revert() {
    tick(this, 0, 1, 0, tickModes.AUTO);
    const ap = /** @type {ScrollObserver} */(this._autoplay);
    if (ap && ap.linked && ap.linked === this) ap.revert();
    return this.cancel();
  }
Cancels the timer by seeking it back to 0 and reverting the attached scroller if necessary
@return {this}