/**
 * Use a generator so we can iterate and possibly break early.
 * @example
 *   // to operate like a regular array. This kinda nullifies generator benefits, but worth knowing if you need the whole array.
 *   const allActiveElements = [...activeElements()]
 *
 *   // Early return
 *   for (const activeElement of activeElements()) {
 *     if (<cond>) {
 *       break; // Break the loop, dont need to iterate over the whole array or store an array in memory!
 *     }
 *   }
 */
export declare function activeElements(activeElement?: Element | null): Generator<Element>;
export declare function getDeepestActiveElement(): Element | undefined;