Javascript OpenLayers before zoom event listener

Question

I am trying to set up OpenLayers to not display the vector layer just before a zoom starts and make it reappear after a zoom ends. I have the zoom ends part already established

Answer 1

Solution of "Shaunak" is worked very well for me. I want to restrict zooming below 11 so edited his code as

if (zoom > 11) {
    map.zoomToProxy(zoom, xy);
}