Function reconcileSingleTextNode

code/third-party/public/app.js:8767–8784

(returnFiber, currentFirstChild, textContent, expirationTime)

  }

  function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, expirationTime) {
    // There's no need to check for keys on text nodes since we don't have a
    // way to define them.
    if (currentFirstChild !== null && currentFirstChild.tag === HostText) {
      // We already have an existing node so let's just update it and delete
      // the rest.
      deleteRemainingChildren(returnFiber, currentFirstChild.sibling);
      var existing = useFiber(currentFirstChild, textContent, expirationTime);
      existing['return'] = returnFiber;
      return existing;
    }
    // The existing first child is not a text node so we need to create one
    // and delete the existing ones.
    deleteRemainingChildren(returnFiber, currentFirstChild);
    var created = createFiberFromText(textContent, returnFiber.mode, expirationTime);
    created['return'] = returnFiber;
    return created;
  }

  function reconcileSingleElement(returnFiber, currentFirstChild, element, expirationTime) {
    var key = element.key;