Neurotic Pumpkin Murderer


    15.3.0 • Public • Published


    forked from eslint-plugin-node v11.1.0. as the original repository seems no longer maintained.

    npm version Downloads/month Build Status Coverage Status Dependency Status

    Additional ESLint's rules for Node.js

    💿 Install & Usage

    $ npm install --save-dev eslint eslint-plugin-n
    • Requires Node.js >=12.22.0
    • Requires ESLint >=7.0.0

    Note: It recommends a use of the "engines" field of package.json. The "engines" field is used by n/no-unsupported-features/* rules.

    .eslintrc.json (An example)

        "extends": ["eslint:recommended", "plugin:n/recommended"],
        "parserOptions": {
            // Only ESLint 6.2.0 and later support ES2020.
            "ecmaVersion": 2020
        "rules": {
            "n/exports-style": ["error", "module.exports"],
            "n/file-extension-in-import": ["error", "always"],
            "n/prefer-global/buffer": ["error", "always"],
            "n/prefer-global/console": ["error", "always"],
            "n/prefer-global/process": ["error", "always"],
            "n/prefer-global/url-search-params": ["error", "always"],
            "n/prefer-global/url": ["error", "always"],
            "n/prefer-promises/dns": "error",
            "n/prefer-promises/fs": "error"

    package.json (An example)

        "name": "your-module",
        "version": "1.0.0",
        "type": "commonjs",
        "engines": {
            "node": ">=8.10.0"

    📖 Rules

    • ⭐️ - the mark of recommended rules.
    • ✒️ - the mark of fixable rules.

    Possible Errors

    Rule ID Description
    n/handle-callback-err require error handling in callbacks
    n/no-callback-literal ensure Node.js-style error-first callback pattern is followed
    n/no-exports-assign disallow the assignment to exports ⭐️
    n/no-extraneous-import disallow import declarations which import extraneous modules ⭐️
    n/no-extraneous-require disallow require() expressions which import extraneous modules ⭐️
    n/no-missing-import disallow import declarations which import non-existence modules ⭐️
    n/no-missing-require disallow require() expressions which import non-existence modules ⭐️
    n/no-new-require disallow new operators with calls to require
    n/no-path-concat disallow string concatenation with __dirname and __filename
    n/no-process-exit disallow the use of process.exit()
    n/no-unpublished-bin disallow bin files that npm ignores ⭐️
    n/no-unpublished-import disallow import declarations which import private modules ⭐️
    n/no-unpublished-require disallow require() expressions which import private modules ⭐️
    n/no-unsupported-features/es-builtins disallow unsupported ECMAScript built-ins on the specified version ⭐️
    n/no-unsupported-features/es-syntax disallow unsupported ECMAScript syntax on the specified version ⭐️
    n/no-unsupported-features/node-builtins disallow unsupported Node.js built-in APIs on the specified version ⭐️
    n/process-exit-as-throw make process.exit() expressions the same code path as throw ⭐️
    n/shebang suggest correct usage of shebang ⭐️✒️

    Best Practices

    Rule ID Description
    n/no-deprecated-api disallow deprecated APIs ⭐️

    Stylistic Issues

    Rule ID Description
    n/callback-return require return statements after callbacks
    n/exports-style enforce either module.exports or exports ✒️
    n/file-extension-in-import enforce the style of file extensions in import declarations ✒️
    n/global-require require require() calls to be placed at top-level module scope
    n/no-mixed-requires disallow require calls to be mixed with regular variable declarations
    n/no-process-env disallow the use of process.env
    n/no-restricted-import disallow specified modules when loaded by import declarations
    n/no-restricted-require disallow specified modules when loaded by require
    n/no-sync disallow synchronous methods
    n/prefer-global/buffer enforce either Buffer or require("buffer").Buffer
    n/prefer-global/console enforce either console or require("console")
    n/prefer-global/process enforce either process or require("process")
    n/prefer-global/text-decoder enforce either TextDecoder or require("util").TextDecoder
    n/prefer-global/text-encoder enforce either TextEncoder or require("util").TextEncoder
    n/prefer-global/url-search-params enforce either URLSearchParams or require("url").URLSearchParams
    n/prefer-global/url enforce either URL or require("url").URL
    n/prefer-promises/dns enforce require("dns").promises
    n/prefer-promises/fs enforce require("fs").promises

    Deprecated rules

    These rules have been deprecated in accordance with the deprecation policy, and replaced by newer rules:

    Rule ID Replaced by
    n/no-hide-core-modules (nothing)
    n/no-unsupported-features n/no-unsupported-features/es-syntax and n/no-unsupported-features/es-builtins

    🔧 Configs

    This plugin provides three configs:

    • plugin:n/recommended considers both CommonJS and ES Modules. If "type":"module" field existed in package.json then it considers files as ES Modules. Otherwise it considers files as CommonJS. In addition, it considers *.mjs files as ES Modules and *.cjs files as CommonJS.
    • plugin:n/recommended-module considers all files as ES Modules.
    • plugin:n/recommended-script considers all files as CommonJS.

    Those preset config:

    • enable no-process-exit rule because the official document does not recommend a use of process.exit().
    • enable plugin rules which are given in the above table.
    • add {ecmaVersion: 2019} and etc into parserOptions.
    • add proper globals into globals.
    • add this plugin into plugins.

    👫 FAQ

    🚥 Semantic Versioning Policy

    eslint-plugin-n follows semantic versioning and ESLint's Semantic Versioning Policy.

    • Patch release (intended to not break your lint build)
      • A bug fix in a rule that results in it reporting fewer errors.
      • Improvements to documentation.
      • Non-user-facing changes such as refactoring code, adding, deleting, or modifying tests, and increasing test coverage.
      • Re-releasing after a failed release (i.e., publishing a release that doesn't work for anyone).
    • Minor release (might break your lint build)
      • A bug fix in a rule that results in it reporting more errors.
      • A new rule is created.
      • A new option to an existing rule is created.
      • An existing rule is deprecated.
    • Major release (likely to break your lint build)
      • A support for old Node version is dropped.
      • A support for old ESLint version is dropped.
      • An existing rule is changed in it reporting more errors.
      • An existing rule is removed.
      • An existing option of a rule is removed.
      • An existing config is updated.

    📰 Changelog

    ❤️ Contributing

    Welcome contributing!

    Please use GitHub's Issues/PRs.

    Development Tools

    • npm test runs tests and measures coverage.
    • npm run coverage shows the coverage result of npm test command.
    • npm run clean removes the coverage result of npm test command.


    npm i eslint-plugin-n

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