.eslintrc.js

module.exports = {
	root: true,
	parser: 'babel-eslint',

	env: {
		es6: true,
	},

	// Map from global var to bool specifying if it can be redefined
	'globals': {
		__DEV__: true,
		__dirname: false,
		__fbBatchedBridgeConfig: false,
		alert: false,
		cancelAnimationFrame: false,
		cancelIdleCallback: false,
		clearImmediate: true,
		clearInterval: false,
		clearTimeout: false,
		console: false,
		document: false,
		escape: false,
		Event: false,
		EventTarget: false,
		exports: false,
		fetch: false,
		FormData: false,
		global: false,
		Map: true,
		module: false,
		navigator: false,
		process: false,
		Promise: true,
		requestAnimationFrame: true,
		requestIdleCallback: true,
		require: false,
		Set: true,
		setImmediate: true,
		setInterval: false,
		setTimeout: false,
		window: false,
		XMLHttpRequest: false,
	},

	plugins: [
		'eslint-comments',
		'react',
		'react-native',
	],
	rules: {
		// General
		'comma-dangle': [ 1, 'always-multiline' ], // allow or disallow trailing commas
		'no-cond-assign': 1,             // disallow assignment in conditional expressions
		'no-console': 0,                 // disallow use of console (off by default in the node environment)
		'no-const-assign': 2,            // disallow assignment to const-declared variables
		'no-constant-condition': 0,      // disallow use of constant expressions in conditions
		'no-control-regex': 1,           // disallow control characters in regular expressions
		'no-debugger': 1,                // disallow use of debugger
		'no-dupe-class-members': 2,      // Disallow duplicate name in class members
		'no-dupe-keys': 2,               // disallow duplicate keys when creating object literals
		'no-empty': 0,                   // disallow empty statements
		'no-ex-assign': 1,               // disallow assigning to the exception in a catch block
		'no-extra-boolean-cast': 1,      // disallow double-negation boolean casts in a boolean context
		'no-extra-parens': 0,            // disallow unnecessary parentheses (off by default)
		'no-extra-semi': 1,              // disallow unnecessary semicolons
		'no-func-assign': 1,             // disallow overwriting functions written as function declarations
		'no-inner-declarations': 0,      // disallow function or variable declarations in nested blocks
		'no-invalid-regexp': 1,          // disallow invalid regular expression strings in the RegExp constructor
		'no-negated-in-lhs': 1,          // disallow negation of the left operand of an in expression
		'no-obj-calls': 1,               // disallow the use of object properties of the global object (Math and JSON) as functions
		'no-regex-spaces': 1,            // disallow multiple spaces in a regular expression literal
		'no-reserved-keys': 0,           // disallow reserved words being used as object literal keys (off by default)
		'no-sparse-arrays': 1,           // disallow sparse arrays
		'no-unreachable': 2,             // disallow unreachable statements after a return, throw, continue, or break statement
		'use-isnan': 1,                  // disallow comparisons with the value NaN
		'valid-jsdoc': 0,                // Ensure JSDoc comments are valid (off by default)
		'valid-typeof': 1,               // Ensure that the results of typeof are compared against a valid string

		// Best Practices
		// These are rules designed to prevent you from making mistakes. They either prescribe a better way of doing something or help you
		// avoid footguns.

		'block-scoped-var': 0,           // treat var statements as if they were block scoped (off by default)
		'complexity': 0,                 // specify the maximum cyclomatic complexity allowed in a program (off by default)
		'consistent-return': 0,          // require return statements to either always or never specify values
		'curly': 1,                      // specify curly brace conventions for all control statements
		'default-case': 0,               // require default case in switch statements (off by default)
		'dot-notation': 1,               // encourages use of dot notation whenever possible
		'eqeqeq': [ 1, 'allow-null' ],     // require the use of === and !==
		'guard-for-in': 0,               // make sure for-in loops have an if statement (off by default)
		'no-alert': 1,                   // disallow the use of alert, confirm, and prompt
		'no-caller': 1,                  // disallow use of arguments.caller or arguments.callee
		'no-div-regex': 1,               // disallow division operators explicitly at beginning of regular expression (off by default)
		'no-else-return': 0,             // disallow else after a return in an if (off by default)
		'no-eq-null': 0,                 // disallow comparisons to null without a type-checking operator (off by default)
		'no-eval': 2,                    // disallow use of eval()
		'no-extend-native': 1,           // disallow adding to native types
		'no-extra-bind': 1,              // disallow unnecessary function binding
		'no-fallthrough': 1,             // disallow fallthrough of case statements
		'no-floating-decimal': 1,        // disallow the use of leading or trailing decimal points in numeric literals (off by default)
		'no-implied-eval': 1,            // disallow use of eval()-like methods
		'no-labels': 1,                  // disallow use of labeled statements
		'no-iterator': 1,                // disallow usage of __iterator__ property
		'no-lone-blocks': 1,             // disallow unnecessary nested blocks
		'no-loop-func': 0,               // disallow creation of functions within loops
		'no-multi-str': 0,               // disallow use of multiline strings
		'no-native-reassign': 0,         // disallow reassignments of native objects
		'no-new': 1,                     // disallow use of new operator when not part of the assignment or comparison
		'no-new-func': 2,                // disallow use of new operator for Function object
		'no-new-wrappers': 1,            // disallows creating new instances of String,Number, and Boolean
		'no-octal': 1,                   // disallow use of octal literals
		'no-octal-escape': 1,            // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
		'no-proto': 1,                   // disallow usage of __proto__ property
		'no-redeclare': 0,               // disallow declaring the same variable more then once
		'no-return-assign': 1,           // disallow use of assignment in return statement
		'no-script-url': 1,              // disallow use of javascript: urls.
		'no-self-compare': 1,            // disallow comparisons where both sides are exactly the same (off by default)
		'no-sequences': 1,               // disallow use of comma operator
		'no-unused-expressions': 0,      // disallow usage of expressions in statement position
		'no-void': 1,                    // disallow use of void operator (off by default)
		'no-warning-comments': 0,        // disallow usage of configurable warning terms in comments": 1,                        // e.g. TODO
																		 // or FIXME (off by default)
		'no-with': 1,                    // disallow use of the with statement
		'radix': 1,                      // require use of the second argument for parseInt() (off by default)
		'semi-spacing': 1,	             // require a space after a semi-colon
		'vars-on-top': 0,                // requires to declare all vars on top of their containing scope (off by default)
		'wrap-iife': 0,                  // require immediate function invocation to be wrapped in parentheses (off by default)
		'yoda': 1,                       // require or disallow Yoda conditions

		// Variables
		// These rules have to do with variable declarations.

		'no-catch-shadow': 1,            // disallow the catch clause parameter name being the same as a variable in the outer scope (off by
																		 // default in the node environment)
		'no-delete-var': 1,              // disallow deletion of variables
		'no-label-var': 1,               // disallow labels that share a name with a variable
		'no-shadow': 1,                  // disallow declaration of variables already declared in the outer scope
		'no-shadow-restricted-names': 1, // disallow shadowing of names such as arguments
		'no-undef': 2,                   // disallow use of undeclared variables unless mentioned in a /*global */ block
		'no-undefined': 0,               // disallow use of undefined variable (off by default)
		'no-undef-init': 1,              // disallow use of undefined when initializing variables
		'no-unused-vars': [ 1, { 'vars': 'all', 'args': 'none', 'ignoreRestSiblings': true } ], // disallow declaration of variables that are
																																														// not used in the code
		'no-use-before-define': 0,       // disallow use of variables before they are defined

		// Node.js
		// These rules are specific to JavaScript running on Node.js.

		'handle-callback-err': 1,        // enforces error handling in callbacks (off by default) (on by default in the node environment)
		'no-mixed-requires': 1,          // disallow mixing regular variable and require declarations (off by default) (on by default in the
																		 // node environment)
		'no-new-require': 1,             // disallow use of new operator with the require function (off by default) (on by default in the node
																		 // environment)
		'no-path-concat': 1,             // disallow string concatenation with __dirname and __filename (off by default) (on by default in the
																		 // node environment)
		'no-process-exit': 0,            // disallow process.exit() (on by default in the node environment)
		'no-restricted-modules': 1,      // restrict usage of specified node modules (off by default)
		'no-sync': 0,                    // disallow use of synchronous methods (off by default)

		// ESLint Comments Plugin
		// The following rules are made available via `eslint-plugin-eslint-comments`
		'eslint-comments/no-aggregating-enable': 1, // disallows eslint-enable comments for multiple eslint-disable comments
		'eslint-comments/no-unlimited-disable': 1, // disallows eslint-disable comments without rule names
		'eslint-comments/no-unused-disable': 1, // disallow disables that don't cover any errors
		'eslint-comments/no-unused-enable': 1, // // disallow enables that don't enable anything or enable rules that weren't disabled

		// Stylistic Issues
		// These rules are purely matters of style and are quite subjective.

		'key-spacing': 0,
		'keyword-spacing': 1,            // enforce spacing before and after keywords
		'jsx-quotes': [ 1, 'prefer-double' ], // enforces the usage of double quotes for all JSX attribute values which doesn’t contain a
																					// double quote
		'comma-spacing': 0,
		'no-multi-spaces': 0,
		'brace-style': 0,                // enforce one true brace style (off by default)
		'camelcase': 0,                  // require camel case names
		'consistent-this': 1,            // enforces consistent naming when capturing the current execution context (off by default)
		'eol-last': 1,                   // enforce newline at the end of file, with no multiple empty lines
		'func-names': 0,                 // require function expressions to have a name (off by default)
		'func-style': 0,                 // enforces use of function declarations or expressions (off by default)
		'new-cap': 0,                    // require a capital letter for constructors
		'new-parens': 1,                 // disallow the omission of parentheses when invoking a constructor with no arguments
		'no-nested-ternary': 0,          // disallow nested ternary expressions (off by default)
		'no-array-constructor': 1,       // disallow use of the Array constructor
		'no-empty-character-class': 1,   // disallow the use of empty character classes in regular expressions
		'no-lonely-if': 0,               // disallow if as the only statement in an else block (off by default)
		'no-new-object': 1,              // disallow use of the Object constructor
		'no-spaced-func': 1,             // disallow space between function identifier and application
		'no-ternary': 0,                 // disallow the use of ternary operators (off by default)
		'no-trailing-spaces': 1,         // disallow trailing whitespace at the end of lines
		'no-underscore-dangle': 0,       // disallow dangling underscores in identifiers
		'no-mixed-spaces-and-tabs': 1,   // disallow mixed spaces and tabs for indentation
		'quotes': [ 1, 'single', 'avoid-escape' ], // specify whether double or single quotes should be used
		'quote-props': 0,                // require quotes around object literal property names (off by default)
		'semi': 1,                       // require or disallow use of semicolons instead of ASI
		'sort-vars': 0,                  // sort variables within the same declaration block (off by default)
		'space-in-brackets': 0,          // require or disallow spaces inside brackets (off by default)
		'space-in-parens': 0,            // require or disallow spaces inside parentheses (off by default)
		'space-infix-ops': 1,            // require spaces around operators
		'space-unary-ops': [ 1, { 'words': true, 'nonwords': false } ], // require or disallow spaces before/after unary operators (words on by
																																		// default, nonwords off by default)
		'max-nested-callbacks': 0,       // specify the maximum depth callbacks can be nested (off by default)
		'one-var': 0,                    // allow just one var statement per function (off by default)
		'wrap-regex': 0,                 // require regex literals to be wrapped in parentheses (off by default)

		// Legacy
		// The following rules are included for compatibility with JSHint and JSLint. While the names of the rules may not match up with the
		// JSHint/JSLint counterpart, the functionality is the same.

		'max-depth': 0,                  // specify the maximum depth that blocks can be nested (off by default)
		'max-len': 0,                    // specify the maximum length of a line in your program (off by default)
		'max-params': 0,                 // limits the number of parameters that can be used in the function declaration. (off by default)
		'max-statements': 0,             // specify the maximum number of statement allowed in a function (off by default)
		'no-bitwise': 1,                 // disallow use of bitwise operators (off by default)
		'no-plusplus': 0,                // disallow use of unary operators, ++ and -- (off by default)

		// React Plugin
		// The following rules are made available via `eslint-plugin-react`.

		'react/display-name': 0,
		'react/jsx-boolean-value': 0,
		'react/jsx-no-comment-textnodes': 1,
		'react/jsx-no-duplicate-props': 2,
		'react/jsx-no-undef': 2,
		'react/jsx-sort-props': 0,
		'react/jsx-uses-react': 1,
		'react/jsx-uses-vars': 1,
		'react/no-did-mount-set-state': 0,
		'react/no-did-update-set-state': 0,
		'react/no-multi-comp': 0,
		'react/no-string-refs': 1,
		'react/no-unknown-property': 0,
		'react/prop-types': 0,
		'react/react-in-jsx-scope': 1,
		'react/self-closing-comp': 1,
		'react/wrap-multilines': 0,

		// React-Native Plugin
		// The following rules are made available via `eslint-plugin-react-native`

		'react-native/no-inline-styles': 1,
	},

	settings: {
		react: {
			version: 'detect',
		},
	},
};