Uncaught syntax error with .blur function [closed]

This is my javascript code to collapse the navigation toggle bar when the user clicks anywhere outside of the navigation list, the id and class selectors are correct, but the console shows "Uncaught SyntaxError: Unexpected end of input"

$(function () { // Same as document.addEventListener("DOMContentLoaded"...

  // Same as document.querySelector("#navbarToggle").addEventListener("blur",...
  $("#navbarToggle").blur(function (event) {
    var screenWidth = window.innerWidth;
    if (screenWidth < 768) {
      $("#collapsable-nav").collapse('hide');
    }
  });