Function propagateContextChanges

docs/index.js:10596–10653

(
  workInProgress,
  contexts,
  renderLanes,
  forcePropagateEntireTree
)

  }
}
function propagateContextChanges(
  workInProgress,
  contexts,
  renderLanes,
  forcePropagateEntireTree
) {
  var fiber = workInProgress.child;
  null !== fiber && (fiber.return = workInProgress);
  for (; null !== fiber; ) {
    var list = fiber.dependencies;
    if (null !== list) {
      var nextFiber = fiber.child;
      list = list.firstContext;
      a: for (; null !== list; ) {
        var dependency = list;
        list = fiber;
        for (var i = 0; i < contexts.length; i++)
          if (dependency.context === contexts[i]) {
            list.lanes |= renderLanes;
            dependency = list.alternate;
            null !== dependency && (dependency.lanes |= renderLanes);
            scheduleContextWorkOnParentPath(
              list.return,
              renderLanes,
              workInProgress
            );
            forcePropagateEntireTree || (nextFiber = null);
            break a;
          }
        list = dependency.next;
      }
    } else if (18 === fiber.tag) {
      nextFiber = fiber.return;
      if (null === nextFiber) throw Error(formatProdErrorMessage(341));
      nextFiber.lanes |= renderLanes;
      list = nextFiber.alternate;
      null !== list && (list.lanes |= renderLanes);
      scheduleContextWorkOnParentPath(nextFiber, renderLanes, workInProgress);
      nextFiber = null;
    } else nextFiber = fiber.child;
    if (null !== nextFiber) nextFiber.return = fiber;
    else
      for (nextFiber = fiber; null !== nextFiber; ) {
        if (nextFiber === workInProgress) {
          nextFiber = null;
          break;
        }
        fiber = nextFiber.sibling;
        if (null !== fiber) {
          fiber.return = nextFiber.return;
          nextFiber = fiber;
          break;
        }
        nextFiber = nextFiber.return;
      }
    fiber = nextFiber;
  }
}