Function _addQueryMatch

packages/core/src/debug/debug_node.ts:610–640

* Match the current native node against the predicate. * * @param nativeNode the current native node * @param predicate the predicate to match * @param matches the list of positive matches * @param elementsOnly whether only elements should be searched * @param rootNativeNode the root native no

(
  nativeNode: any,
  predicate: Predicate<DebugElement> | Predicate<DebugNode>,
  matches: DebugElement[] | DebugNode[],
  elementsOnly: boolean,
  rootNativeNode: any,
)

 * @param rootNativeNode the root native node on which predicate should not be matched
 */
function _addQueryMatch(
  nativeNode: any,
  predicate: Predicate<DebugElement> | Predicate<DebugNode>,
  matches: DebugElement[] | DebugNode[],
  elementsOnly: boolean,
  rootNativeNode: any,
) {
  if (rootNativeNode !== nativeNode) {
    const debugNode = getDebugNode(nativeNode);
    if (!debugNode) {
      return;
    }
    // Type of the "predicate and "matches" array are set based on the value of
    // the "elementsOnly" parameter. TypeScript is not able to properly infer these
    // types with generics, so we manually cast the parameters accordingly.
    if (
      elementsOnly &&
      debugNode instanceof DebugElement &&
      predicate(debugNode) &&
      matches.indexOf(debugNode) === -1
    ) {
      matches.push(debugNode);
    } else if (
      !elementsOnly &&
      (predicate as Predicate<DebugNode>)(debugNode) &&
      (matches as DebugNode[]).indexOf(debugNode) === -1
    ) {
      (matches as DebugNode[]).push(debugNode);
    }
  }
}

/**
 * Match all the descendants of a DOM node against a predicate.