Function createFiberFromElement

packages/react-reconciler/src/ReactFiber.js:718–744

(
  element: ReactElement,
  mode: TypeOfMode,
  lanes: Lanes,
)

}

export function createFiberFromElement(
  element: ReactElement,
  mode: TypeOfMode,
  lanes: Lanes,
): Fiber {
  let owner = null;
  if (__DEV__) {
    owner = element._owner;
  }
  const type = element.type;
  const key = element.key;
  const pendingProps = element.props;
  const fiber = createFiberFromTypeAndProps(
    type,
    key,
    pendingProps,
    owner,
    mode,
    lanes,
  );
  if (__DEV__) {
    fiber._debugOwner = element._owner;
    fiber._debugStack = element._debugStack;
    fiber._debugTask = element._debugTask;
  }
  return fiber;
}

export function createFiberFromFragment(
  elements: ReactFragment,