Ever have one of those mornings?
Consider this a cautionary tale
I was knocking together what should have been a very quick loader for a kiosk (do we still call them that?)
I grabbed a starter file I had sitting around that had the following script tags
<script src='https://cdnjs.cloudflare.com/ajax/libs/zepto/1.2.0/zepto.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenMax.min.js'></script>
Instead of
<script src='https://cdnjs.cloudflare.com/ajax/libs/zepto/1.0rc1/zepto.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/gsap/1.20.3/TweenMax.min.js'></script>
Now because I'm showing you both - the obvious error is... um...obvious, but it wasn't obvious to me and everything was fine and dandy - then the client showed up (with coffee and doughnuts) and the js errors started (screenshot of the console attached for your reference and bemusement) .
I placated the client while I tried to figure out what the issue was - took me 5 minutes to create a working pen of just the part that was tossing the errors - but another 2 hours to realize why, luckily my studio cat entertained the client to the point of them losing track of time me, allowing me to fix everything to their satisfaction.
really the only change needed was the script tag, for whatever reason it was chocking on lines 7-10 (the rotation function)
I realize no one else will likely have this issue, ever - but I wanted to document it anyhow, this is the kind of micro-minutia that gets me - it's almost never the actual work.