Function traverseNextElement

packages/core/src/render3/context_discovery.ts:247–261

* Locates the next tNode (child, sibling or parent).

(tNode: TNode)

 * Locates the next tNode (child, sibling or parent).
 */
function traverseNextElement(tNode: TNode): TNode | null {
  if (tNode.child) {
    return tNode.child;
  } else if (tNode.next) {
    return tNode.next;
  } else {
    // Let's take the following template: <div><span>text</span></div><component/>
    // After checking the text node, we need to find the next parent that has a "next" TNode,
    // in this case the parent `div`, so that we can find the component.
    while (tNode.parent && !tNode.parent.next) {
      tNode = tNode.parent;
    }
    return tNode.parent && tNode.parent.next;
  }
}

/**
 * Locates the component within the given LView and returns the matching index