jQuery.easing[this.easing] for Magento2 Custom Theme

Question

I am making a custom theme and for no reason at all, I am now getting :

jQuery.easing[this.easing]

I wasnt previously getting this. Any Ideas?

Below is my requirejs config file:

var config = {
 map: {
 '*' : {
 owlcarousel : 'js/owl-carousel/owl.carousel',
 easing: 'jquery/jquery-ui',
 customscript : 'js/custom'
 }
 },
 paths:{
 'owlcarousel' : 'js/owl-carousel/owl.carousel',
 'easing': 'jquery/jquery-ui',
 'customscript' : 'js/custom'
 },
 shim: {
 'owlcarousel': {
 deps: ['jquery']
 },
 'easing': {
 deps: ['jquery']
 },
 'customscript': {
 deps: ['jquery']
 }
 }
};
 require([
 'jquery',
 'easing',
 'owlcarousel',
 'customscript',
 ], function ($) { 
 $(document).ready(function () {
 // -- Hero Carousel
 $("#owl-demo").owlCarousel({
 nav: true,
 items: 1,
 loop:true,
 autoplay:true,
 autoplayTimeout:3000,
 autoplaySpeed: 3000,
 autoplayHoverPause:true
 });
 // -- Sub Navigation
 openSubNav($);
 });
 });

The Problem occurs when I am calling the function openSubNav($); however it has previously worked. I added jquery ui to the map after a previous suggestion but still not working

Answer 1

I solved this. I am not sure why it worked before and not now, however the slideToggle function in my custom.js file I added

slideToggle('slow', 'linear' function(){} );

The linear was the addition that made it work.

Hope this is useful to someone