Function renderNodeDestructive

packages/react-server/src/ReactFizzServer.js:3290–3318

(
  request: Request,
  task: Task,
  node: ReactNodeList,
  childIndex: number,
)

// This function by it self renders a node and consumes the task by mutating it
// to update the current execution state.
function renderNodeDestructive(
  request: Request,
  task: Task,
  node: ReactNodeList,
  childIndex: number,
): void {
  if (task.replay !== null && typeof task.replay.slots === 'number') {
    // TODO: Figure out a cheaper place than this hot path to do this check.
    const resumeSegmentID = task.replay.slots;
    resumeNode(request, task, resumeSegmentID, node, childIndex);
    return;
  }
  // Stash the node we're working on. We'll pick up from this task in case
  // something suspends.
  task.node = node;
  task.childIndex = childIndex;

  const previousComponentStack = task.componentStack;
  const previousDebugTask = __DEV__ ? task.debugTask : null;

  pushComponentStack(task);

  retryNode(request, task);

  task.componentStack = previousComponentStack;
  if (__DEV__) {
    task.debugTask = previousDebugTask;
  }
}

function retryNode(request: Request, task: Task): void {
  const node = task.node;