JavaScript Temporal is coming | MDN Blog
developer.mozilla.org
A new way to handle dates and times is being added to JavaScript. Let's take a look at Temporal, what problems it solves, the current state, and what you'll find in the new documentation about it on MDN.
  • Deebster@programming.dev
    18·
    7 days ago

    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.

    • SaintWacko@slrpnk.netEnglish
      6·
      7 days ago

      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?

        • ZectiviEnglish
          6·
          7 days ago

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

        • SaintWacko@slrpnk.netEnglish
          3·
          6 days 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

    • rg_@jlai.lu
      3·
      6 days 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@programming.devEnglish
    3·
    6 days 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.