Receive previous state in getDerivedStateFromError

Do you want to request a feature or report a bug?

This is feature request.

What is the current behavior?

getDerivedStateFromError hook receives error and doesn't have access to state or component instance. This limits possible ways in which it could be used and requires to additionally use other hooks to derive the state:

class App extends Component {
  state = {}

  static getDerivedStateFromError(error) {
    return { error }
  }

  static getDerivedStateFromProps(props, state) {
    // do we really need this?
    // the state is derived from error, not props
    if (state.error)
      return remapStateToPreferredStructure(state);
  }

  render() { /* ... */ }
}

What is the expected behavior?

getDerivedStateFromError is expected to receive previous state and have

getDerivedStateFromError(error, state)

signature to be consistent with related static hook, getDerivedStateFromProps. This getDerivedStateFromError signature is backward compatible with existing one (React 16.6.0).

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?

React 16.6.0

Inizia dal punto di ingresso getDerivedStateFromError e confrontalo con l’hook correlato getDerivedStateFromProps. Valuta l’argomento richiesto relativo allo stato precedente rispetto alla firma esistente con un argomento; il lavoro è concluso quando il comportamento dell’API e le implicazioni di compatibilità sono chiaramente stabiliti.