eslint-plugin-fp

eslint-plugin-fp

ESLint rules for functional programming

Install

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

Usage

Configure it in package.json.

{
  "name": "my-awesome-project",
  "eslintConfig": {
    "env": {
      "es6": true
    },
    "plugins": [
      "fp"
    ],
    "rules": {
      "fp/no-arguments": "error",
      "fp/no-class": "error",
      "fp/no-delete": "error",
      "fp/no-events": "error",
      "fp/no-get-set": "error",
      "fp/no-let": "error",
      "fp/no-loops": "error",
      "fp/no-mutating-assign": "error",
      "fp/no-mutating-methods": "error",
      "fp/no-mutation": "error",
      "fp/no-nil": "error",
      "fp/no-proxy": "error",
      "fp/no-rest-parameters": "error",
      "fp/no-this": "error",
      "fp/no-throw": "error",
      "fp/no-unused-expression": "error",
      "fp/no-valueof-field": "error",
      "no-var": "error"
    }
  }
}

Rules

• no-arguments - Forbid the use of arguments.
• no-class - Forbid the use of class.
• no-delete - Forbid the use of delete.
• no-events - Forbid the use of the events module.
• no-get-set - Forbid the use of getters and setters.
• no-let - Forbid the use of let.
• no-loops - Forbid the use of loops.
• no-mutating-assign - Forbid the use of Object.assign() with a variable as first argument.
• no-mutating-methods - Forbid the use of mutating methods.
• no-mutation - Forbid the use of mutating operators.
• no-nil - Forbid the use of null and undefined.
• no-proxy - Forbid the use of Proxy.
• no-rest-parameters - Forbid the use of rest parameters.
• no-this - Forbid the use of this.
• no-throw - Forbid the use of throw.
• no-unused-expression - Enforce that an expression gets used.
• no-valueof-field - Forbid the creation of valueOf fields.

Recommended configuration

This plugin exports a recommended configuration that enforces good practices.

To enable this configuration, use the extends property in your package.json.

{
  "name": "my-awesome-project",
  "eslintConfig": {
    "plugins": [
      "fp"
    ],
    "extends": "plugin:fp/recommended"
  }
}

See ESLint documentation for more information about extending configuration files.

MIT © Jeroen Engels

Changelog

[2.3.0] - 2017-01-01

Added

• Added allowUseStrict option to [no-unused-expression] to allow 'use strict'; statements.
• Use [eslint-ast-utils] to replace some logic.

Fixed

• Allow properties named arguments in [no-arguments].
• Allow function expressions in [no-mutating-assign].