menu toggling & resizing screen precautions

menu.js

var nav = $('#nav'),
    menu = $('#nav .menu'),
    navButton = $('.nav-expand');
// mobile button dropdown
$('button.nav-expand').on('click', function(){
  menu.slideToggle(200);
  navButton.toggleClass('open');
});
var blocked = false,
    threshold = 705;
$(window).resize(function(){
  menuCheck($(window).outerWidth(true), blocked, threshold);
});
function menuCheck(w, b, t) {
  if (w>t && !b) {
    menu.show();
    blocked = !b;
    $('.nav-expand').removeClass('open');
  } else if (w<=t && b) {
    menu.hide();
    blocked = !b;
  }
}