Method _scrollYPageWithAnimation

src/static/js/scroll.ts:235–247

(pixelsToScroll: number, durationOfAnimationToShowFocusline: number)

  };

  _scrollYPageWithAnimation(pixelsToScroll: number, durationOfAnimationToShowFocusline: number) {
      const outerDocBody = this.doc.getElementById('outerdocbody');

      // it works on later versions of Chrome
      const $outerDocBody = $(outerDocBody!);
      this._triggerScrollWithAnimation(
        $outerDocBody, pixelsToScroll, durationOfAnimationToShowFocusline);

      // it works on Firefox and earlier versions of Chrome
      const $outerDocBodyParent = $outerDocBody.parent();
      this._triggerScrollWithAnimation(
        $outerDocBodyParent, pixelsToScroll, durationOfAnimationToShowFocusline);
    };

  _triggerScrollWithAnimation($elem:any, pixelsToScroll: number, durationOfAnimationToShowFocusline: number) {
      // clear the queue of animation