Function getIdxOfMatchingSelector

packages/core/src/render3/queries/query.ts:328–338

* Iterates over local names for a given node and returns directive index * (or -1 if a local name points to an element). * * @param tNode static data of a node to check * @param selector selector to match * @returns directive index, -1 or null if a selector didn't match any of the local names

(tNode: TNode, selector: string)

 * @returns directive index, -1 or null if a selector didn't match any of the local names
 */
function getIdxOfMatchingSelector(tNode: TNode, selector: string): number | null {
  const localNames = tNode.localNames;
  if (localNames !== null) {
    for (let i = 0; i < localNames.length; i += 2) {
      if (localNames[i] === selector) {
        return localNames[i + 1] as number;
      }
    }
  }
  return null;
}

function createResultByTNodeType(tNode: TNode, currentView: LView): any {
  if (tNode.type & (TNodeType.AnyRNode | TNodeType.ElementContainer)) {