relaunch Intl Locale Info feature in newly added functions

concepts

1. Intl Locale Info inspector

   Inspect getCalendars(), getHourCycles(), getNumberingSystems(), getWeekInfo() output for any locale — the relaunched function-style API.

2. Locale-aware calendar grid

   The motivation made visible: render an actual calendar using getWeekInfo() data. Pick a locale and the first column shifts, the weekend bands move (Fri–Sat in ar-SA, Thu–Fri in fa-IR), and ISO week numbers recompute from minimalDays.

3. Locale matrix (12 × 6 live grid)

   Twelve locales × six newly-added accessors (.calendars, .collations, .hourCycles, .numberingSystems, .timeZones, .textInfo). Each cell is a live API call running on your browser; click any cell to inspect the raw return value. Add your own locale tag to expand the matrix.

4. Week format playground

   Pick any locale (or type your own tag) and see getWeekInfo() rendered as a live calendar strip — first day highlighted in blue, weekend days shaded, minimalDays displayed. A cross-locale table compares eight locales side-by-side.

5. Text Direction via getTextInfo()

   Pick from 15 locales and see locale.getTextInfo() return { direction: 'rtl' } or 'ltr'. A sample text renders in the correct direction; a full comparison table lists all 15 locales and their directions.

6. World Clock via getTimeZones()

   A live clock grid using locale.getTimeZones() to obtain the canonical timezone for each locale. Clocks update every second via Intl.DateTimeFormat; add any BCP-47 locale tag to add a new clock card.

why it shipped

Intl Locale Info API is a new Stage ECMAScript TC39 proposal to enhance the Intl.Locale object by exposing Locale information, such as week data (first day in a week, weekend start day, weekend end day, minimun day in the first week), and text direction hour cycle used in the locale. https://github.com/tc39/proposal-intl-locale-info We launch Intl Locale

references

• ChromeStatus entry
• Spec