Registry / testing / eslint-config-cheminfo

eslint-config-cheminfo

library18.0.0jsnpmunverified

Shared ESLint configuration for cheminfo and ml.js projects. Current stable version is 18.0.0, released April 2026. It requires ESLint ^9.39.1 and uses the flat config format only. The config bundles rules from eslint-plugin-jsdoc, eslint-plugin-unicorn, and eslint-plugin-vitest into multiple sub-configs: base, jsdoc, unicorn, and vitest. The default export combines them all. Breaking changes in recent major versions include enabling new unicorn rules, adding import order and type-only checks, and updating ESLint and plugin peer dependencies. Unlike generic ESLint configs, this is tightly scoped to the cheminfo ecosystem with opinionated rules for chemistry and machine learning JavaScript libraries.

testing

npm install eslint-config-cheminfo

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-CONFIG-CHEM

eslint-config-cheminfo

testingjavascriptv18.0.0

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.

default

✓ import cheminfo from 'eslint-config-cheminfo'

✗ const cheminfo = require('eslint-config-cheminfo')

ESM-only since v15 (flat config). CJS require() will fail.

base (named export from subpath)

✓ import base from 'eslint-config-cheminfo/base'

✗ import { base } from 'eslint-config-cheminfo'

Subpath exports are default exports, not named exports. Use the full path to the sub-config file.

vitest (named export from subpath)

✓ import vitest from 'eslint-config-cheminfo/vitest'

✗ import { vitest } from 'eslint-config-cheminfo/vitest'

Same as base: subpath configs are default exports, not named.

Shows how to use the default config with flat config format and defineConfig helper. Requires ESLint ^9.39.1.

import { defineConfig } from 'eslint/config'; import cheminfo from 'eslint-config-cheminfo'; export default defineConfig(cheminfo); // package.json scripts: // "eslint": "eslint src", // "eslint-fix": "npm run eslint -- --fix"

Debug

Known issues

breakingv17.0.0: Updated ESLint peer dependency to ^9.39.1 and plugins. Old v16 configs are incompatible with ESLint <9.39.1.

fix

Update ESLint to ^9.39.1 and migrate to flat config if not already done. See MIGRATION.md.

affects: <17.0.0

breakingv15.0.0: Added Vitest plugin and strict config, enforced import order, and switched to ESM-only. The config is now flat config only.

fix

Migrate from .eslintrc to eslint.config.mjs. Use default import instead of require().

affects: <15.0.0

breakingv18.0.0: Enabled two new unicorn rules. Projects may see new lint errors if code violates these rules.

fix

Review the newly enabled unicorn rules in CHANGELOG and fix or disable them as needed.

affects: >=18.0.0

deprecatedThe .eslintrc format is deprecated since v15. Flat config only.

fix

Use eslint.config.mjs with the default export from 'eslint-config-cheminfo'.

affects: >=15.0.0

gotchaThe default export from 'eslint-config-cheminfo' combines all sub-configs (base, jsdoc, unicorn, vitest). If you only want base, import from 'eslint-config-cheminfo/base'.

fix

Use subpath imports: import base from 'eslint-config-cheminfo/base'.

affects: >=15.0.0

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module /path/to/node_modules/eslint-config-cheminfo/index.js from /path/to/eslint.config.js not supported.

Using require() on an ESM-only package that has no CJS export.

fix

Change your eslint.config.js to .mjs extension and use import: `import cheminfo from 'eslint-config-cheminfo'`. Or use dynamic import.

Parsing error: The keyword 'import' is reserved

ESLint is not configured for ES modules or flat config is not enabled.

fix

Ensure you are using ESLint ^9.39.1 and a flat config file (eslint.config.mjs). Check that your Node version supports ES modules (>=12).

.eslintrc.json: ESLint couldn't find the config 'eslint-config-cheminfo' after extending.

Trying to use eslint-config-cheminfo with the legacy .eslintrc format, which is not supported since v15.

fix

Remove the 'extends' field from .eslintrc and create an eslint.config.mjs file following the quickstart.

Upgrade

Version history

18.0.0latest on npm

Audit

Dependencies

eslintrequiredESLint is a peer dependency required to use the config

Agent activity

7 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/cheminfo/eslint-config ↗

packagehttps://www.npmjs.com/package/eslint-config-cheminfo ↗