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Show HN: Tzintl.js – International Date-Time Conversion

56 points by masswerk 5y ago

timemachine 5y ago
Thanks for sharing. Date math is my kryptonite.
jer0me 5y ago
Pronounced tinsel?
- masswerk 5y ago
  This is an interesting question. If it enjoys some success, I'll come up with a creative pronunciation… ;-) Tinsel is certainly nice!
  - KarlKemp 5y ago
    Just put a line in the README that it’s “pronounced with a hard G, like noon”, then wait to see what the MC at the first conference uses when they introduce you.
noodlesUK 5y ago
What’s the comparison with the well known JS/TS date time libraries such as date-fns or the older moment.js?
- masswerk 5y ago
  The focus is just on converting dates, there's no idea of formatting dates (other than a simple, localized ISO string, which may be useful to some for further parsing). It returns an object with numeric properties, letting you decide on what to do with it and what the actual format should be. Since it relies on the Intl implementation of the browser (which is supported by all modern browser, but only partly by later versions of MSIE), it's light-weight (ca 1.3 KB minified and gzipped) and should be up to date regarding day light saving time, etc., without any further maintenance required. (On the other hand, as you rely on a user's browser and the OS – as in the demo widget –, it is not recommended for mission critical tasks, like in banking. But this should be rather obvious to those designing such applications.)
davidcollantes 5y ago
Very well done, and useful! Thank you for building this, and releasing it for everyone to use.
Svetlitski 5y ago
It’ll be nice when TC39 finalizes Temporal [1] and it has been implemented in most major browsers, replacing Date and obviating libraries like this. [1] https://tc39.es/proposal-temporal/docs/index.html https://tc39.es/proposal-temporal/docs/index.html
- krono 5y ago
  https://caniuse.com/temporal https://caniuse.com/temporal Browser with the first green block wins a cookie, go!
- FrontAid 5y ago
  This issue currently blocks shipping Temporal support without a flag: https://github.com/tc39/proposal-temporal/issues/1450 https://github.com/tc39/proposal-temporal/issues/1450
masswerk 5y ago
Update: Version 1.1 now also supports time zone aliases (both TZIntl and TZProvider). – You should see some more time zones in the demo widget. (Aliases are now included in any test and there's also an option to include aliases in `TZProvider.enumerate(<boolean: all>)`, which still defaults to unique time zones like `Intl.supportedValuesOf("timeZone")`.)

56 points by masswerk 5y ago

timemachine 5y ago

Thanks for sharing. Date math is my kryptonite.

jer0me 5y ago

Pronounced tinsel?

masswerk 5y ago
This is an interesting question. If it enjoys some success, I'll come up with a creative pronunciation… ;-) Tinsel is certainly nice!
- KarlKemp 5y ago
  Just put a line in the README that it’s “pronounced with a hard G, like noon”, then wait to see what the MC at the first conference uses when they introduce you.

noodlesUK 5y ago

What’s the comparison with the well known JS/TS date time libraries such as date-fns or the older moment.js?

masswerk 5y ago
The focus is just on converting dates, there's no idea of formatting dates (other than a simple, localized ISO string, which may be useful to some for further parsing). It returns an object with numeric properties, letting you decide on what to do with it and what the actual format should be. Since it relies on the Intl implementation of the browser (which is supported by all modern browser, but only partly by later versions of MSIE), it's light-weight (ca 1.3 KB minified and gzipped) and should be up to date regarding day light saving time, etc., without any further maintenance required. (On the other hand, as you rely on a user's browser and the OS – as in the demo widget –, it is not recommended for mission critical tasks, like in banking. But this should be rather obvious to those designing such applications.)

davidcollantes 5y ago

Very well done, and useful! Thank you for building this, and releasing it for everyone to use.

Svetlitski 5y ago

It’ll be nice when TC39 finalizes Temporal [1] and it has been implemented in most major browsers, replacing Date and obviating libraries like this. [1] https://tc39.es/proposal-temporal/docs/index.html https://tc39.es/proposal-temporal/docs/index.html

krono 5y ago
https://caniuse.com/temporal https://caniuse.com/temporal Browser with the first green block wins a cookie, go!
FrontAid 5y ago
This issue currently blocks shipping Temporal support without a flag: https://github.com/tc39/proposal-temporal/issues/1450 https://github.com/tc39/proposal-temporal/issues/1450

masswerk 5y ago

Update: Version 1.1 now also supports time zone aliases (both TZIntl and TZProvider). – You should see some more time zones in the demo widget. (Aliases are now included in any test and there's also an option to include aliases in `TZProvider.enumerate(<boolean: all>)`, which still defaults to unique time zones like `Intl.supportedValuesOf("timeZone")`.)