eslint-plugin-react-x

Core rules (DOM Irrelevant, Render Target Agnostic, Formatting Independent).

[!TIP] This plugin is already included in @eslint-react/eslint-plugin. You don't need to install it separately if you are using @eslint-react/eslint-plugin.

Install

# npm
npm install --save-dev eslint-plugin-react-x

Setup

Add the plugin to your eslint.config.js:

// @ts-check

import js from "@eslint/js";
import reactx from "eslint-plugin-react-x";

export default [
  js.configs.recommended,
  {
    files: ["**/*.{ts,tsx}"],
    plugins: [
      "react-x": reactx,
      rules: {
        // react-x recommended rules
        "react-x/ensure-forward-ref-using-ref": "warn",
        "react-x/no-access-state-in-setstate": "error",
        "react-x/no-array-index-key": "warn",
        "react-x/no-children-count": "warn",
        "react-x/no-children-for-each": "warn",
        "react-x/no-children-map": "warn",
        "react-x/no-children-only": "warn",
        "react-x/no-children-to-array": "warn",
        "react-x/no-clone-element": "warn",
        "react-x/no-comment-textnodes": "warn",
        "react-x/no-component-will-mount": "error",
        "react-x/no-component-will-receive-props": "error",
        "react-x/no-component-will-update": "error",
        "react-x/no-create-ref": "error",
        "react-x/no-default-props": "error",
        "react-x/no-direct-mutation-state": "error",
        "react-x/no-duplicate-key": "error",
        "react-x/no-missing-key": "error",
        "react-x/no-nested-components": "warn",
        "react-x/no-prop-types": "error",
        "react-x/no-redundant-should-component-update": "error",
        "react-x/no-set-state-in-component-did-mount": "warn",
        "react-x/no-set-state-in-component-did-update": "warn",
        "react-x/no-set-state-in-component-will-update": "warn",
        "react-x/no-string-refs": "error",
        "react-x/no-unsafe-component-will-mount": "warn",
        "react-x/no-unsafe-component-will-receive-props": "warn",
        "react-x/no-unsafe-component-will-update": "warn",
        "react-x/no-unstable-context-value": "error",
        "react-x/no-unstable-default-props": "error",
        "react-x/no-unused-class-component-members": "warn",
        "react-x/no-unused-state": "warn",
        "react-x/no-useless-fragment": "warn",
      }
    ],
  },
];

Rules

Rule	Description	💼	💭
`avoid-shorthand-boolean`	Enforces the use of shorthand syntax for boolean attributes.	🎨
`avoid-shorthand-fragment`	Enforces the use of shorthand syntax for fragments.	🎨
`ensure-forward-ref-using-ref`	Requires that components wrapped with `forwardRef` must have a `ref` parameter.	✔️
`no-access-state-in-setstate`	Prevents accessing `this.state` inside `setState` calls.	✔️
`no-array-index-key`	Warns when an array `index` is used as a `key` prop.	👀
`no-children-count`	Prevents usage of `Children.count`.	⛔
`no-children-for-each`	Prevents usage of `Children.forEach`.	⛔
`no-children-map`	Prevents usage of `Children.map`.	⛔
`no-children-only`	Prevents usage of `Children.only`.	⛔
`no-children-prop`	Prevents usage of `children` as a prop.	⛔
`no-children-to-array`	Prevents usage of `Children.toArray`.	⛔
`no-class-component`	Prevents usage of class component.	⛔
`no-clone-element`	Prevents usage of `cloneElement`.	⛔
`no-comment-textnodes`	Prevents comments from being inserted as text nodes.	👀
`no-component-will-mount`	Prevents usage of `componentWillMount`.	⛔
`no-component-will-receive-props`	Prevents usage of `componentWillReceiveProps`.	⛔
`no-component-will-update`	Prevents usage of `componentWillUpdate`.	⛔
`no-create-ref`	Prevents usage of `createRef`.	⛔
`no-direct-mutation-state`	Prevents direct mutation of `this.state`.	✔️
`no-duplicate-key`	Prevents duplicate `key` props on elements in the same array or a list of `children`.	✔️
`no-leaked-conditional-rendering`	Prevents problematic leaked values from being rendered.	👀	💭
`no-missing-component-display-name`	Enforces that all components have a `displayName` which can be used in devtools.	🐞
`no-missing-key`	Prevents missing `key` prop on items in list rendering.	✔️
`no-nested-components`	Prevents nesting component definitions inside other components.	✔️
`no-redundant-should-component-update`	Prevents usage of `shouldComponentUpdate` when extending `React.PureComponent`.	✔️
`no-set-state-in-component-did-mount`	Disallows calling `this.setState` in `componentDidMount` outside of functions, such as callbacks.	👀
`no-set-state-in-component-did-update`	Disallows calling `this.setState` in `componentDidUpdate` outside of functions, such as callbacks.	👀
`no-set-state-in-component-will-update`	Disallows calling `this.setState` in `componentWillUpdate` outside of functions, such as callbacks.	👀
`no-string-refs`	Disallows using deprecated string `refs`.	⛔
`no-unsafe-component-will-mount`	Warns usage of `UNSAFE_componentWillMount` in class components.	👀
`no-unsafe-component-will-receive-props`	Warns usage of `UNSAFE_componentWillReceiveProps` in class components.	👀
`no-unsafe-component-will-update`	Warns usage of `UNSAFE_componentWillUpdate` in class components.	👀
`no-unstable-context-value`	Prevents non-stable values (i.e. object literals) from being used as a value for `Context.Provider`.	🚀
`no-unstable-default-props`	Prevents usage of referential-type values as default props in object destructuring.	🚀
`no-unused-class-component-members`	Warns unused class component methods and properties.	✔️
`no-unused-state`	Warns unused class component state.	✔️
`no-useless-fragment`	Prevents the use of useless `fragment` components or `<>` syntax.	✔️
`prefer-read-only-props`	Enforces that function components props are readonly.	✔️	💭
`prefer-destructuring-assignment`	Enforces the use of destructuring assignment over property assignment.	🎨
`prefer-shorthand-boolean`	Enforces the use of shorthand syntax for boolean attributes.	🎨
`prefer-shorthand-fragment`	Enforces the use of shorthand syntax for fragments.	🎨