Vanilla JS method breaks if jQuery is included

I’m developing a website in Wordpress where I use just vanilla JavaScript and no other frameworks, so while using Velocity I use function Velocity(...). While testing I need to activate the Debug Bar which relies on jQuery, but when doing it, Velocity is looking for jQuery method instead giving the error ReferenceError: Can't find variable: Velocity. How can I resolve this issue? Sincerely, I don’t want to modify all the Velocity(...) functions with jQuery callback and then modify them again when testing is done. Hope there’s a solution for this.

[Rycochet]

Currently Velocity says “Oh, here’s jQuery, let’s connect to that instead” (same for Zepto) - so it can’t do both, you need to add a line (after loading Velocity) to copy it over -

window.Velocity = window.Velocity || (window.jQuery || window.Zepto || window).Velocity;

[MattyBalaam]

Alternatively you can try what I do and use an IIFE

(function(window, document, velocity, undefined){

// all your your code here

}) (window, document, window.jQuery ? window.jQuery.Velocity : window.Velocity);