How to use the ssr-window.document.activeElement function in ssr-window

const swiper = this;
    const { rtlTranslate: rtl } = swiper;
    let e = event;
    if (e.originalEvent) e = e.originalEvent; // jquery fix
    const kc = e.keyCode || e.charCode;
    // Directions locks
    if (!swiper.allowSlideNext && ((swiper.isHorizontal() && kc === 39) || (swiper.isVertical() && kc === 40))) {
      return false;
    }
    if (!swiper.allowSlidePrev && ((swiper.isHorizontal() && kc === 37) || (swiper.isVertical() && kc === 38))) {
      return false;
    }
    if (e.shiftKey || e.altKey || e.ctrlKey || e.metaKey) {
      return undefined;
    }
    if (document.activeElement && document.activeElement.nodeName && (document.activeElement.nodeName.toLowerCase() === 'input' || document.activeElement.nodeName.toLowerCase() === 'textarea')) {
      return undefined;
    }
    if (swiper.params.keyboard.onlyInViewport && (kc === 37 || kc === 39 || kc === 38 || kc === 40)) {
      let inView = false;
      // Check that swiper should be inside of visible area of window
      if (swiper.$el.parents(`.${swiper.params.slideClass}`).length > 0 && swiper.$el.parents(`.${swiper.params.slideActiveClass}`).length === 0) {
        return undefined;
      }
      const windowWidth = window.innerWidth;
      const windowHeight = window.innerHeight;
      const swiperOffset = swiper.$el.offset();
      if (rtl) swiperOffset.left -= swiper.$el[0].scrollLeft;
      const swiperCoord = [
        [swiperOffset.left, swiperOffset.top],
        [swiperOffset.left + swiper.width, swiperOffset.top],
        [swiperOffset.left, swiperOffset.top + swiper.height],

function androidNeedsBlur(el) {
    const noBlur = ('button input textarea select').split(' ');
    if (document.activeElement && el !== document.activeElement && document.activeElement !== document.body) {
      if (noBlur.indexOf(el.nodeName.toLowerCase()) >= 0) {
        return false;
      }
      return true;
    }
    return false;
  }
  function targetNeedsFastClick(el) {

isScrolling: undefined,
    startMoving: undefined,
  });

  touches.startX = startX;
  touches.startY = startY;
  data.touchStartTime = Utils.now();
  swiper.allowClick = true;
  swiper.updateSize();
  swiper.swipeDirection = undefined;
  if (params.threshold > 0) data.allowThresholdMove = false;
  if (e.type !== 'touchstart') {
    let preventDefault = true;
    if ($targetEl.is(data.formElements)) preventDefault = false;
    if (
      document.activeElement
      && $(document.activeElement).is(data.formElements)
      && document.activeElement !== $targetEl[0]
    ) {
      document.activeElement.blur();
    }

    const shouldPreventDefault = preventDefault && swiper.allowTouchMove && params.touchStartPreventDefault;
    if (params.touchStartForcePreventDefault || shouldPreventDefault) {
      e.preventDefault();
    }
  }
  swiper.emit('touchStart', e);
}

sb.$pageEl.find('.page-content').addClass('with-searchbar-expandable-enabled');
        }
        if (app.theme === 'md' && sb.$el.parents('.navbar').length) {
          sb.$el.parents('.navbar').addClass('with-searchbar-expandable-enabled');
        } else {
          sb.$el.parents('.navbar').addClass('with-searchbar-expandable-enabled');
          sb.$el.parents('.navbar-large').addClass('navbar-large-collapsed');
        }
      }
      if (sb.$hideOnEnableEl) sb.$hideOnEnableEl.addClass('hidden-by-searchbar');
      sb.$el.trigger('searchbar:enable');
      sb.emit('local::enable searchbarEnable', sb);
    }
    let needsFocus = false;
    if (setFocus === true) {
      if (document.activeElement !== sb.inputEl) {
        needsFocus = true;
      }
    }
    const isIos = app.device.ios && app.theme === 'ios';
    if (isIos) {
      if (sb.expandable) {
        if (needsFocus) sb.$inputEl.focus();
        enable();
      } else {
        if (needsFocus) sb.$inputEl.focus();
        if (setFocus && (setFocus.type === 'focus' || setFocus === true)) {
          Utils.nextTick(() => {
            enable();
          }, 400);
        } else {
          enable();

if (
        (pageY < touches.startY && swiper.translate <= swiper.maxTranslate())
        || (pageY > touches.startY && swiper.translate >= swiper.minTranslate())
      ) {
        data.isTouched = false;
        data.isMoved = false;
        return;
      }
    } else if (
      (pageX < touches.startX && swiper.translate <= swiper.maxTranslate())
      || (pageX > touches.startX && swiper.translate >= swiper.minTranslate())
    ) {
      return;
    }
  }
  if (data.isTouchEvent && document.activeElement) {
    if (e.target === document.activeElement && $(e.target).is(data.formElements)) {
      data.isMoved = true;
      swiper.allowClick = false;
      return;
    }
  }
  if (data.allowTouchCallbacks) {
    swiper.emit('touchMove', e);
  }
  if (e.targetTouches && e.targetTouches.length > 1) return;

  touches.currentX = pageX;
  touches.currentY = pageY;

  const diffX = touches.currentX - touches.startX;
  const diffY = touches.currentY - touches.startY;

onBlur() {
    const self = this;
    if (self.params.placeholder && self.$contentEl.html() === '') {
      self.insertPlaceholder();
    }
    if (self.params.mode === 'popover') {
      const selection = window.getSelection();
      const selectionIsInContent = $(selection.anchorNode).parents(self.contentEl).length || selection.anchorNode === self.contentEl;
      const inPopover = document.activeElement && self.popover && $(document.activeElement).closest(self.popover.$el).length;
      if (!inPopover && !selectionIsInContent) {
        self.closePopover();
      }
    }
    if (self.params.mode === 'keyboard-toolbar') {
      const selection = window.getSelection();
      const selectionIsInContent = $(selection.anchorNode).parents(self.contentEl).length || selection.anchorNode === self.contentEl;
      if (!selectionIsInContent) {
        self.closeKeyboardToolbar();
      }
    }
    self.$el.trigger('texteditor:blur');
    self.emit('local::blur textEditorBlur', self);
  }

buttons.forEach((button, index) => {
        if (button.keyCodes && button.keyCodes.indexOf(keyCode) >= 0) {
          if (document.activeElement) document.activeElement.blur();
          if (button.onClick) button.onClick(dialog, e);
          if (dialog.params.onClick) dialog.params.onClick(dialog, index);
          if (button.close !== false) dialog.close();
        }
      });
    }

$(window).once('resize', () => {
            if (document && document.activeElement === inputEl) {
              app.input.scrollIntoView(inputEl, app.params.input.scrollIntoViewDuration, app.params.input.scrollIntoViewCentered, app.params.input.scrollIntoViewAlways);
            }
          });
        } else {