.eslintrc.js

/**
 * External dependencies
 */
const { map } = require( 'lodash' );

module.exports = {
	parser: "babel-eslint",
	env: {
		browser: true,
		"jest/globals": true
	},
	globals: {
		__DEV__: true
	},
	plugins: [
		"react",
		"react-native",
		"jest",
		"flowtype"
	],
	extends: [
		"plugin:@wordpress/eslint-plugin/recommended",
		"plugin:flowtype/recommended",
	],
	settings: {
		flowtype: {
			onlyFilesWithFlowAnnotation: true,
		},
		react: {
			pragma: "React",
			version: "16.8.3",
			flowVersion: "0.92.0",
		},
	},
	rules: {
		'no-restricted-syntax': [
			'error',
			// NOTE: We can't include the forward slash in our regex or
			// we'll get a `SyntaxError` (Invalid regular expression: \ at end of pattern)
			// here. That's why we use \\u002F in the regexes below.
			{
				selector: 'ImportDeclaration[source.value=/^@wordpress\\u002F.+\\u002F/]',
				message: 'Path access on WordPress dependencies is not allowed.',
			},
			{
				selector: 'CallExpression[callee.name=/^(__|_x|_n|_nx)$/] Literal[value=/\\.{3}/]',
				message: 'Use ellipsis character (…) in place of three dots',
			},
			{
				selector: 'ImportDeclaration[source.value="lodash"] Identifier.imported[name="memoize"]',
				message: 'Use memize instead of Lodash’s memoize',
			},
			{
				selector: 'CallExpression[callee.object.name="page"][callee.property.name="waitFor"]',
				message: 'Prefer page.waitForSelector instead.',
			},
			{
				selector: 'JSXAttribute[name.name="id"][value.type="Literal"]',
				message: 'Do not use string literals for IDs; use withInstanceId instead.',
			},
			{
				// Discourage the usage of `Math.random()` as it's a code smell
				// for UUID generation, for which we already have a higher-order
				// component: `withInstanceId`.
				selector: 'CallExpression[callee.object.name="Math"][callee.property.name="random"]',
				message: 'Do not use Math.random() to generate unique IDs; use withInstanceId instead. (If you’re not generating unique IDs: ignore this message.)',
			},
			{
				selector: 'CallExpression[callee.name="withDispatch"] > :function > BlockStatement > :not(VariableDeclaration,ReturnStatement)',
				message: 'withDispatch must return an object with consistent keys. Avoid performing logic in `mapDispatchToProps`.',
			},
		],
	},
}