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eslint-plugin-lodash-fp

library2.2.0-a1jsnpmunverified

An ESLint plugin providing rules specifically for lodash/fp, the functional programming variant of Lodash. The current stable version is 2.2.0-alpha1 (pre-release) and targets ESLint >=3. It helps enforce FP best practices such as currying, data-last argument order, and composition, and prevents usage of impure or chain-based patterns. It offers over 20 rules, including `use-fp` to enforce lodash/fp over lodash, `no-chain` to forbid `_.chain`, and `prefer-constant` to replace arrow functions returning literals. It distinguishes itself from general Lodash linting by focusing on the FP paradigm and catching subtle issues like extraneous arguments and unused results.

testing devops

github ↗package ↗

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

ESLint automatically resolves 'eslint-plugin-' prefix when specifying plugin name in .eslintrc.

plugins: ['lodash-fp']

The plugin assumes you are using lodash/fp, not lodash. Use 'lodash/fp' import to match rules like `use-fp`.

import _ from 'lodash/fp';

For CommonJS, require the fp submodule. The plugin's `use-fp` rule will flag require('lodash').

const _ = require('lodash/fp');

Basic setup and a rule violation example: shows installation, configuration in .eslintrc.json, and how no-chain catches _.chain usage.

// Install: npm install --save-dev eslint eslint-plugin-lodash-fp // .eslintrc.json { "plugins": ["lodash-fp"], "rules": { "lodash-fp/consistent-name": ["error", "_"], "lodash-fp/no-chain": "error", "lodash-fp/prefer-compact": "error", "lodash-fp/use-fp": "error" } } // Example code that triggers no-chain: // _.chain([1,2,3]).map(x => x * 2).value(); // ❌ Error: Unexpected _.chain // Correct FP: compose or use lodash/fp directly import _ from 'lodash/fp'; const result = _.map(x => x * 2, [1, 2, 3]); // ✅

Debug

Known footguns

deprecatedRule 'no-extraneous-function-wrapping' may produce false positives for complex expressions.

gotchaRules assume lodash/fp is imported. If you use both lodash and lodash/fp, some rules may misbehave.

deprecatedThe 'no-extraneous-partials' rule can be too restrictive and may flag valid currying patterns.

breakingVersion 2.0.0 changed some rule defaults: 'no-chain' became error by default.

Upgrade

Version history

Breaking-change detection hasn't run for this library yet.

Audit

Security & dependencies

CVE tracking and dependency tree are planned for a later release.

Agent activity

9 hits · last 30 days

gptbot

ahrefsbot

script

Resources

githubhttps://github.com/jfmengels/eslint-plugin-lodash-fp ↗

packagehttps://www.npmjs.com/package/eslint-plugin-lodash-fp ↗