Function reconcileSinglePortal

lib/assets/react-source/development/react.js:17936–17963

(returnFiber, currentFirstChild, portal, expirationTime)

	  }

	  function reconcileSinglePortal(returnFiber, currentFirstChild, portal, expirationTime) {
	    var key = portal.key;
	    var child = currentFirstChild;

	    while (child !== null) {
	      // TODO: If key === null and child.key === null, then this only applies to
	      // the first item in the list.
	      if (child.key === key) {
	        if (child.tag === HostPortal && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {
	          deleteRemainingChildren(returnFiber, child.sibling);
	          var existing = useFiber(child, portal.children || []);
	          existing.return = returnFiber;
	          return existing;
	        } else {
	          deleteRemainingChildren(returnFiber, child);
	          break;
	        }
	      } else {
	        deleteChild(returnFiber, child);
	      }

	      child = child.sibling;
	    }

	    var created = createFiberFromPortal(portal, returnFiber.mode, expirationTime);
	    created.return = returnFiber;
	    return created;
	  } // This API will tag the children with the side-effect of the reconciliation
	  // itself. They will be added to the side-effect list as we pass through the
	  // children and the parent.