eslint-config

This is based on the AirBnB style guide, but includes a number of additional plugins and some custom rules for our preferences.

Checkout the index.js for the details.

Plugins

• AirBnB: https://github.com/airbnb/javascript
• Import: https://github.com/benmosher/eslint-plugin-import
• ESLint Comments: https://github.com/mysticatea/eslint-plugin-eslint-comments
• SonarJS: https://github.com/SonarSource/eslint-plugin-sonarjs
• Promise: https://github.com/xjamundx/eslint-plugin-promise
• Prettier-ESLint compatibility: https://github.com/prettier/eslint-config-prettier
• Unicorn: https://github.com/sindresorhus/eslint-plugin-unicorn

Occasionally look here for new good stuff.

Install

To install just the config, use the line below.

npm i -D @searchspring/eslint-config

It's recommended to also install the Searchspring prettier config:

npm i -D @searchspring/prettier

In order to install all the related dependencies and a typical configuration for a JS project, also run the following:

npm i -D eslint husky lint-staged prettier fixpack

Then update your package.json with the following:

{
	husky: {
		hooks: {
			// Runs staged files for a commit through the scripts below
			'pre-commit': 'lint-staged',
		},
	},
	// Scripts for staged files
	'lint-staged': {
		'./package.json': ['fixpack', 'prettier --write'],
		'*.{js,ts}': ['prettier --write', 'eslint --fix'],
	},
	scripts: {
		format: 'prettier --write "**/*.{js,ts,json}"',
		lint: 'eslint --fix "**/*.{js,ts}"',
		// Important to run the fixpack before format, as format will fix the indentation
		style: 'fixpack && npm run format && npm run lint',
	},
}

Additional config if you are using Mocha

• Mocha: https://github.com/lo1tuma/eslint-plugin-mocha

Update your eslint configuration with following:

	env: {
		...
+		mocha: true,
	},
	extends: [
		...
+		'plugin:mocha/recommended',
	]
+	plugins: [..., 'mocha'],
	rules: {
		...
+		'mocha/handle-done-callback': 'error',
+		'mocha/max-top-level-suites': 'off',
+		'mocha/no-exclusive-tests': 'error',
+		'mocha/no-global-tests': 'error',
+		'mocha/no-hooks-for-single-case': 'off',
+		'mocha/no-identical-title': 'error',
+		'mocha/no-mocha-arrows': 'off',
+		'mocha/no-nested-tests': 'error',
+		'mocha/no-pending-tests': 'error',
+		'mocha/no-return-and-callback': 'error',
+		'mocha/no-sibling-hooks': 'error',
	}