ESLint-plugin-React

React specific linting rules for ESLint

Installation

Install ESLint either locally or globally.

sh $ npm install eslint --save-dev

If you installed ESLint globally, you have to install React plugin globally too. Otherwise, install it locally.

sh $ npm install eslint-plugin-react --save-dev

Configuration

Use our preset to get reasonable defaults:

json "extends": [ "eslint:recommended", "plugin:react/recommended" ]

You should also specify settings that will be shared across all the plugin rules.

json5 { "settings": { "react": { "createClass": "createReactClass", // Regex for Component Factory to use, // default to "createReactClass" "pragma": "React", // Pragma to use, default to "React" "version": "detect", // React version. "detect" automatically picks the version you have installed. // You can also use `16.0`, `16.3`, etc, if you want to override the detected value. "flowVersion": "0.53" // Flow version }, "propWrapperFunctions": [ // The names of any function used to wrap propTypes, e.g. `forbidExtraProps`. If this isn't set, any propTypes wrapped in a function will be skipped. "forbidExtraProps", {"property": "freeze", "object": "Object"}, {"property": "myFavoriteWrapper"} ] } }

If you do not use a preset you will need to specify individual rules and add extra configuration.

Add "react" to the plugins section.

json { "plugins": [ "react" ] }

Enable JSX support.

With ESLint 2+

json { "parserOptions": { "ecmaFeatures": { "jsx": true } } }

Enable the rules that you would like to use.

json "rules": { "react/jsx-uses-react": "error", "react/jsx-uses-vars": "error", }

List of supported rules

react/boolean-prop-naming: Enforces consistent naming for boolean props
react/button-has-type: Forbid "button" element without an explicit "type" attribute
react/default-props-match-prop-types: Prevent extraneous defaultProps on components
react/destructuring-assignment: Rule enforces consistent usage of destructuring assignment in component
react/display-name: Prevent missing displayName in a React component definition
react/forbid-component-props: Forbid certain props on Components
react/forbid-dom-props: Forbid certain props on DOM Nodes
react/forbid-elements: Forbid certain elements
react/forbid-prop-types: Forbid certain propTypes
react/forbid-foreign-prop-types: Forbid foreign propTypes
react/no-access-state-in-setstate: Prevent using this.state inside this.setState
react/no-array-index-key: Prevent using Array index in key props
react/no-children-prop: Prevent passing children as props
react/no-danger: Prevent usage of dangerous JSX properties
react/no-danger-with-children: Prevent problem with children and props.dangerouslySetInnerHTML
react/no-deprecated: Prevent usage of deprecated methods, including component lifecyle methods
react/no-did-mount-set-state: Prevent usage of setState in componentDidMount
react/no-did-update-set-state: Prevent usage of setState in componentDidUpdate
react/no-direct-mutation-state: Prevent direct mutation of this.state
react/no-find-dom-node: Prevent usage of findDOMNode
react/no-is-mounted: Prevent usage of isMounted
react/no-multi-comp: Prevent multiple component definition per file
react/no-redundant-should-component-update: Prevent usage of shouldComponentUpdate when extending React.PureComponent
react/no-render-return-value: Prevent usage of the return value of React.render
react/no-set-state: Prevent usage of setState
react/no-typos: Prevent common casing typos
react/no-string-refs: Prevent using string references in ref attribute.
react/no-this-in-sfc: Prevent using this in stateless functional components
react/no-unescaped-entities: Prevent invalid characters from appearing in markup
react/no-unknown-property: Prevent usage of unknown DOM property (fixable)
react/no-unsafe: Prevent usage of unsafe lifecycle methods
react/no-unused-prop-types: Prevent definitions of unused prop types
react/no-unused-state: Prevent definitions of unused state properties
react/no-will-update-set-state: Prevent usage of setState in componentWillUpdate
react/prefer-es6-class: Enforce ES5 or ES6 class for React Components
react/prefer-stateless-function: Enforce stateless React Components to be written as a pure function
react/prop-types: Prevent missing props validation in a React component definition
react/react-in-jsx-scope: Prevent missing React when using JSX
react/require-default-props: Enforce a defaultProps definition for every prop that is not a required prop
react/require-optimization: Enforce React components to have a shouldComponentUpdate method
react/require-render-return: Enforce ES5 or ES6 class for returning value in render function
react/self-closing-comp: Prevent extra closing tags for components without children (fixable)
react/sort-comp: Enforce component methods order (fixable)
react/sort-prop-types: Enforce propTypes declarations alphabetical sorting
react/style-prop-object: Enforce style prop value being an object
react/void-dom-elements-no-children: Prevent void DOM elements (e.g. <img />, <br />) from receiving children

JSX-specific rules

react/jsx-boolean-value: Enforce boolean attributes notation in JSX (fixable)
react/jsx-child-element-spacing: Enforce or disallow spaces inside of curly braces in JSX attributes and expressions.
react/jsx-closing-bracket-location: Validate closing bracket location in JSX (fixable)
react/jsx-closing-tag-location: Validate closing tag location in JSX (fixable)
react/jsx-curly-spacing: Enforce or disallow spaces inside of curly braces in JSX attributes and expressions (fixable)
react/jsx-equals-spacing: Enforce or disallow spaces around equal signs in JSX attributes (fixable)
react/jsx-filename-extension: Restrict file extensions that may contain JSX
react/jsx-first-prop-new-line: Enforce position of the first prop in JSX (fixable)
react/jsx-handler-names: Enforce event handler naming conventions in JSX
react/jsx-indent: Validate JSX indentation (fixable)
react/jsx-indent-props: Validate props indentation in JSX (fixable)
react/jsx-key: Validate JSX has key prop when in array or iterator
react/jsx-max-depth: Validate JSX maximum depth
react/jsx-max-props-per-line: Limit maximum of props on a single line in JSX (fixable)
react/jsx-no-bind: Prevent usage of .bind() and arrow functions in JSX props
react/jsx-no-comment-textnodes: Prevent comments from being inserted as text nodes
react/jsx-no-duplicate-props: Prevent duplicate props in JSX
react/jsx-no-literals: Prevent usage of unwrapped JSX strings
react/jsx-no-target-blank: Prevent usage of unsafe target='_blank'
react/jsx-no-undef: Disallow undeclared variables in JSX
react/jsx-one-expression-per-line: Limit to one expression per line in JSX
react/jsx-curly-brace-presence: Enforce curly braces or disallow unnecessary curly braces in JSX
react/jsx-fragments: Enforce shorthand or standard form for React fragments
react/jsx-pascal-case: Enforce PascalCase for user-defined JSX components
react/jsx-props-no-multi-spaces: Disallow multiple spaces between inline JSX props (fixable)
react/jsx-sort-default-props: Enforce default props alphabetical sorting
react/jsx-sort-props: Enforce props alphabetical sorting (fixable)
react/jsx-space-before-closing: Validate spacing before closing bracket in JSX (fixable)
react/jsx-tag-spacing: Validate whitespace in and around the JSX opening and closing brackets (fixable)
react/jsx-uses-react: Prevent React to be incorrectly marked as unused
react/jsx-uses-vars: Prevent variables used in JSX to be incorrectly marked as unused
react/jsx-wrap-multilines: Prevent missing parentheses around multilines JSX (fixable)

Other useful plugins

JSX accessibility: eslint-plugin-jsx-a11y
React Native: eslint-plugin-react-native

Shareable configurations

All

This plugin also exports an all configuration that includes every available rule. This pairs well with the eslint:all rule.

json { "plugins": [ "react" ], "extends": ["eslint:all", "plugin:react/all"] }

Note: These configurations will import eslint-plugin-react and enable JSX in parser options.

License

ESLint-plugin-React is licensed under the MIT License.