Function updateElement

docs/external/js/react-dom.development.js:13696–13719

(returnFiber, current, element, expirationTime)

    }

    function updateElement(returnFiber, current, element, expirationTime) {
      if (current !== null) {
        if (current.elementType === element.type || ( // Keep this check inline so it only runs on the false path:
         isCompatibleFamilyForHotReloading(current, element) )) {
          // Move based on index
          var existing = useFiber(current, element.props);
          existing.ref = coerceRef(returnFiber, current, element);
          existing.return = returnFiber;

          {
            existing._debugSource = element._source;
            existing._debugOwner = element._owner;
          }

          return existing;
        }
      } // Insert


      var created = createFiberFromElement(element, returnFiber.mode, expirationTime);
      created.ref = coerceRef(returnFiber, current, element);
      created.return = returnFiber;
      return created;
    }

    function updatePortal(returnFiber, current, portal, expirationTime) {
      if (current === null || current.tag !== HostPortal || current.stateNode.containerInfo !== portal.containerInfo || current.stateNode.implementation !== portal.implementation) {