eslint-config-nymph

This is the ESLint shareable config for the Google JavaScript style guide, forked and updated to support ESLint 9 (Flat Config) while still providing a legacy export.

ESLint shareable config for the Google JavaScript style guide (ES2015+ version)

Installation

npm install --save-dev eslint eslint-config-nymph

Usage

You can use this config in two ways depending on your ESLint setup:

1. ESLint 9+ Flat Config (recommended)

• Create eslint.config.js in your project:

import nymph from 'eslint-config-nymph/flat';

export default [
	...nymph,
	// your project overrides go here
];

2. Legacy config (.eslintrc.*)

• In .eslintrc.json:

{
	"extends": ["eslint-config-nymph"]
}

Why config might not apply

• ESLint 9 switched to Flat Config and ignores legacy config files unless you use a compatibility layer. Use the eslint-config-nymph/flat export with an eslint.config.js.
• Make sure you are running ESLint from the project root where eslint.config.js or .eslintrc.* is located.
• If using a monorepo, ensure the config file is visible to the package being linted or pass --config explicitly.
• Ensure your Node.js version is >= 18.18 since ESLint 9 requires modern Node.

License

Apache-2 © Google & Web-Tech-TW