Function mountLazyComponent

packages/react-reconciler/src/ReactFiberBeginWork.js:2077–2168

(
  _current: null | Fiber,
  workInProgress: Fiber,
  elementType: any,
  renderLanes: Lanes,
)

}

function mountLazyComponent(
  _current: null | Fiber,
  workInProgress: Fiber,
  elementType: any,
  renderLanes: Lanes,
) {
  resetSuspendedCurrentOnMountInLegacyMode(_current, workInProgress);

  const props = workInProgress.pendingProps;
  const lazyComponent: LazyComponentType<any, any> = elementType;
  let Component = resolveLazy(lazyComponent);
  // Store the unwrapped component in the type.
  workInProgress.type = Component;

  if (typeof Component === 'function') {
    if (isFunctionClassComponent(Component)) {
      const resolvedProps = resolveClassComponentProps(Component, props);
      workInProgress.tag = ClassComponent;
      if (__DEV__) {
        workInProgress.type = Component =
          resolveClassForHotReloading(Component);
      }
      return updateClassComponent(
        null,
        workInProgress,
        Component,
        resolvedProps,
        renderLanes,
      );
    } else {
      workInProgress.tag = FunctionComponent;
      if (__DEV__) {
        validateFunctionComponentInDev(workInProgress, Component);
        workInProgress.type = Component =
          resolveFunctionForHotReloading(Component);
      }
      return updateFunctionComponent(
        null,
        workInProgress,
        Component,
        props,
        renderLanes,
      );
    }
  } else if (Component !== undefined && Component !== null) {
    const $$typeof = Component.$$typeof;
    if ($$typeof === REACT_FORWARD_REF_TYPE) {
      workInProgress.tag = ForwardRef;
      if (__DEV__) {
        workInProgress.type = Component =
          resolveForwardRefForHotReloading(Component);
      }
      return updateForwardRef(
        null,
        workInProgress,
        Component,
        props,
        renderLanes,