Function updateHostText

packages/react-reconciler/src/ReactFiberCompleteWork.js:662–689

(
  current: Fiber,
  workInProgress: Fiber,
  oldText: string,
  newText: string,
)

}

function updateHostText(
  current: Fiber,
  workInProgress: Fiber,
  oldText: string,
  newText: string,
) {
  if (supportsMutation) {
    // If the text differs, mark it as an update. All the work in done in commitWork.
    if (oldText !== newText) {
      markUpdate(workInProgress);
    }
  } else if (supportsPersistence) {
    if (oldText !== newText) {
      // If the text content differs, we'll create a new text instance for it.
      const rootContainerInstance = getRootHostContainer();
      const currentHostContext = getHostContext();
      markCloned(workInProgress);
      workInProgress.stateNode = createTextInstance(
        newText,
        rootContainerInstance,
        currentHostContext,
        workInProgress,
      );
    } else {
      workInProgress.stateNode = current.stateNode;
    }
  }
}

function cutOffTailIfNeeded(
  renderState: SuspenseListRenderState,