JavaScript

2124 readers

1 users here now

founded 2 years ago

MODERATORS

erlingur

Ategon

nick

JavaScript Temporal is coming (developer.mozilla.org)

submitted 1 week ago by [email protected] to c/javascript

7 comments fedilink hide all child comments

top 7 comments

sorted by: hot top controversial new old

[–] Deebster 18 points 1 week ago (2 children)

I'll be very happy to not have to use Date any more. Pop quiz, what's in whatnum?

const vday = new Date('14 February 2025');
const whatnum = vday.getDay() - vday.getMonth();

Err, it's 5... Ha, amazing; that's not even the gotcha I meant to demonstrate. getDay returns the day of the week, the day of the month is returned from getDate.

Take two:

const vday = new Date('14 February 2025');
const whatnum = vday.getDate() - vday.getMonth();

So this is 14 - 2 = 12, right? Nope! The day (from getDate) is 1-based whereas month is 0-based, so 14 - 1 = 13.

[–] [email protected] 6 points 1 week ago (1 children)

Man, I can't remember the last time I used Date. I either use moment or... the other big one. I think it's just a three letter name?

[–] Deebster 2 points 1 week ago (2 children)

date-fns? It's third in my search results but doesn't ring any bells to me.

[–] [email protected] 6 points 1 week ago

Day.js possibly. It’s a near drop-in for moment since moment is deprecated.

[–] [email protected] 3 points 1 week ago

Yeah, that one! It's a pretty nice library. The difference between it and moment is that date-fns operates on standard Date objects, rather than having its own type

[–] [email protected] 4 points 1 week ago

I'm quite lucky because I only had to solve an issue with JavaScript dates once, but what a nightmare it was… I had to understand how timezones worked, that was not fun!

[–] dracs 3 points 1 week ago

Thank god. I've been regularly checking the Github page waiting for it to finally land in browsers. Can hopefully start using the pollyfill for it soon.