React specific linting rules for ESLint
React specific linting rules for ESLint
Install ESLint either locally or globally. (Note that locally, per project, is strongly preferred)
$ npm install eslint --save-dev
If you installed
ESLintglobally, you have to install React plugin globally too. Otherwise, install it locally.
$ npm install eslint-plugin-react --save-dev
Use our preset to get reasonable defaults:
"extends": [ "eslint:recommended", "plugin:react/recommended" ]
You should also specify settings that will be shared across all the plugin rules. (More about eslint shared settings)
{ "settings": { "react": { "createClass": "createReactClass", // Regex for Component Factory to use, // default to "createReactClass" "pragma": "React", // Pragma to use, default to "React" "fragment": "Fragment", // Fragment to use (may be a property of ), default to "Fragment" "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. // default to latest and warns if missing // It will default to "detect" in the future "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"} ], "linkComponents": [ // Components used as alternatives to for linking, eg. "Hyperlink", {"name": "Link", "linkAttribute": "to"} ] } }
If you do not use a preset you will need to specify individual rules and add extra configuration.
Add "react" to the plugins section.
{ "plugins": [ "react" ] }
Enable JSX support.
With ESLint 2+
{ "parserOptions": { "ecmaFeatures": { "jsx": true } } }
Enable the rules that you would like to use.
"rules": { "react/jsx-uses-react": "error", "react/jsx-uses-vars": "error", }
recommendedconfiguration.\ 🔧: Fixable with
eslint --fix.
| ✔ | 🔧 | Rule | Description | | :---: | :---: | :--- | :--- | | | | 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 | Enforce all defaultProps are defined and not "required" in propTypes. | | | | react/destructuring-assignment | Enforce consistent usage of destructuring assignment of props, state, and context | | ✔ | | 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-foreign-prop-types | Forbid using another component's propTypes | | | | react/forbid-prop-types | Forbid certain propTypes | | | 🔧 | react/function-component-definition | Standardize the way function component get defined | | | | react/no-access-state-in-setstate | Reports when this.state is accessed within setState | | | | react/no-adjacent-inline-elements | Prevent adjacent inline elements not separated by whitespace. | | | | react/no-array-index-key | Prevent usage of Array index in keys | | ✔ | | react/no-children-prop | Prevent passing of children as props. | | | | react/no-danger | Prevent usage of dangerous JSX props | | ✔ | | react/no-danger-with-children | Report when a DOM element is using both children and dangerouslySetInnerHTML | | ✔ | | react/no-deprecated | Prevent usage of deprecated 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 | Flag shouldComponentUpdate when extending 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-string-refs | Prevent string definitions for references and prevent referencing this.refs | | | | react/no-this-in-sfc | Report "this" being used in stateless components | | | | react/no-typos | Prevent common typos | | ✔ | | react/no-unescaped-entities | Detect unescaped HTML entities, which might represent malformed tags | | ✔ | 🔧 | react/no-unknown-property | Prevent usage of unknown DOM property | | | | 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 definition of unused state fields | | | | 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-read-only-props | Require read-only props. | | | | react/prefer-stateless-function | Enforce stateless 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 | | | | react/sort-comp | Enforce component methods order | | | | react/sort-prop-types | Enforce propTypes declarations alphabetical sorting | | | | react/state-in-constructor | State initialization in an ES6 class component should be in a constructor | | | | react/static-property-placement | Defines where React component static properties should be positioned. | | | | react/style-prop-object | Enforce style prop value is an object | | | | react/void-dom-elements-no-children | Prevent passing of children to void DOM elements (e.g.
). | <!-- AUTO-GENERATED-CONTENT:END -->
| ✔ | 🔧 | Rule | Description | | :---: | :---: | :--- | :--- | | | 🔧 | react/jsx-boolean-value | Enforce boolean attributes notation in JSX | | | | react/jsx-child-element-spacing | Ensures inline tags are not rendered without spaces between them | | | 🔧 | react/jsx-closing-bracket-location | Validate closing bracket location in JSX | | | 🔧 | react/jsx-closing-tag-location | Validate closing tag location for multiline JSX | | | 🔧 | react/jsx-curly-brace-presence | Disallow unnecessary JSX expressions when literals alone are sufficient or enfore JSX expressions on literals in JSX children or attributes | | | 🔧 | react/jsx-curly-newline | Enforce consistent line breaks inside jsx curly | | | 🔧 | react/jsx-curly-spacing | Enforce or disallow spaces inside of curly braces in JSX attributes | | | 🔧 | react/jsx-equals-spacing | Disallow or enforce spaces around equal signs in JSX attributes | | | | react/jsx-filename-extension | Restrict file extensions that may contain JSX | | | 🔧 | react/jsx-first-prop-new-line | Ensure proper position of the first property in JSX | | | 🔧 | react/jsx-fragments | Enforce shorthand or standard form for React fragments | | | | react/jsx-handler-names | Enforce event handler naming conventions in JSX | | | 🔧 | react/jsx-indent | Validate JSX indentation | | | 🔧 | react/jsx-indent-props | Validate props indentation in JSX | | ✔ | | react/jsx-key | Report missing
keyprops in iterators/collection literals | | | | react/jsx-max-depth | Validate JSX maximum depth | | | 🔧 | react/jsx-max-props-per-line | Limit maximum of props on a single line in JSX | | | 🔧 | react/jsx-newline | Enforce a new line after jsx elements and expressions | | | | react/jsx-no-bind | Prevents usage of Function.prototype.bind and arrow functions in React component props | | ✔ | | react/jsx-no-comment-textnodes | Comments inside children section of tag should be placed inside braces | | | | react/jsx-no-constructed-context-values | Prevents JSX context provider values from taking values that will cause needless rerenders. | | ✔ | | react/jsx-no-duplicate-props | Enforce no duplicate props | | | | react/jsx-no-literals | Prevent using string literals in React component definition | | | | react/jsx-no-script-url | Forbid
javascript:URLs | | ✔ | 🔧 | react/jsx-no-target-blank | Forbid
target="_blank"attribute without
rel="noreferrer"| | ✔ | | react/jsx-no-undef | Disallow undeclared variables in JSX | | | 🔧 | react/jsx-no-useless-fragment | Disallow unnecessary fragments | | | 🔧 | react/jsx-one-expression-per-line | Limit to one expression per line in JSX | | | | react/jsx-pascal-case | Enforce PascalCase for user-defined JSX components | | | 🔧 | react/jsx-props-no-multi-spaces | Disallow multiple spaces between inline JSX props | | | | react/jsx-props-no-spreading | Prevent JSX prop spreading | | | | react/jsx-sort-default-props | Enforce default props alphabetical sorting | | | 🔧 | react/jsx-sort-props | Enforce props alphabetical sorting | | | 🔧 | react/jsx-space-before-closing | Validate spacing before closing bracket in JSX | | | 🔧 | react/jsx-tag-spacing | Validate whitespace in and around the JSX opening and closing brackets | | ✔ | | react/jsx-uses-react | Prevent React to be marked as unused | | ✔ | | react/jsx-uses-vars | Prevent variables used in JSX to be marked as unused | | | 🔧 | react/jsx-wrap-multilines | Prevent missing parentheses around multilines JSX | <!-- AUTO-GENERATED-CONTENT:END -->
This plugin exports a
recommendedconfiguration that enforces React good practices.
To enable this configuration use the
extendsproperty in your
.eslintrcconfig file:
{ "extends": ["eslint:recommended", "plugin:react/recommended"] }
See ESLint documentation for more information about extending configuration files.
This plugin also exports an
allconfiguration that includes every available rule. This pairs well with the
eslint:allrule.
{ "plugins": [ "react" ], "extends": ["eslint:all", "plugin:react/all"] }
Note: These configurations will import
eslint-plugin-reactand enable JSX in parser options.
ESLint-plugin-React is licensed under the MIT License.