facebook/react · error

hasInstanceChanged is not implemented

Error message

hasInstanceChanged is not implemented

What it means

Error "hasInstanceChanged is not implemented" thrown in facebook/react.

Source

Thrown at packages/react-native-renderer/src/ReactFiberConfigFabricWithViewTransition.js:151

    rect: {x: 0, y: 0, width: 0, height: 0},
    abs: false,
    clip: false,
    view: true,
  };
}

export function wasInstanceInViewport(
  measurement: InstanceMeasurement,
): boolean {
  return measurement.view;
}

export function hasInstanceChanged(
  oldMeasurement: InstanceMeasurement,
  newMeasurement: InstanceMeasurement,
): boolean {
  if (__DEV__) {
    console.warn('hasInstanceChanged is not implemented');
  }
  return false;
}

export function hasInstanceAffectedParent(
  oldMeasurement: InstanceMeasurement,
  newMeasurement: InstanceMeasurement,
): boolean {
  if (__DEV__) {
    console.warn('hasInstanceAffectedParent is not implemented');
  }
  return false;
}

export function startGestureTransition(
  suspendedState: null | SuspendedState,
  rootContainer: Container,
  timeline: GestureTimeline,

View on GitHub (pinned to eafeac097b)

When it happens

Trigger: Thrown at packages/react-native-renderer/src/ReactFiberConfigFabricWithViewTransition.js:151 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of facebook/react@eafeac097b (2026-08-21). Data as JSON: /api/errors/3d073a5fa3de51e0. Report an issue: GitHub.