Method getWeekInfo

packages/intl-locale/index.ts:767–793

* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getWeekInfo * https://tc39.es/proposal-intl-locale-info/#sec-Intl.Locale.prototype.getWeekInfo

()

   * https://tc39.es/proposal-intl-locale-info/#sec-Intl.Locale.prototype.getWeekInfo
   */
  public getWeekInfo(): {
    firstDay: string
    weekend: {start: string; end: string}
    minimalDays: number
  } {
    const info = Object.create(Object.prototype)
    const internalSlots = getInternalSlots(this)
    if (!HasOwnProperty(internalSlots, 'initializedLocale')) {
      throw new TypeError('Error uninitialized locale')
    }

    const wi = weekInfoOfLocale(this)
    const we = wi.weekend

    createDataProperty(info, 'firstDay', wi.firstDay)

    createDataProperty(info, 'weekend', we)

    createDataProperty(info, 'minimalDays', wi.minimalDays)

    const fw = internalSlots.firstDayOfWeek
    if (fw !== undefined) {
      info.firstDay = fw
    }

    return info
  }

  static relevantExtensionKeys: readonly [
    'ca',