.eslintrc.json

{
  // Configuration for JavaScript files
  "extends": [
    "airbnb-base",
    "next/core-web-vitals",
    // Needed to avoid warning in next.js build: 'The Next.js plugin was not detected in your ESLint configuration'
    "plugin:prettier/recommended"
  ],
  "rules": {
    "prettier/prettier": [
      "error",
      {
        "singleQuote": true,
        "endOfLine": "auto"
      }
    ]
    // Avoid conflict rule between Prettier and Airbnb Eslint
  },
  "overrides": [
    // Configuration for TypeScript files
    {
      "files": [
        "**/*.ts",
        "**/*.tsx"
      ],
      "plugins": [
        "@typescript-eslint",
        "unused-imports",
        "tailwindcss",
        "simple-import-sort"
      ],
      "extends": [
        "plugin:tailwindcss/recommended",
        "airbnb",
        "airbnb-typescript",
        "next/core-web-vitals",
        "plugin:prettier/recommended"
      ],
      "parserOptions": {
        "project": "./tsconfig.json"
      },
      "rules": {
        "prettier/prettier": "warn",
        // Avoid conflict rule between Prettier and Airbnb Eslint
        "import/extensions": "off",
        // Avoid missing file extension errors, TypeScript already provides a similar feature
        "react/function-component-definition": "off",
        // Disable Airbnb's specific function type
        "react/destructuring-assignment": "off",
        // Vscode doesn't support automatically destructuring, it's a pain to add a new variable
        "react/require-default-props": "off",
        // Allow non-defined react props as undefined
        "react/jsx-props-no-spreading": "off",
        "no-underscore-dangle": "off",
        //        "react/button-has-type": "off",
        "import/no-extraneous-dependencies": [
          "error",
          {
            "devDependencies": true,
            "optionalDependencies": false,
            "peerDependencies": false
          }
        ],
        // _app.tsx uses spread operator and also, react-hook-form
        "@typescript-eslint/comma-dangle": "off",
        // Avoid conflict rule between Eslint and Prettier
        "@typescript-eslint/consistent-type-imports": "error",
        // Ensure `import type` is used when it's necessary
        "no-restricted-syntax": [
          "error",
          "ForInStatement",
          "LabeledStatement",
          "WithStatement"
        ],
        // Overrides Airbnb configuration and enable no-restricted-syntax
        "import/prefer-default-export": "off",
        // Named export is easier to refactor automatically
        "simple-import-sort/imports": "error",
        // Import configuration for `eslint-plugin-simple-import-sort`
        "simple-import-sort/exports": "error",
        // Export configuration for `eslint-plugin-simple-import-sort`
        "import/order": "off",
        // Avoid conflict rule between `eslint-plugin-import` and `eslint-plugin-simple-import-sort`
        "@typescript-eslint/no-unused-vars": "off",
        "unused-imports/no-unused-imports": "error",
        "unused-imports/no-unused-vars": [
          "error",
          {
            "argsIgnorePattern": "^_"
          }
        ]
      }
    },
    // Configuration for testing
    {
      "files": [
        "**/*.test.ts",
        "**/*.test.tsx"
      ],
      "plugins": [
        "jest",
        "jest-formatting",
        "testing-library",
        "jest-dom"
      ],
      "extends": [
        "plugin:jest/recommended",
        "plugin:jest-formatting/recommended",
        "plugin:testing-library/react",
        "plugin:jest-dom/recommended",
        "plugin:react/jsx-runtime",
        "next/core-web-vitals"
      ]
    },
    // Configuration for e2e testing (Playwright)
    {
      "files": [
        "**/*.spec.ts"
      ],
      "extends": [
        "plugin:playwright/recommended"
      ]
    }
  ]
}