Function flushSyncWork

packages/react-reconciler/src/ReactFiberWorkLoop.js:1857–1863

()

// If called outside of a render or commit will flush all sync work on all roots
// Returns whether the the call was during a render or not
export function flushSyncWork(): boolean {
  if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
    flushSyncWorkOnAllRoots();
    return false;
  }
  return true;
}

export function isAlreadyRendering(): boolean {
  // Used by the renderer to print a warning if certain APIs are called from