package.json. You can later modify these scripts as per your workflow.
3. Setup pre-commit
Create a pre-commit script in .husky/pre-commit:
#!/usr/bin/env sh
. "$(dirname -- "$0")/_/husky.sh"
npx lint-staged
4. Setup ESLint
Create an .eslintrc.json file in your project's root directory with ESLint configurations:
{
"$schema": "https://json.schemastore.org/eslintrc.json",
"env": {
"browser": false,
"es2021": true,
"node": true
},
"extends": [
"plugin:react/recommended",
"plugin:prettier/recommended",
"plugin:react-hooks/recommended",
"plugin:jsx-a11y/recommended",
"eslint:recommended",
"plugin:prettier/recommended"
],
"plugins": [
"react",
"unused-imports",
"import",
"@typescript-eslint",
"jsx-a11y",
"prettier"
],
"parser": "@typescript-eslint/parser",
"parserOptions": {
"ecmaFeatures": {
"jsx": true
},
"ecmaVersion": 12,
"sourceType": "module"
},
"settings": {
"react": {
"version": "detect"
}
},
"rules": {
"no-console": "warn",
"react/prop-types": "off",
"react/jsx-uses-react": "off",
"react/react-in-jsx-scope": "off",
"react-hooks/exhaustive-deps": "off",
"jsx-a11y/click-events-have-key-events": "warn",
"jsx-a11y/interactive-supports-focus": "warn",
"prettier/prettier": "warn",
"no-unused-vars": "off",
"unused-imports/no-unused-vars": "off",
"unused-imports/no-unused-imports": "warn",
"object-curly-spacing": [
"error",
"never"
],
"@typescript-eslint/no-unused-vars": [
"warn",
{
"args": "after-used",
"ignoreRestSiblings": false,
"argsIgnorePattern": "^_.*?$"
}
],
"import/order": [
"warn",
{
"groups": [
"type",
"builtin",
"object",
"external",
"internal",
"parent",
"sibling",
"index"
],
"pathGroups": [
{
"pattern": "~/**",
"group": "external",
"position": "after"
}
],
"newlines-between": "always"
}
],
"react/self-closing-comp": "warn",
"react/jsx-sort-props": [
"warn",
{
"callbacksLast": true,
"shorthandFirst": true,
"noSortAlphabetically": false,
"reservedFirst": true
}
],
"padding-line-between-statements": [
"warn",
{
"blankLine": "always",
"prev": "*",
"next": "return"
},
{
"blankLine": "always",
"prev": [
"const",
"let",
"var"
],
"next": "*"
},
{
"blankLine": "any",
"prev": [
"const",
"let",
"var"
],
"next": [
"const",
"let",
"var"
]
}
]
}
}
5. Setup ESLint Ignore
Create an .eslintignore file to ignore specific files from ESLint:
.next/*
*.css
dist
esm/*
public/*
tests/*
scripts/*
*.config.js
node_modules
coverage
.next
build
6. Setup Prettier
Create a .prettierrc.json file with Prettier configurations:
{
"$schema": "https://json.schemastore.org/prettierrc.json",
"tabWidth": 2,
"printWidth": 100,
"semi": true,
"useTabs": false,
"singleQuote": false,
"bracketSpacing": false,
"endOfLine": "auto",
"arrowParens": "always",
"trailingComma": "all"
}
7. Setup Prettier Ignore
Create a .prettierignore file to ignore specific files from Prettier:
dist
node_modules
.next
build
scripts
8. Configure Husky and lint-staged
Update your package.json with Husky and lint-staged configurations:
"husky": {
"hooks": {
"pre-commit": "lint-staged"
}
},
"lint-staged": {
"*.{js,jsx,ts,tsx,json,css,scss,md}": [
"eslint --fix",
"prettier --write"
]
}
9. Add Scripts
Optionally, add scripts to your package.json for easier usage:
"scripts": {
"eslint": "eslint . --ext .js,.jsx,.ts,.tsx",
"format": "prettier --write ."
}
Now, you can run npm run eslint to check for linting errors and npm run format to format your code with Prettier. Before committing your code, Husky will automatically run lint-staged, fixing linting errors and formatting your code.
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