facebook/react · error

measureClonedInstance is not implemented

Error message

measureClonedInstance is not implemented

What it means

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

Source

Thrown at packages/react-native-renderer/src/ReactFiberConfigFabricWithViewTransition.js:130

    console.warn('measureInstance is not implemented');
  }
  return {
    rect: {
      x: 0,
      y: 0,
      width: 0,
      height: 0,
    },
    abs: false,
    clip: false,
    // TODO: properly calculate whether instance is in viewport
    view: true,
  };
}

export function measureClonedInstance(instance: Instance): InstanceMeasurement {
  if (__DEV__) {
    console.warn('measureClonedInstance is not implemented');
  }
  return {
    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,

View on GitHub (pinned to eafeac097b)

When it happens

Trigger: Thrown at packages/react-native-renderer/src/ReactFiberConfigFabricWithViewTransition.js:130 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/ce9461b85ba77be7. Report an issue: GitHub.