Registry / testing / eslint-plugin-no-array-reduce

eslint-plugin-no-array-reduce

library1.0.62jsnpmunverified

ESLint plugin that bans the usage of Array.prototype.reduce() in favor of more readable array methods like map, filter, and group. Version 1.0.62 (latest), maintained with regular updates. It provides a single rule that flags all reduce() calls, with an option to allow reduce() via eslint-disable comments. Differentiator: enforces a stylistic preference against reduce() with no configuration needed, unlike general-purpose ESLint rules that require custom configuration.

testing

npm install eslint-plugin-no-array-reduce

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-NO-A

eslint-plugin-no-array-reduce

testingjavascriptv1.0.62

Install

—

Import

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Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

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.

plugin

✓ // In .eslintrc: { "plugins": ["no-array-reduce"] }

✗ const plugin = require('eslint-plugin-no-array-reduce')

The plugin is loaded via ESLint config, not imported directly in code.

recommended config

✓ // In .eslintrc: { "extends": ["plugin:no-array-reduce/recommended"] }

✗ // No common wrong import; ensure correct plugin name in 'extends'.

Use the recommended config to enable the rule. You can also manually configure the rule under 'rules'.

rule itself

✓ // In .eslintrc: { "rules": { "no-array-reduce/no-reduce": "error" } }

✗ // Using rule name without prefix: { "rules": { "no-reduce": "error" } }

The rule is namespaced under the plugin prefix 'no-array-reduce/' to avoid conflicts.

Shows installation, ESLint configuration, a failing use of reduce(), and how to disable the rule inline.

// Install the plugin npm install --save-dev eslint-plugin-no-array-reduce // Add to .eslintrc.json: { "plugins": ["no-array-reduce"], "extends": ["plugin:no-array-reduce/recommended"] } // Example file that will fail linting: const arr = [1, 2, 3]; const sum = arr.reduce((acc, x) => acc + x, 0); // Example file that passes: const sum = arr.reduce((acc, x) => acc + x, 0); // eslint-disable-line no-array-reduce/no-reduce

Debug

Known issues

gotchaThe rule only flags Array.prototype.reduce() calls, not other reduce-like methods (e.g., Array.prototype.reduceRight()).

fix

If you want to disallow reduceRight(), you need a separate rule or manual linting.

affects: >=1.0.0

gotchaThe rule triggers on any .reduce() call, including those from polyfills or custom objects that happen to have a reduce method. It does not check the receiver type.

fix

Use eslint-disable comments to suppress false positives on non-Array objects.

affects: >=1.0.0

deprecatedThere are no known breaking changes as the plugin is stable and v1.x only. Always upgrade to latest patch for TypeScript compatibility fixes.

fix

Run npm update eslint-plugin-no-array-reduce regularly.

affects: >=1.0.0

Errors

Common errors & fixes

ESLint: Failed to load plugin 'no-array-reduce': Cannot find module 'eslint-plugin-no-array-reduce'

The plugin is not installed or not in node_modules.

fix

Run npm install --save-dev eslint-plugin-no-array-reduce

ESLint: Configuration for rule 'no-reduce' is invalid. Rule 'no-reduce' not found.

Using the rule name without the plugin prefix.

fix

Use 'no-array-reduce/no-reduce' as the rule name.

TypeError: Cannot read property 'some' of undefined (when using TypeScript parser)

The plugin expects ESLint >=7.0.0 and may have issues with older versions or custom parsers.

fix

Ensure ESLint version is 7.0.0 or higher.

Upgrade

Version history

1.0.62latest on npm

Audit

Dependencies

eslintrequiredPeer dependency required to load the plugin. Must be >=7.0.0.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/mkosir/eslint-plugin-no-array-reduce ↗

packagehttps://www.npmjs.com/package/eslint-plugin-no-array-reduce ↗