Function reconcileSinglePortal

docs/external/js/react-dom.development.js:14376–14403

(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.