Registry / testing / eslint-plugin-fsecond

eslint-plugin-fsecond

library1.5.0jsnpmunverified

ESLint plugin providing opinionated rules for JavaScript, TypeScript, and React projects. Current stable version is 1.5.0 (February 2026). Requires Node.js >=22 and ESLint >=9.0.0. Supports TypeScript via peer dependency typescript >=5.0.0. Key differentiators: includes rules like no-inline-interfaces (auto-fixable), prefer-destructured-optionals, valid-event-listener, and no-redundant-jsx-prop-usage (requires type information). Offers recommended and recommendedTypeChecked configs. Actively maintained with regular releases.

testing

npm install eslint-plugin-fsecond

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-FSEC

eslint-plugin-fsecond

testingjavascriptv1.5.0

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.

fsecond

✓ import fsecond from 'eslint-plugin-fsecond'

✗ const fsecond = require('eslint-plugin-fsecond')

Default import of the plugin object. ESM-only as the package does not export a CommonJS entry point.

fsecond.configs.recommended

✓ import fsecond from 'eslint-plugin-fsecond'; export default [...fsecond.configs.recommended]

✗ import { configs } from 'eslint-plugin-fsecond'

Accessing configs via named import may fail because the default export is the plugin object with a configs property.

no-inline-interfaces

✓ import fsecond from 'eslint-plugin-fsecond'; ... rules: { 'fsecond/no-inline-interfaces': 'error' }

✗ import { rules } from 'eslint-plugin-fsecond'

Rules are accessed via the plugin prefix in ESLint configs, not by importing individual rule objects.

Shows how to use the recommended config and override a rule with options.

// eslint.config.ts import fsecond from 'eslint-plugin-fsecond'; export default [ ...fsecond.configs.recommended, { rules: { 'fsecond/no-inline-interfaces': ['error', { allowObjectTypes: false }], }, }, ];

Debug

Known issues

breakingNode.js >=22 required; older Node versions are not supported.

fix

Upgrade Node.js to version 22 or higher.

affects: >=1.0.0

breakingESLint >=9.0.0 required; flat config only (no .eslintrc).

fix

Migrate to ESLint flat config (eslint.config.js/ts) and upgrade ESLint to 9+.

affects: >=1.0.0

deprecatedThe rule 'valid-event-listener' has an option 'checkWindowListener' that was deprecated in v1.1.0; use 'checkGlobalListeners' instead.

fix

Replace 'checkWindowListener' with 'checkGlobalListeners' in rule options.

affects: >=1.1.0

gotchaDefault import is ESM-only; require() will throw an error.

fix

Use import statements or dynamic import().

affects: >=1.0.0

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module ...

Package is ESM-only; using require() in a CommonJS file.

fix

Switch to import syntax or use dynamic import: const fsecond = await import('eslint-plugin-fsecond');

ESLint couldn't find the plugin "eslint-plugin-fsecond". Are you sure it's installed?

ESLint plugin not installed or not in node_modules.

fix

Run: pnpm add -D eslint-plugin-fsecond

Upgrade

Version history

1.5.0latest on npm

Audit

Dependencies

eslintrequiredpeer dependency: ESLint >=9.0.0 required for plugin to work

typescriptoptionaloptional peer dependency for TypeScript rules (>=5.0.0)

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/AndreaPontrandolfo/eslint-plugin-fsecond ↗

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