Great quiz. It teaches you the rules while training you to expect the unexpected, even in the rare cases that the rules are applied consistently.
I got exactly half the questions right.
this post was submitted on 11 Jul 2025
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Programming
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I am a frontend dev. JavaScript (well, TypeScript) is my bread and butter. Even knowing its quirks I never would have thought how inconsistent Date actually is. I encourage everyone to try this quiz.
This is what JavaScript haters should bring forth, not 0.1 + 0.2 !== 0.3!
There is a reason almost everyone use some Date lib, like Luxon and not the built in. And well, having a horrible built in lib that they can't change due to legacy code breaking is nothing really new or unique to JS.
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