invokeLayoutEffectUnmountInDEV() — react Function Reference

Source Code

packages/react-reconciler/src/ReactFiberCommitWork.js lines 5304–5328

export function invokeLayoutEffectUnmountInDEV(fiber: Fiber): void {
  if (__DEV__) {
    // We don't need to re-check StrictEffectsMode here.
    // This function is only called if that check has already passed.
    switch (fiber.tag) {
      case FunctionComponent:
      case ForwardRef:
      case SimpleMemoComponent: {
        commitHookEffectListUnmount(
          HookLayout | HookHasEffect,
          fiber,
          fiber.return,
        );
        break;
      }
      case ClassComponent: {
        const instance = fiber.stateNode;
        if (typeof instance.componentWillUnmount === 'function') {
          safelyCallComponentWillUnmount(fiber, fiber.return, instance);
        }
        break;
      }
    }
  }
}