RDF-Ext : Tutorial
Step One : GitPod
I don't remember using it before, but I may well have done. First thing that happened when I followed the link (using GitHub credentials) it said I was upgraded to an organisation. Appears free 50 hours, then pay-as-you-go.
I got to an in-browser (I've running Brave on Ubuntu) VS Code.
At the terminal it appears to have run :
...
vite build --outDir=../../dist examples/browser
Dependencies installed ok, dist built ok. Somewhere I briefly saw the option to launch it in a local VS Code. Try that later...