eslint-plugin-node

Additional ESLint's rules for Node.js

💿 Install & Usage

$ npm install --save-dev eslint eslint-plugin-node

• Requires Node.js >=8.10.0
• Requires ESLint >=5.16.0

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

.eslintrc.json (An example)

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

Best Practices

Stylistic Issues

Deprecated rules

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

🔧 Configs

This plugin provides three configs:

• plugin:node/recommended condiders 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:node/recommended-module considers all files as ES Modules.
• plugin:node/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

• Q: The no-missing-import / no-missing-require rules don't work with nested folders in SublimeLinter-eslint
• A: See context.getFilename() in rule returns relative path in the SublimeLinter-eslint FAQ.

🚥 Semantic Versioning Policy

eslint-plugin-node 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

• GitHub Releases

❤️ 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.