spatnav container 1(Document) > spatnav container 2 > spatnav container 3

      
        focusable.addEventListener('focus', function(e) {
          let spatnavContainer = e.target.getSpatialNavigationContainer();
          spatnavContainer.style.background = '#F0808099';
          spatnavContainer.style.outline = '5px red solid';
          console.log(spatnavContainer);
        });