Format dates acccording to the current locale about svelte-i18n HOT 5 CLOSED

I'm going to presume this isn't the cause of your issue, but just in case: I believe svelte-i18n, at some level, wraps the Intl API. The Intl API only has access to whatever locales are available in your runtime (server-side: Node.js, client-side: whatever the browser ships with). This bit me recently working with ga-IE localisation in Ireland: Firefox and Edge ship with better localised distros here and svelte-i18n was localising the dates for me, but whenever I opened the app in Chrome the dates were displayed in English as Chrome had no support for the ga-IE locale. In the end the only solution that reliably worked in userland was to use moment.js for date formatting (manually importing ga-IE locale) and svelte-i18n for the rest of the string translation. It works good though, and the way svelte-i18n v3 has broken up the _, number and date functions so they can be tree-shaken reduces extra weight involved with adding an additional library.

Hope I haven't got any of the above wrong @kaisermann

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@rodoch Got pretty much everything right! Thanks for the great explanation 😁 It's not hard to create a derived store from $locale to format dates with another lib:

const myDateFormatter = derived([locale], (locale) => (date) => dateLib(date, locale))

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We actually have realized that dates are formatted according to the initial locale (taken e.g. from path), but when you change locale with $locale = 'jp', it updates all localized texts, but date formats remain according to the previous/initial one. This seems to be a bug

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@cbxp @angryziber There was a bug regarding the memoization of date/time/number formatters which prevented them from being updated when the $locale changed, see #47. Can you guys try again in v2.3.1?

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That's a super tip, very clean, thanks. This is a great library, I wouldn't be using Svelte without it. Hoping to do a write up on it somewhere soon!

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