Function attachPatchData

packages/core/src/render3/context_discovery.ts:191–202

(target: any, data: LView | LContext)

 * directive or DOM node instance) using monkey-patching.
 */
export function attachPatchData(target: any, data: LView | LContext) {
  ngDevMode && assertDefined(target, 'Target expected');
  // Only attach the ID of the view in order to avoid memory leaks (see #41047). We only do this
  // for `LView`, because we have control over when an `LView` is created and destroyed, whereas
  // we can't know when to remove an `LContext`.
  if (isLView(data)) {
    target[MONKEY_PATCH_KEY_NAME] = data[ID];
    registerLView(data);
  } else {
    target[MONKEY_PATCH_KEY_NAME] = data;
  }
}

/**
 * Returns the monkey-patch value data present on the target (which could be