281 lines
17 KiB
Markdown
281 lines
17 KiB
Markdown
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ESLint-plugin-React
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===================
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[![Maintenance Status][status-image]][status-url] [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Dependency Status][deps-image]][deps-url] [![Coverage Status][coverage-image]][coverage-url] [![Code Climate][climate-image]][climate-url] [![Tidelift][tidelift-image]][tidelift-url]
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React specific linting rules for ESLint
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# Installation
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Install [ESLint](https://www.github.com/eslint/eslint) either locally or globally. (Note that locally, per project, is strongly preferred)
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```sh
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$ npm install eslint --save-dev
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```
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If you installed `ESLint` globally, you have to install React plugin globally too. Otherwise, install it locally.
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```sh
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$ npm install eslint-plugin-react --save-dev
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```
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# Configuration
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Use [our preset](#recommended) to get reasonable defaults:
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```json
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"extends": [
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"eslint:recommended",
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"plugin:react/recommended"
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]
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```
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You should also specify settings that will be shared across all the plugin rules. ([More about eslint shared settings](https://eslint.org/docs/user-guide/configuring#adding-shared-settings))
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```json5
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{
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"settings": {
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"react": {
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"createClass": "createReactClass", // Regex for Component Factory to use,
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// default to "createReactClass"
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"pragma": "React", // Pragma to use, default to "React"
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"version": "detect", // React version. "detect" automatically picks the version you have installed.
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// You can also use `16.0`, `16.3`, etc, if you want to override the detected value.
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// default to latest and warns if missing
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// It will default to "detect" in the future
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"flowVersion": "0.53" // Flow version
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},
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"propWrapperFunctions": [
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// 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.
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"forbidExtraProps",
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{"property": "freeze", "object": "Object"},
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{"property": "myFavoriteWrapper"}
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],
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"linkComponents": [
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// Components used as alternatives to <a> for linking, eg. <Link to={ url } />
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"Hyperlink",
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{"name": "Link", "linkAttribute": "to"}
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]
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}
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}
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```
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If you do not use a preset you will need to specify individual rules and add extra configuration.
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Add "react" to the plugins section.
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```json
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{
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"plugins": [
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"react"
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]
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}
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```
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Enable JSX support.
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With ESLint 2+
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```json
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{
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"parserOptions": {
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"ecmaFeatures": {
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"jsx": true
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}
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}
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}
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```
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Enable the rules that you would like to use.
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```json
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"rules": {
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"react/jsx-uses-react": "error",
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"react/jsx-uses-vars": "error",
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}
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```
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# List of supported rules
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<!-- AUTO-GENERATED-CONTENT:START (BASIC_RULES) -->
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* [react/boolean-prop-naming](docs/rules/boolean-prop-naming.md): Enforces consistent naming for boolean props
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* [react/button-has-type](docs/rules/button-has-type.md): Forbid "button" element without an explicit "type" attribute
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* [react/default-props-match-prop-types](docs/rules/default-props-match-prop-types.md): Enforce all defaultProps are defined and not "required" in propTypes.
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* [react/destructuring-assignment](docs/rules/destructuring-assignment.md): Enforce consistent usage of destructuring assignment of props, state, and context
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* [react/display-name](docs/rules/display-name.md): Prevent missing displayName in a React component definition
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* [react/forbid-component-props](docs/rules/forbid-component-props.md): Forbid certain props on components
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* [react/forbid-dom-props](docs/rules/forbid-dom-props.md): Forbid certain props on DOM Nodes
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* [react/forbid-elements](docs/rules/forbid-elements.md): Forbid certain elements
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* [react/forbid-foreign-prop-types](docs/rules/forbid-foreign-prop-types.md): Forbid using another component's propTypes
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* [react/forbid-prop-types](docs/rules/forbid-prop-types.md): Forbid certain propTypes
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* [react/function-component-definition](docs/rules/function-component-definition.md): Standardize the way function component get defined (fixable)
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* [react/no-access-state-in-setstate](docs/rules/no-access-state-in-setstate.md): Reports when this.state is accessed within setState
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* [react/no-adjacent-inline-elements](docs/rules/no-adjacent-inline-elements.md): Prevent adjacent inline elements not separated by whitespace.
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* [react/no-array-index-key](docs/rules/no-array-index-key.md): Prevent usage of Array index in keys
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* [react/no-children-prop](docs/rules/no-children-prop.md): Prevent passing of children as props.
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* [react/no-danger](docs/rules/no-danger.md): Prevent usage of dangerous JSX props
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* [react/no-danger-with-children](docs/rules/no-danger-with-children.md): Report when a DOM element is using both children and dangerouslySetInnerHTML
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* [react/no-deprecated](docs/rules/no-deprecated.md): Prevent usage of deprecated methods
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* [react/no-did-mount-set-state](docs/rules/no-did-mount-set-state.md): Prevent usage of setState in componentDidMount
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* [react/no-did-update-set-state](docs/rules/no-did-update-set-state.md): Prevent usage of setState in componentDidUpdate
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* [react/no-direct-mutation-state](docs/rules/no-direct-mutation-state.md): Prevent direct mutation of this.state
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* [react/no-find-dom-node](docs/rules/no-find-dom-node.md): Prevent usage of findDOMNode
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* [react/no-is-mounted](docs/rules/no-is-mounted.md): Prevent usage of isMounted
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* [react/no-multi-comp](docs/rules/no-multi-comp.md): Prevent multiple component definition per file
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* [react/no-redundant-should-component-update](docs/rules/no-redundant-should-component-update.md): Flag shouldComponentUpdate when extending PureComponent
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* [react/no-render-return-value](docs/rules/no-render-return-value.md): Prevent usage of the return value of React.render
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* [react/no-set-state](docs/rules/no-set-state.md): Prevent usage of setState
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* [react/no-string-refs](docs/rules/no-string-refs.md): Prevent string definitions for references and prevent referencing this.refs
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* [react/no-this-in-sfc](docs/rules/no-this-in-sfc.md): Report "this" being used in stateless components
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* [react/no-typos](docs/rules/no-typos.md): Prevent common typos
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* [react/no-unescaped-entities](docs/rules/no-unescaped-entities.md): Detect unescaped HTML entities, which might represent malformed tags
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* [react/no-unknown-property](docs/rules/no-unknown-property.md): Prevent usage of unknown DOM property (fixable)
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* [react/no-unsafe](docs/rules/no-unsafe.md): Prevent usage of unsafe lifecycle methods
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* [react/no-unused-prop-types](docs/rules/no-unused-prop-types.md): Prevent definitions of unused prop types
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* [react/no-unused-state](docs/rules/no-unused-state.md): Prevent definition of unused state fields
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* [react/no-will-update-set-state](docs/rules/no-will-update-set-state.md): Prevent usage of setState in componentWillUpdate
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* [react/prefer-es6-class](docs/rules/prefer-es6-class.md): Enforce ES5 or ES6 class for React Components
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* [react/prefer-read-only-props](docs/rules/prefer-read-only-props.md): Require read-only props. (fixable)
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* [react/prefer-stateless-function](docs/rules/prefer-stateless-function.md): Enforce stateless components to be written as a pure function
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* [react/prop-types](docs/rules/prop-types.md): Prevent missing props validation in a React component definition
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* [react/react-in-jsx-scope](docs/rules/react-in-jsx-scope.md): Prevent missing React when using JSX
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* [react/require-default-props](docs/rules/require-default-props.md): Enforce a defaultProps definition for every prop that is not a required prop.
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* [react/require-optimization](docs/rules/require-optimization.md): Enforce React components to have a shouldComponentUpdate method
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* [react/require-render-return](docs/rules/require-render-return.md): Enforce ES5 or ES6 class for returning value in render function
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* [react/self-closing-comp](docs/rules/self-closing-comp.md): Prevent extra closing tags for components without children (fixable)
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* [react/sort-comp](docs/rules/sort-comp.md): Enforce component methods order
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* [react/sort-prop-types](docs/rules/sort-prop-types.md): Enforce propTypes declarations alphabetical sorting
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* [react/state-in-constructor](docs/rules/state-in-constructor.md): State initialization in an ES6 class component should be in a constructor
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* [react/static-property-placement](docs/rules/static-property-placement.md): Defines where React component static properties should be positioned.
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* [react/style-prop-object](docs/rules/style-prop-object.md): Enforce style prop value is an object
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* [react/void-dom-elements-no-children](docs/rules/void-dom-elements-no-children.md): Prevent passing of children to void DOM elements (e.g. `<br />`).
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<!-- AUTO-GENERATED-CONTENT:END -->
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## JSX-specific rules
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<!-- AUTO-GENERATED-CONTENT:START (JSX_RULES) -->
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* [react/jsx-boolean-value](docs/rules/jsx-boolean-value.md): Enforce boolean attributes notation in JSX (fixable)
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* [react/jsx-child-element-spacing](docs/rules/jsx-child-element-spacing.md): Ensures inline tags are not rendered without spaces between them
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* [react/jsx-closing-bracket-location](docs/rules/jsx-closing-bracket-location.md): Validate closing bracket location in JSX (fixable)
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* [react/jsx-closing-tag-location](docs/rules/jsx-closing-tag-location.md): Validate closing tag location for multiline JSX (fixable)
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* [react/jsx-curly-brace-presence](docs/rules/jsx-curly-brace-presence.md): Disallow unnecessary JSX expressions when literals alone are sufficient or enfore JSX expressions on literals in JSX children or attributes (fixable)
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* [react/jsx-curly-newline](docs/rules/jsx-curly-newline.md): Enforce consistent line breaks inside jsx curly (fixable)
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* [react/jsx-curly-spacing](docs/rules/jsx-curly-spacing.md): Enforce or disallow spaces inside of curly braces in JSX attributes (fixable)
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* [react/jsx-equals-spacing](docs/rules/jsx-equals-spacing.md): Disallow or enforce spaces around equal signs in JSX attributes (fixable)
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* [react/jsx-filename-extension](docs/rules/jsx-filename-extension.md): Restrict file extensions that may contain JSX
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* [react/jsx-first-prop-new-line](docs/rules/jsx-first-prop-new-line.md): Ensure proper position of the first property in JSX (fixable)
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* [react/jsx-fragments](docs/rules/jsx-fragments.md): Enforce shorthand or standard form for React fragments (fixable)
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* [react/jsx-handler-names](docs/rules/jsx-handler-names.md): Enforce event handler naming conventions in JSX
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* [react/jsx-indent](docs/rules/jsx-indent.md): Validate JSX indentation (fixable)
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* [react/jsx-indent-props](docs/rules/jsx-indent-props.md): Validate props indentation in JSX (fixable)
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* [react/jsx-key](docs/rules/jsx-key.md): Report missing `key` props in iterators/collection literals
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* [react/jsx-max-depth](docs/rules/jsx-max-depth.md): Validate JSX maximum depth
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* [react/jsx-max-props-per-line](docs/rules/jsx-max-props-per-line.md): Limit maximum of props on a single line in JSX (fixable)
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* [react/jsx-no-bind](docs/rules/jsx-no-bind.md): Prevents usage of Function.prototype.bind and arrow functions in React component props
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* [react/jsx-no-comment-textnodes](docs/rules/jsx-no-comment-textnodes.md): Comments inside children section of tag should be placed inside braces
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* [react/jsx-no-duplicate-props](docs/rules/jsx-no-duplicate-props.md): Enforce no duplicate props
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* [react/jsx-no-literals](docs/rules/jsx-no-literals.md): Prevent using string literals in React component definition
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* [react/jsx-no-script-url](docs/rules/jsx-no-script-url.md): Forbid `javascript:` URLs
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* [react/jsx-no-target-blank](docs/rules/jsx-no-target-blank.md): Forbid target="_blank" attribute without rel="noopener noreferrer"
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* [react/jsx-no-undef](docs/rules/jsx-no-undef.md): Disallow undeclared variables in JSX
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* [react/jsx-no-useless-fragment](docs/rules/jsx-no-useless-fragment.md): Disallow unnecessary fragments (fixable)
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* [react/jsx-one-expression-per-line](docs/rules/jsx-one-expression-per-line.md): Limit to one expression per line in JSX (fixable)
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* [react/jsx-pascal-case](docs/rules/jsx-pascal-case.md): Enforce PascalCase for user-defined JSX components
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* [react/jsx-props-no-multi-spaces](docs/rules/jsx-props-no-multi-spaces.md): Disallow multiple spaces between inline JSX props (fixable)
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* [react/jsx-props-no-spreading](docs/rules/jsx-props-no-spreading.md): Prevent JSX prop spreading
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* [react/jsx-sort-default-props](docs/rules/jsx-sort-default-props.md): Enforce default props alphabetical sorting
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* [react/jsx-sort-props](docs/rules/jsx-sort-props.md): Enforce props alphabetical sorting (fixable)
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* [react/jsx-space-before-closing](docs/rules/jsx-space-before-closing.md): Validate spacing before closing bracket in JSX (fixable)
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* [react/jsx-tag-spacing](docs/rules/jsx-tag-spacing.md): Validate whitespace in and around the JSX opening and closing brackets (fixable)
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* [react/jsx-uses-react](docs/rules/jsx-uses-react.md): Prevent React to be marked as unused
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* [react/jsx-uses-vars](docs/rules/jsx-uses-vars.md): Prevent variables used in JSX to be marked as unused
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* [react/jsx-wrap-multilines](docs/rules/jsx-wrap-multilines.md): Prevent missing parentheses around multilines JSX (fixable)
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<!-- AUTO-GENERATED-CONTENT:END -->
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## Other useful plugins
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- JSX accessibility: [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y)
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- React Native: [eslint-plugin-react-native](https://github.com/Intellicode/eslint-plugin-react-native)
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# Shareable configurations
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## Recommended
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This plugin exports a `recommended` configuration that enforces React good practices.
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To enable this configuration use the `extends` property in your `.eslintrc` config file:
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```json
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{
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"extends": ["eslint:recommended", "plugin:react/recommended"]
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}
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```
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See [ESLint documentation](http://eslint.org/docs/user-guide/configuring#extending-configuration-files) for more information about extending configuration files.
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The rules enabled in this configuration are:
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* [react/display-name](docs/rules/display-name.md)
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* [react/jsx-key](docs/rules/jsx-key.md)
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* [react/jsx-no-comment-textnodes](docs/rules/jsx-no-comment-textnodes.md)
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* [react/jsx-no-duplicate-props](docs/rules/jsx-no-duplicate-props.md)
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* [react/jsx-no-target-blank](docs/rules/jsx-no-target-blank.md)
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* [react/jsx-no-undef](docs/rules/jsx-no-undef.md)
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* [react/jsx-uses-react](docs/rules/jsx-uses-react.md)
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* [react/jsx-uses-vars](docs/rules/jsx-uses-vars.md)
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* [react/no-children-prop](docs/rules/no-children-prop.md)
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* [react/no-danger-with-children](docs/rules/no-danger-with-children.md)
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* [react/no-deprecated](docs/rules/no-deprecated.md)
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* [react/no-direct-mutation-state](docs/rules/no-direct-mutation-state.md)
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* [react/no-find-dom-node](docs/rules/no-find-dom-node.md)
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* [react/no-is-mounted](docs/rules/no-is-mounted.md)
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* [react/no-render-return-value](docs/rules/no-render-return-value.md)
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* [react/no-string-refs](docs/rules/no-string-refs.md)
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* [react/no-unescaped-entities](docs/rules/no-unescaped-entities.md)
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* [react/no-unknown-property](docs/rules/no-unknown-property.md)
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* [react/prop-types](docs/rules/prop-types.md)
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* [react/react-in-jsx-scope](docs/rules/react-in-jsx-scope.md)
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* [react/require-render-return](docs/rules/require-render-return.md)
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## All
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This plugin also exports an `all` configuration that includes every available rule.
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This pairs well with the `eslint:all` rule.
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```json
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{
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"plugins": [
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"react"
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],
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"extends": ["eslint:all", "plugin:react/all"]
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}
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```
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**Note**: These configurations will import `eslint-plugin-react` and enable JSX in [parser options](http://eslint.org/docs/user-guide/configuring#specifying-parser-options).
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# License
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ESLint-plugin-React is licensed under the [MIT License](http://www.opensource.org/licenses/mit-license.php).
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[npm-url]: https://npmjs.org/package/eslint-plugin-react
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[npm-image]: https://img.shields.io/npm/v/eslint-plugin-react.svg
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[travis-url]: https://travis-ci.org/yannickcr/eslint-plugin-react
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[travis-image]: https://img.shields.io/travis/yannickcr/eslint-plugin-react/master.svg
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[deps-url]: https://david-dm.org/yannickcr/eslint-plugin-react
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[deps-image]: https://img.shields.io/david/dev/yannickcr/eslint-plugin-react.svg
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[coverage-url]: https://coveralls.io/r/yannickcr/eslint-plugin-react?branch=master
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[coverage-image]: https://img.shields.io/coveralls/yannickcr/eslint-plugin-react/master.svg
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[climate-url]: https://codeclimate.com/github/yannickcr/eslint-plugin-react
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[climate-image]: https://img.shields.io/codeclimate/maintainability/yannickcr/eslint-plugin-react.svg
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[status-url]: https://github.com/yannickcr/eslint-plugin-react/pulse
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[status-image]: https://img.shields.io/github/last-commit/yannickcr/eslint-plugin-react.svg
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[tidelift-url]: https://tidelift.com/subscription/pkg/npm-eslint-plugin-react?utm_source=npm-eslint-plugin-react&utm_medium=referral&utm_campaign=readme
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[tidelift-image]: https://tidelift.com/badges/github/yannickcr/eslint-plugin-react?style=flat
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