eslint-plugin-react-19-upgrade

An ESLint plugin to identify and fix breaking changes when upgrading React 18 to React 19

Installation

You'll first need to install ESLint:

``
$ npm install eslint --save-dev
`

Next, install eslint-plugin-react-19-upgrade:

`
$ npm install eslint-plugin-react-19-upgrade --save-dev
`

Usage

Add react-19-upgrade to the plugins section of your .eslintrc or equivalent configuration file. You can omit the eslint-plugin- prefix:

`json
{
"plugins": ["react-19-upgrade"]
}
`

Then configure the rules you want to use under the rules section.

`json
{
"rules": {
"react-19-upgrade/no-default-props": "error",
"react-19-upgrade/no-prop-types": "warn",
"react-19-upgrade/no-legacy-context": "error",
"react-19-upgrade/no-string-refs": "error",
"react-19-upgrade/no-factories": "error"
}
}
`

Supported Rules

- no-default-props: Move defaultProps to default parameters in the destructured props. Fixable by ESLint.
- no-prop-types: Avoid using propTypes as they are now ignored in React 19.
- no-legacy-context: Disallow the use of legacy context APIs in React class components.
- no-string-refs: Disallow the use of string refs in React components.
- no-factories`: Disallow module pattern factories and React.createFactory.