Registry / testing / eslint-plugin-math

eslint-plugin-math

library0.13.1jsnpmunverified

ESLint plugin for Math object and Number linting. Current version 0.13.1, peer dependency ESLint >=8.57.0, requires Node ^18 or >=20. Provides ~30 rules including prefer-math-trunc, prefer-math-pow, prefer-number-is-finite. Supports flat config (eslint.config.js) and legacy .eslintrc. Offers a recommended config and fixable suggestions. Built on eslint-type-tracer for efficient type detection. Designed to catch common Math/Number anti-patterns and promote modern alternatives. Notable for its focus on correctness (e.g., prefer-math-sum-precise for floating point).

testing

npm install eslint-plugin-math

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-MATH

eslint-plugin-math

testingjavascriptv0.13.1

Install

—

Import

—

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.

default

✓ import eslintPluginMath from 'eslint-plugin-math'

✗ const eslintPluginMath = require('eslint-plugin-math')

ESM-only; CommonJS require not supported. Use dynamic import if needed in CJS.

configs

✓ import { configs } from 'eslint-plugin-math'

✗ import eslintPluginMath from 'eslint-plugin-math'; const configs = eslintPluginMath.configs

Named export 'configs' is available since v0.10.0. Using default and destructuring is fine but redundant.

rules

✓ import { rules } from 'eslint-plugin-math'

✗ const { rules } = require('eslint-plugin-math')

Named export 'rules' is available since v0.10.0.

Shows how to use the plugin with flat config, including recommended config and custom rules.

import eslintPluginMath from 'eslint-plugin-math'; export default [ eslintPluginMath.configs.recommended, { rules: { 'math/prefer-math-trunc': 'error', 'math/no-static-infinity-calculations': 'warn', }, }, ];

Debug

Known issues

breakingPlugin no longer supports ESLint <8.57.0 as of v0.10.0.

fix

Upgrade ESLint to >=8.57.0 or pin plugin to <0.10.0.

affects: >=0.10.0

breakingPlugin no longer supports Node <18 as of v0.10.0.

fix

Upgrade Node to ^18 or >=20 or pin plugin to <0.10.0.

affects: >=0.10.0

breakingLegacy config 'plugin:math/recommended' renamed to 'plugin:math/recommended-legacy' in v0.10.0.

fix

Use 'plugin:math/recommended-legacy' in .eslintrc files. Flat config users should use eslintPluginMath.configs.recommended.

affects: >=0.10.0

gotchaFlat config import must be default import; named exports 'configs' and 'rules' are also available but require destructuring.

fix

Use `import eslintPluginMath from 'eslint-plugin-math'` or `import { configs } from 'eslint-plugin-math'`.

affects: >=0.10.0

deprecatedOption `reportBitwise` in rule 'prefer-math-trunc' was deprecated in v0.9.0.

fix

Remove the option; behavior is now default.

affects: >=0.9.0

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module /node_modules/eslint-plugin-math/dist/index.js from /project/eslint.config.js not supported.

Plugin is ESM-only and cannot be required via CommonJS.

fix

Use `import eslintPluginMath from 'eslint-plugin-math'` in an ESM context or use dynamic import.

ESLint couldn't find the plugin "eslint-plugin-math". (Note: plugins are not resolved relative to the config file.)

Plugin not installed or not in node_modules, or ESLint cannot resolve it.

fix

Run `npm install --save-dev eslint-plugin-math eslint` and ensure config references the plugin correctly.

Configuration for rule "math/prefer-math-trunc" is invalid: Value "off" is the only valid severity for deprecated rules.

Rule 'math/prefer-math-trunc' might be deprecated in future version.

fix

Check rule docs and use 'error' or 'warn' if still supported; or use 'off' to disable.

Upgrade

Version history

0.13.1latest on npm

Audit

Dependencies

eslintrequiredpeer dependency to run ESLint plugin

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/ota-meshi/eslint-plugin-math ↗

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

homepagehttps://ota-meshi.github.io/eslint-plugin-math/ ↗