Javascript Error: Can't find variable: require

[boustrephon]

I have just downloaded this extension using GitHub desktop and have installed it on my MacBook running Mojave 10.14.6 in a Python 3.7 Anaconda environment (using pip). I started up Jupyter Lab and ran the magic (no problem). However, when I tried to render something as in your example, I got an error - Javascript Error: Can't find variable: require. I have done a quick search online and found something that said:

pure javascript (in browser) does not support "require" - the easiest way it is include "firebase" module like other js scripts: <script src="yoursite.com/node_modules/firebase/firebase.js" />
https://stackoverflow.com/questions/40087467/referenceerror-cant-find-variable-require

Any idea what I should do?

UPDATE: Error seems associated with opening it in Jupyter Lab. There is no error in classic Jupyter (but no image yet... working on that).