Resize div according to window size

resize.js

jQuery(window).resize(function(){
  resizeNav();
});

resizeNav();

function resizeNav(){
var windowWidth = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
  
  if(windowWidth < 767) {
  console.log('here');
      var w = windowWidth - 30;
      jQuery('.languageswitcherload .nav-child.dropdown-menu.mega-dropdown-menu').css('width', w);
  }
}