.eslintrc.js

module.exports = {
	root: true,
	extends: 'eslint:recommended',
	env: {
		es6: true,
		node: true,
	},
	parserOptions: {
		sourceType: 'module',
		ecmaVersion: 2017,
	},

	rules: {

		// --->>> best practices

		curly: 'error',
		'eol-last': 'error',
		'newline-per-chained-call': ['error', { ignoreChainWithDepth: 3 }],
		'no-use-before-define': ['error', 'nofunc'],
		'no-console': 'off',

		// --->>> style enforcement

		'comma-dangle': ['error', 'always-multiline'],
		'id-length': [
			'error',
			{
				min: 2,
				max: 25,
				exceptions: ['$', '_'],
			},
		],
		'max-len': ['error', { code: 120, ignoreUrls: true }],
		'max-params': ['error', { max: 4 }],
		'max-statements-per-line': ['error', { max: 2 }],
		'no-extra-semi': 'error',
		'object-property-newline': ['error', { allowMultiplePropertiesPerLine: true }],
		'one-var': ['error', 'never'],
		quotes: ['error', 'single'],
		semi: ['error', 'never'],

		// --->>> white spacing pedantry

		indent: ['error', 'tab'],
		'no-multi-spaces': 'error',
		// https://github.com/eslint/eslint/pull/8061
		'no-trailing-spaces': ['error', { ignoreComments: true }],
		'no-whitespace-before-property': 'error',
		'array-bracket-spacing': ['error', 'never'],
		'block-spacing': 'error',
		'comma-spacing': ['error', { before: false, after: true }],
		'computed-property-spacing': ['error', 'never'],
		'key-spacing': ['error', { beforeColon: false, afterColon: true }],
		'keyword-spacing': ['error', { before: true, after: true }],
		'object-curly-spacing': ['error', 'always'],
		'semi-spacing': ['error', { before: false }],
		'space-before-blocks': 'error',
		'space-before-function-paren': ['error', 'never'],
		'space-in-parens': ['error', 'never'],
		'space-infix-ops': ['error', { int32Hint: false }],
		'space-unary-ops': ['error', { words: true, nonwords: false }],
		'arrow-spacing': 'error',
		'generator-star-spacing': 'error',
		'rest-spread-spacing': ['error', 'never'],
		'template-curly-spacing': 'error',
		'yield-star-spacing': 'error',
	},
}