.eslintrc.js

const config = {
	root: true,
	parser: 'babel-eslint',
	extends: [
		'eslint:recommended',
		'prettier',
		'prettier/flowtype',
		'prettier/react',
		'plugin:flowtype/recommended',
	],
	parserOptions: {
		ecmaVersion: 6,
		ecmaFeatures: {
			jsx: true,
			experimentalObjectRestSpread: true,
		},
		sourceType: 'module',
	},
	env: {
		browser: true,
		node: true,
		jest: true,
		jasmine: true,
		es6: true,
	},
	plugins: ['react', 'flowtype'],
	rules: {
		'array-callback-return': 2,
		'comma-dangle': 0,
		'eol-last': 2,
		indent: [0, 'tab'],
		'no-console': 0,
		'no-empty-pattern': 2,
		'no-lone-blocks': 2,
		'no-lonely-if': 2,
		'no-multi-spaces': 2,
		'no-negated-condition': 2,
		'no-trailing-spaces': 2,
		'no-unused-vars': [2, { args: 'none' }],
		'no-use-before-define': 2,
		'no-useless-call': 2,
		'no-useless-concat': 2,
		'no-useless-escape': 2,
		'no-var': 2,
		'no-whitespace-before-property': 2,
		'prefer-const': 2,
		'prefer-template': 2,
		'quote-props': [2, 'as-needed'],
		'react/jsx-no-undef': 0,
		'react/jsx-uses-react': 1,
		'react/jsx-uses-vars': 1,
		'react/no-deprecated': 2,
		'react/no-string-refs': 1,
		'react/react-in-jsx-scope': 2,
		'react/jsx-wrap-multilines': 2,
		'react/jsx-boolean-value': 2,
		'react/jsx-equals-spacing': [2, 'never'],
		'react/jsx-no-duplicate-props': 2,
		'react/jsx-pascal-case': 2,
		'react/jsx-uses-react': 2,
		semi: 2,
		'space-in-parens': [2, 'never'],
		'spaced-comment': [2, 'always'],
		strict: 0,
	},
};

module.exports = config;