June 2018 Source
202020 is a Chrome extension I created to remind myself to look at something 20 feet away for 20 seconds every 20 minutes of staring at my screen, a strategy recommended by eye doctors to reduce eye strain. It uses the Chrome alarms API for timing.
It isn’t great, especially since the extension doesn’t turn off while you are away, causing notifications to build up. This can definitely be improved with some sort of idle detection, but I never got around to it.
Even if the extension isn’t very useful, I still learned a lot making it. I found it fascinating that web technologies like HTML/CSS/JS powered Chrome extensions, making it seem very accessible to me. This was one of the first “useful” things I tried to make, and I’m glad I did.