Maybe this is just an unsupported use case but I think it's because the browser window isn't wide enough so the text on the left gets cut off. I have my browser window filling up half of the screen.
EDIT: works now!
Firefox 49.0.2
Makes it very hard to read.
Awesome stuff though, excited to see where it goes.
I opened the quickstart in Chrome and went all the way through without a hitch until the very end - the last code block doesn't appear to do anything. Clicking submit doesn't update the visible output, nor does it clear the form as the code shows it should.
I'm thoroughly liking the environment other than the hiccups though. I'm not familiar with datalog, but have dabbled a bit in prolog and always liked the way unification felt.
EDIT: Also: base.js:7035 Blocked a frame with origin "https://www.youtube.com" from accessing a frame with origin "http://programming.witheve.com". The frame requesting access has a protocol of "https", the frame being accessed has a protocol of "http". Protocols must match.
EDIT2: Why does opening the chrome console fix the text cut off issue.... this is so weird.
Fix confirmed!