Function isActive

packages/router/src/url_tree.ts:119–132

(
  url: string | UrlTree,
  router: Router,
  matchOptions?: Partial<IsActiveMatchOptions>,
)

 * @publicApi 21.1
 */
export function isActive(
  url: string | UrlTree,
  router: Router,
  matchOptions?: Partial<IsActiveMatchOptions>,
): Signal<boolean> {
  const urlTree = url instanceof UrlTree ? url : router.parseUrl(url);
  return computed(() =>
    containsTree(
      router.lastSuccessfulNavigation()?.finalUrl ?? new UrlTree(),
      urlTree,
      matchOptions,
    ),
  );
}

/**
 * Determines if a `UrlTree` is contained within another `UrlTree` based on the provided matching options.