I finally decided to attempt making a custom component library in Retool, and wow, I am impressed how easy it was. I am happy to share the sources in hopes it sheds some light for others, just how painless it is.
As an experiment, I created
It is a very thin wrapper around
retool-ccl works flawlessly and the dev mode is fantastic.
Great job Retool!
Replying to myself as a note of what I have found out.
I thought that maybe the new Custom Components rendered as "native" components, instead of iframes like the old version.
I guess if I really thought about it, we are mounting a whole "react app" in the component, even though it is one component.
My idea to use the KaTeX component in a list component now seems silly.
I don't want a dozen or more iframes showing just a singular KaTeX output? That is not a good solution 
Thanks for sharing, @khill-fbmc! I'm a big fan of the new custom component libraries, as well. 
The components do still render within an iframe, though, which might limit their use case a bit. Let me know if you have any questions as you play around with it!
Relevant:
I don't know how actively github issues are monitored, but I opened one. (It's a small issue)
