This is the first complete JS "program" I've written; I've done debugging before, but I don't think I fully understand the JS way of things yet. I'm wondering if I've goofed in a really basic way?
On the web store : https://chrome.google.com/webstore/detail/morbid-motivation/kjpeibokdagajocicdijpeognkpccphj
On Github : https://github.com/jack-song/MorbidMotivation/blob/master/countdown.js
I'm definitely a beginner so any feedback (even non-JS) would be very greatly appreciated!