code: function stripElement(element) {
    const tabIndexElementPosition = elementsWithMissingTabIndex.indexOf(element);
  
    if (tabIndexElementPosition !== -1) {
      element.tabIndex = -1;
      elementsWithMissingTabIndex.splice(tabIndexElementPosition, 1);
    }
  }
docs: Removes elements tabindex attributes
  @param {HTMLElement} element
  @private