Function pushDispatcher

packages/react-reconciler/src/ReactFiberWorkLoop.js:2398–2409

(container: any)

}

function pushDispatcher(container: any) {
  const prevDispatcher = ReactSharedInternals.H;
  ReactSharedInternals.H = ContextOnlyDispatcher;
  if (prevDispatcher === null) {
    // The React isomorphic package does not include a default dispatcher.
    // Instead the first renderer will lazily attach one, in order to give
    // nicer error messages.
    return ContextOnlyDispatcher;
  } else {
    return prevDispatcher;
  }
}

function popDispatcher(prevDispatcher: any) {
  ReactSharedInternals.H = prevDispatcher;