Function pushHostContainer

lib/assets/react-source/development/react.js:18113–18130

(fiber, nextRootInstance)

	}

	function pushHostContainer(fiber, nextRootInstance) {
	  // Push current root instance onto the stack;
	  // This allows us to reset root when portals are popped.
	  push(rootInstanceStackCursor, nextRootInstance, fiber); // Track the context and the Fiber that provided it.
	  // This enables us to pop only Fibers that provide unique contexts.

	  push(contextFiberStackCursor, fiber, fiber); // Finally, we need to push the host context to the stack.
	  // However, we can't just call getRootHostContext() and push it because
	  // we'd have a different number of entries on the stack depending on
	  // whether getRootHostContext() throws somewhere in renderer code or not.
	  // So we push an empty value first. This lets us safely unwind on errors.

	  push(contextStackCursor$1, NO_CONTEXT, fiber);
	  var nextRootContext = getRootHostContext(nextRootInstance); // Now that we know this function doesn't throw, replace it.

	  pop(contextStackCursor$1, fiber);
	  push(contextStackCursor$1, nextRootContext, fiber);
	}

	function popHostContainer(fiber) {
	  pop(contextStackCursor$1, fiber);