jQuery - toggle navigation function

Question

function toggleNavigation(toggleElement) {
    var menu = document.getElementById("user-nav");
    var isExpanded = menu.getAttribute("aria-expanded") === "true";
    menu.setAttribute("aria-expanded", !isExpanded);
    toggleElement.setAttribute("aria-expanded", !isExpanded);
  }

  $(".header .icon-menu").on("click", function(e) {
    e.stopPropagation();
    toggleNavigation(this);
  });

  $(".header .icon-menu").on("keyup", function(e) {
    if (e.keyCode === 13) { // Enter key
      e.stopPropagation();
      toggleNavigation(this);
    }
});