How to change height div on window resize?

Question

I have a div on my website that should be the height of the window. This is what i got:

    $(document).ready(function() {
    var bodyheight = $(document).h         


        

Answer 1

$(document).ready(function() 
{

     $(window).on("resize",function() {

          var bodyheight = $(document).height();

          $("#sidebar").height(bodyheight);
     });

});