.eslintrc.json

{
  "root": true,
  "ignorePatterns": ["**/*"],
  "plugins": ["@nrwl/nx", "eslint-comments", "promise", "unicorn", "license-header"],
  "extends": [
    "plugin:@next/next/recommended",
    "airbnb",
    "airbnb/hooks",
    "plugin:eslint-comments/recommended",
    "plugin:promise/recommended",
    "plugin:unicorn/recommended",
    "prettier"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true
    }
  },
  "overrides": [
    {
      "files": ["*.ts", "*.tsx", "*.js", "*.jsx"],
      "rules": {
        "@nrwl/nx/enforce-module-boundaries": [
          "error",
          {
            "enforceBuildableLibDependency": true,
            "allow": [],
            "depConstraints": [
              {
                "sourceTag": "*",
                "onlyDependOnLibsWithTags": ["*"]
              }
            ]
          }
        ],
        "@next/next/no-html-link-for-pages": "off",
        // React is already in-scope for all files compiled with Next.js
        "react/react-in-jsx-scope": "off",
        // SSR does not support useLayoutEffect
        "no-restricted-imports": [
          "error",
          {
            "name": "react",
            "importNames": ["useLayoutEffect"],
            "message": "`useLayoutEffect` causes a warning in SSR. Use `useEffect`"
          }
        ],
        // Enables for of and for in loops since airbnb does not allow them
        "no-restricted-syntax": "off",
        // Enforces camelcase
        "camelcase": [
          "error",
          {
            "ignoreDestructuring": true
          }
        ],
        // Too restrictive, writing ugly code to defend against a very unlikely scenario: https://eslint.org/docs/rules/no-prototype-builtins
        "no-prototype-builtins": "off",
        // Does not allow unreachable loops unless its a for of loop
        "no-unreachable-loop": ["error", { "ignore": ["ForInStatement", "ForOfStatement"] }],
        // The default case may not be necessary when explicitly knowing return types
        "default-case": "warn",
        // Can make ugly code
        "consistent-return": "off",
        // Can make ugly code
        "no-case-declarations": "off",
        // Too restrictive: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/destructuring-assignment.md
        "react/destructuring-assignment": "off",
        // No jsx extension: https://github.com/facebook/create-react-app/issues/87#issuecomment-234627904
        "react/jsx-filename-extension": "off",
        // Allow only arrow function based components
        "react/function-component-definition": [2, { "namedComponents": "function-declaration" }],
        // Common practice in React
        "react/jsx-props-no-spreading": "off",
        // Warn when the index is used as a key instead of a unique value
        "react/no-array-index-key": "warn",
        // Sometimes its useful to return a useless fragment instead of adding a null as a union type
        "react/jsx-no-useless-fragment": "warn",
        // Common abbreviations are known and readable
        "unicorn/prevent-abbreviations": "off",
        // Airbnb prefers forEach
        "unicorn/no-array-for-each": "off",
        // React prefers capitalized file names for components
        "unicorn/filename-case": "off",
        // Enables Array.reduce()
        "unicorn/no-array-reduce": "off",
        // https://basarat.gitbooks.io/typescript/docs/tips/defaultIsBad.html
        "import/prefer-default-export": "off",
        // It's not accurate in the monorepo style
        "import/no-extraneous-dependencies": "off",
        // Import for import of components
        "import/no-cycle": "off",
        "eslint-comments/disable-enable-pair": "off",
        "promise/no-nesting": "off",
        "react/require-default-props": "off",
        "unicorn/no-abusive-eslint-disable": "off",
        "eslint-comments/no-unlimited-disable": "off",
        "unicorn/no-null": "off",
        "unicorn/prefer-module": "off",
        "license-header/header": [ "error", "./license-header.js" ],
        "unicorn/prefer-top-level-await": "off"
      }
    },
    {
      "files": ["*.ts", "*.tsx"],
      "plugins": ["@typescript-eslint", "typescript-enum"],
      "extends": [
        "plugin:@nrwl/nx/typescript",
        "airbnb-typescript",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking",
        // enums are bad https://www.youtube.com/watch?v=jjMbPt_H3RQ
        "plugin:typescript-enum/recommended"
      ],
      "parser": "@typescript-eslint/parser",
      "parserOptions": {
        "project": "./tsconfig.base.json",
        "ecmaVersion": 13,
        "sourceType": "module",
        "ecmaFeatures": {
          "jsx": true
        }
      },
      "rules": {
        // It's not accurate in the monorepo style
        "import/no-extraneous-dependencies": "off",
        // Required for react component imports
        "import/no-named-as-default": "off",
        // Requires return type
        "@typescript-eslint/explicit-function-return-type": "error",
        // Allows the use of functions before definition
        "@typescript-eslint/no-use-before-define": ["off"],
        // Allows variables starting with _ to be ignored if not used
        "@typescript-eslint/no-unused-vars": [
          "error",
          {
            "argsIgnorePattern": "^_"
          }
        ],
        // Disallows function overloading
        "@typescript-eslint/unified-signatures": "error",
        // Requires function return types
        "@typescript-eslint/prefer-function-type": "error",
        // Requires classes to make member access explicit
        "@typescript-eslint/explicit-member-accessibility": "error",
        // Requires the use of interface over type when possible
        "@typescript-eslint/consistent-type-definitions": "error",
        // Requires consistent type casting
        "@typescript-eslint/consistent-type-assertions": "error",
        // Requires the T[] type syntax for an array
        "@typescript-eslint/array-type": "error",
        // Next.js does not require all anchor tags to have an href
        "jsx-a11y/anchor-is-valid": "off",
        "@typescript-eslint/ban-ts-comment": "off",
        "react/no-unused-prop-types": "off",
        "no-case-declarations": "off",
        "no-underscore-dangle": "off",
        "@typescript-eslint/naming-convention": "warn"
      }
    },
    {
      "files": ["*.js", "*.jsx", "*.mjs"],
      "extends": ["plugin:@nrwl/nx/javascript"],
      "rules": {
        // Allow CJS until ESM support improves
        "unicorn/prefer-module": "off",
        "unicorn/import-style": "off",
        "no-param-reassign": "off",
        "import/extensions": "off"
      }
    },
    {
      "files": ["*.stories.jsx", "*.stories.tsx"],
      "rules": {
        "react/function-component-definition": "off",
        "@typescript-eslint/no-unsafe-assignment": "off",
        "@typescript-eslint/no-unsafe-member-access": "off"
      }
    },
    {
      "files": ["*.spec.js", "*.spec.ts", "*.spec.jsx", "*.spec.tsx"],
      "rules": {
        "@typescript-eslint/no-unsafe-call": "off"
      }
    }
  ]
}