Alfie Feedback

When I declare 'var a = b', it only logs 'a', which is fair. But then assigning 'a = b' logs both a and b. Perhaps counterintuitive.

My script doesn't complete within 30-60 seconds, while the same input and script runs in less than a second with node on the command line. This isn't too surprising, because I’m using Advent of Code to practice map, filter and reduce, and my day 2 solution isn't trying to be time or space efficient (although it’s not _that_ bad). It would be nice to get an error if it isn't going to complete in a reasonable amount of time.

I had an error but I didn't know, because it was in the "Console" tab, which is hidden by default. It'd be helpful if the tab header flashed or something when anything's written to it and it's not visible.

Repro: starts from https://alfie.prodo.ai edit some code click "new" notice how nothing changed (my edits are still there)

For me (Ubuntu 18.10) on currrent Firefox and Chromium performance is really bad - e.g. for https://alfie.prodo.ai/unlawful-candy-cane

It’s only cosmetic, but it would be nice if the editor font list had 'Fira Code' at the start of the CSS font-family list, so it uses that I have it installed.

Using data.split \n fails but data.split( \n ); works. It's not major, but split by is my goto default for splitting strings. (I can't figure out how to disable the code formatting, it's data.split backtick \n backtick )

There's only one setting ("Change editor line heights") with an unclear name and basically no reason to turn it off. How about just getting rid of it?

Visiting Alfie on mobile is confusing and broken. Even if the editor and traces do not work, I should be provided with information on what Alfie is and how I could use it on desktop.

I can't tell whether I've saved or not. Perhaps the "Save" button could be disabled and changed to say "Saved" when there's no changes to the code or input.