eslint-plugin-react
Advanced tools
The eslint-plugin-react is a plugin for ESLint that provides linting utilities for React and JSX specific code. It helps developers adhere to best practices and avoid common pitfalls in React development.
JSX-specific rules
Enforces rules specific to JSX, such as ensuring that any variables used in JSX are defined and that React is in scope when using JSX.
"react/jsx-uses-react": "error", "react/jsx-uses-vars": "error"Hooks rules
Provides rules that enforce the correct usage of React Hooks, such as ensuring that hooks are called in the same order on every render and that dependencies are specified correctly for useEffect.
"react-hooks/rules-of-hooks": "error", "react-hooks/exhaustive-deps": "warn"Prop-types validation
Ensures that prop types are correctly defined and used within React components, helping to catch type-related bugs.
"react/prop-types": "error"Component lifecycle
Warns about usage of deprecated methods in React component lifecycle, encouraging developers to update to newer APIs.
"react/no-deprecated": "warn"Best practices
Encourages best practices by warning against common anti-patterns like using array indices as keys or mutating state directly.
"react/no-array-index-key": "warn", "react/no-direct-mutation-state": "error"Similar to eslint-plugin-react, eslint-plugin-vue provides linting rules specific to Vue.js framework. It helps enforce Vue-specific best practices and coding standards.
This plugin is similar to eslint-plugin-react but for Angular applications. It contains rules that enforce best practices and conventions in AngularJS projects.
While not specific to React, eslint-plugin-jsx-a11y works well with eslint-plugin-react to enforce accessibility practices in JSX elements.
This plugin is designed for Preact (a fast 3kB alternative to React with the same ES6 API) and provides linting rules tailored to Preact codebases.
React specific linting rules for ESLint
Install ESLint either locally or globally.
$ npm install eslint --save-dev
If you installed ESLint globally, 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"
"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 <a> for linking, eg. <Link to={ url } />
"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",
}
displayName in a React component definitionkey propssetState in componentDidMountsetState in componentDidUpdatethis.statefindDOMNodeisMountedshouldComponentUpdate when extending React.PureComponentReact.rendersetStateref attribute.this in stateless functional componentssetState in componentWillUpdateReact when using JSXshouldComponentUpdate method<img />, <br />) from receiving children.bind() and arrow functions in JSX propstarget='_blank'This plugin exports a recommended configuration that enforces React good practices.
To enable this configuration use the extends property in your .eslintrc config file:
{
"extends": ["eslint:recommended", "plugin:react/recommended"]
}
See ESLint documentation for more information about extending configuration files.
The rules enabled in this configuration are:
This plugin also exports an all configuration that includes every available rule.
This pairs well with the eslint:all rule.
{
"plugins": [
"react"
],
"extends": ["eslint:all", "plugin:react/all"]
}
Note: These configurations will import eslint-plugin-react and enable JSX in parser options.
ESLint-plugin-React is licensed under the MIT License.
FAQs
React specific linting rules for ESLint
We found that eslint-plugin-react demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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