Function pushContextProvider

code/styling/public/app.js:12426–12444

(workInProgress)

  }

  function pushContextProvider(workInProgress) {
    if (!isContextProvider(workInProgress)) {
      return false;
    }

    var instance = workInProgress.stateNode;
    // We push the context as early as possible to ensure stack integrity.
    // If the instance does not exist yet, we will push null at first,
    // and replace it on the stack later when invalidating the context.
    var memoizedMergedChildContext = instance && instance.__reactInternalMemoizedMergedChildContext || emptyObject;

    // Remember the parent context so we can merge with it later.
    // Inherit the parent's did-perform-work value to avoid inadvertently blocking updates.
    previousContext = contextStackCursor.current;
    push(contextStackCursor, memoizedMergedChildContext, workInProgress);
    push(didPerformWorkStackCursor, didPerformWorkStackCursor.current, workInProgress);

    return true;
  }

  function invalidateContextProvider(workInProgress, didChange) {
    var instance = workInProgress.stateNode;