I scored 10/28 on https://jsdate.wtf/ and all I got was this lousy text to share on social media.
this post was submitted on 11 Jul 2025
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Programming
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12/28
Surprised that I got this score when I only know python
This is just a good reminder of human nature to make bad choices (using JS) and stick with them forever.
Ha this is even worse than I could have imagined!
7/28. Of course no one would ever do most of those things, they are interesting to think about but with little practical use.
I don't like calling myself a JS/TS dev but my biggest project that I currently work on is written in it, so I had to try it.
16/28. I mean it's incredible how I can throw a diabolical amount of variations of formatting at it and somehow get valid dates.
Can we start a new web with a better language/platform already?
There's wasm if you need to target browsers.
Google tried to do that with Dart, and failed. In fairness Dart 1 was much worse than Dart 2... So maybe that was a good thing because there's no way they'd have been able to improve Dart as much as they have if it was part of the web.
For dates there finally is something better anyway: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal
Why? Why not improve JS (e.g. with Temporal), especially given how excellent Typescript is?
JS is a lost cause.
How? It's easy not to run into the common issues by using TS. What's so bad about it that we should throw away the existing ecosystem?
Please give arguments instead of platitudes.
9/28. WTF'ing through 90% of the questions.
Nobody understands JavaScript. It's the quantum mechanics of the software world.
If you're not very familiar with JS, watch the Wat talk before taking the quiz to know what to expect from this wonderful language.
And then promptly get yourself familiar with how the language actually works. https://github.com/getify/You-Dont-Know-JS
People who complain about JS often assume it has features of other languages and fail to realize it has its own architecture and winding history.
I scored 17/28 on https://jsdate.wtf/ and all I got was this lousy text to share on social media.
Idk anything about Date but got pretty far with intuition of JS whackiness
I scored 13/28 on https://jsdate.wtf/ and all I got was this lousy text to share on social media.
Oof. I’ve been a JS dev since 1998.
Thank god Temporal is finally in Stage 3, and already rolled out in Firefox. I can't wait to be done with JS's Date forever.
I got 10/28, but I was crying after the 7th question
I got a 4/28 and got told I would have scored higher if I guessed at random. Ouch. (I am not a dev)
I mean, for what it's worth, I'm a seasoned dev and just did a run where I tried to answer everything as it makes sense to me (which is "throws an error" or "invalid date" for all of them) and I also got a score of 4/28.
...and two of those points were given to me, because the quiz interpreted my answer differently than I meant it.
In other words, this quiz exists to highlight that JavaScript's Date functions make no sense.
The quirks in this quiz aren’t even universal, and vary based on which browser you’re using. See the table at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/parse#non-standard_date_strings
Also I got 13/28 😑
I did not do well:
"I scored 9/28 on https://jsdate.wtf/ and all I got was this lousy text to share on social media."
Ive been a dev for a long time. Im glad im not doing javascript all that much anymore.
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.
I scored 8/28 on https://jsdate.wtf/ and all I got was this lousy text to share on social media.
don't tap for spoilers
The sequence of questions about new Date("0"), new Date("1"), and new Date("2") got me good.
Same. I think I got one on accident too.
That was so funny, I had to pause taking the quiz I was laughing so hard at question 9. The snark in the explanations is fantastic.
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!
Floating point rounding issues are basic comp science issues. Hopefully nobody thinks that those are JavaScript quirks.
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.