diff --git a/client/src/components/Admin/plugins/VersionLine.tsx b/client/src/components/Admin/plugins/VersionLine.tsx
index 154bf9b9e..069d1c06d 100644
--- a/client/src/components/Admin/plugins/VersionLine.tsx
+++ b/client/src/components/Admin/plugins/VersionLine.tsx
@@ -1,16 +1,25 @@
-import { ShieldCheck } from 'lucide-react'
-import { useFormatDate } from '../../../hooks/useDateFormat'
-import { fs } from '../../shared/DialogShell'
-import type { VersionInfo } from './pluginModel'
+import { ShieldCheck } from 'lucide-react';
+import { useFormatDate } from '../../../hooks/useDateFormat';
+import { fs } from '../../shared/DialogShell';
+import type { VersionInfo } from './pluginModel';
/** A version number with its date and, when the author signed it, a quiet tick. */
export default function VersionLine({ v }: { v: VersionInfo }) {
- const { formatDate } = useFormatDate()
+ const { formatDate } = useFormatDate();
return (
- v{v.version}
- {v.publishedAt && {formatDate(new Date(v.publishedAt))}}
+
+ v{v.version}
+
+ {v.publishedAt && (
+
+ {formatDate(new Date(v.publishedAt))}
+
+ )}
{v.signed && }
- )
+ );
}
diff --git a/client/src/components/Admin/useBackupAdmin.ts b/client/src/components/Admin/useBackupAdmin.ts
index 1c43726c2..d126bbaee 100644
--- a/client/src/components/Admin/useBackupAdmin.ts
+++ b/client/src/components/Admin/useBackupAdmin.ts
@@ -1,8 +1,8 @@
import { type ChangeEvent, useEffect, useEffectEvent, useRef, useState } from 'react';
import { backupApi } from '../../api/client';
-import { useTranslation } from '../../i18n';
import { useFormatDate } from '../../hooks/useDateFormat';
+import { useTranslation } from '../../i18n';
import { useSettingsStore } from '../../store/settingsStore';
import { getApiErrorMessage } from '../../types';
import { useToast } from '../shared/Toast';
diff --git a/client/src/components/Budget/costsModel.ts b/client/src/components/Budget/costsModel.ts
index 5b605cc18..cf0126b96 100644
--- a/client/src/components/Budget/costsModel.ts
+++ b/client/src/components/Budget/costsModel.ts
@@ -1,9 +1,9 @@
import type { BudgetParticipantFinal, BudgetUnconverted, CostCategory } from '@trek/shared';
+import { readDateFormat } from '../../hooks/useDateFormat';
import { convertBooked, convertedLine, inDisplayCurrency, tripAmountOf } from '../../hooks/useExchangeRates';
import type { BudgetItem } from '../../types';
-import { readDateFormat } from '../../hooks/useDateFormat';
-import { currencyDecimals } from '../../utils/formatters';
import { formatDisplayDate } from '../../utils/dateFormat';
+import { currencyDecimals } from '../../utils/formatters';
import { currenciesWith, SYMBOLS } from './BudgetPanel.constants';
import { paidByUser, readUserNote, settlementDate, splitEqualShares } from './CostsPanel.helpers';
import { catMeta, COST_CATEGORY_LIST } from './costsCategories';
@@ -380,12 +380,17 @@ export function buildCostsCsv(items: BudgetItem[], opts: CsvBuildOptions): { fil
const fmtDate = (iso: string) => {
if (!iso) return '';
try {
- return formatDisplayDate(new Date(iso + 'T00:00:00Z'), opts.locale, {
- day: '2-digit',
- month: '2-digit',
- year: 'numeric',
- timeZone: 'UTC',
- }, readDateFormat());
+ return formatDisplayDate(
+ new Date(iso + 'T00:00:00Z'),
+ opts.locale,
+ {
+ day: '2-digit',
+ month: '2-digit',
+ year: 'numeric',
+ timeZone: 'UTC',
+ },
+ readDateFormat()
+ );
} catch {
return iso;
}
diff --git a/client/src/components/Roadtrip/ChargingInfo.tsx b/client/src/components/Roadtrip/ChargingInfo.tsx
index 51f39b75f..b354215ea 100644
--- a/client/src/components/Roadtrip/ChargingInfo.tsx
+++ b/client/src/components/Roadtrip/ChargingInfo.tsx
@@ -1,8 +1,8 @@
import { cheapestEnergy, type ChargingEnergyPrice, type ChargingInfo as Info } from '@trek/shared';
import { ChevronDown, Coins, PlugZap } from 'lucide-react';
import { useEffect, useState } from 'react';
-import { useTranslation } from '../../i18n/TranslationContext';
import { useFormatDate } from '../../hooks/useDateFormat';
+import { useTranslation } from '../../i18n/TranslationContext';
import { chargingRepo } from '../../repo/chargingRepo';
import { useTripStore } from '../../store/tripStore';
import { isEffectivelyOffline } from '../../sync/networkMode';
diff --git a/client/src/components/Settings/useAccountSettings.ts b/client/src/components/Settings/useAccountSettings.ts
index 49fdf7292..c31d0de65 100644
--- a/client/src/components/Settings/useAccountSettings.ts
+++ b/client/src/components/Settings/useAccountSettings.ts
@@ -2,11 +2,11 @@ import { escapeHtml } from '@trek/shared';
import React, { useEffect, useRef, useState } from 'react';
import { useNavigate, useSearchParams } from 'react-router';
import { adminApi, authApi } from '../../api/client';
-import { useTranslation } from '../../i18n';
import { useDateFormat } from '../../hooks/useDateFormat';
-import { formatDisplayDateTime } from '../../utils/dateFormat';
+import { useTranslation } from '../../i18n';
import { useAuthStore } from '../../store/authStore';
import { getApiErrorMessage, type UserWithOidc } from '../../types';
+import { formatDisplayDateTime } from '../../utils/dateFormat';
import { passwordErrorKey } from '../../utils/passwordError';
import { useToast } from '../shared/Toast';
diff --git a/client/src/components/Settings/usePasskeys.ts b/client/src/components/Settings/usePasskeys.ts
index b2f0a3472..4dc2a2ba9 100644
--- a/client/src/components/Settings/usePasskeys.ts
+++ b/client/src/components/Settings/usePasskeys.ts
@@ -1,11 +1,11 @@
import { startRegistration } from '@simplewebauthn/browser';
import { useEffect, useState } from 'react';
import { authApi, type PasskeyCredential } from '../../api/client';
+import { readDateFormat } from '../../hooks/useDateFormat';
import { useTranslation } from '../../i18n';
import { getApiErrorMessage } from '../../types';
-import { useToast } from '../shared/Toast';
-import { readDateFormat } from '../../hooks/useDateFormat';
import { formatDisplayDate } from '../../utils/dateFormat';
+import { useToast } from '../shared/Toast';
/** Parse a SQLite UTC timestamp ("YYYY-MM-DD HH:MM:SS") into a local date string. */
export function fmtDate(ts: string | null): string | null {
diff --git a/client/src/components/Settings/usePluginActivity.ts b/client/src/components/Settings/usePluginActivity.ts
index 56aa1774f..19af5122e 100644
--- a/client/src/components/Settings/usePluginActivity.ts
+++ b/client/src/components/Settings/usePluginActivity.ts
@@ -1,7 +1,7 @@
import { useEffect, useState } from 'react';
import { pluginsApi } from '../../api/client';
-import { useTranslation } from '../../i18n';
import { useDateFormat } from '../../hooks/useDateFormat';
+import { useTranslation } from '../../i18n';
import { formatDisplayDateTime } from '../../utils/dateFormat';
export interface ActivityRow {
diff --git a/client/src/components/Tours/wanderer/WandererBrowserRail.tsx b/client/src/components/Tours/wanderer/WandererBrowserRail.tsx
index bb662dee6..a8e842355 100644
--- a/client/src/components/Tours/wanderer/WandererBrowserRail.tsx
+++ b/client/src/components/Tours/wanderer/WandererBrowserRail.tsx
@@ -18,8 +18,8 @@ import {
} from 'lucide-react';
import type { ReactNode } from 'react';
import { Link } from 'react-router';
-import { useTranslation } from '../../../i18n';
import { useDateFormat } from '../../../hooks/useDateFormat';
+import { useTranslation } from '../../../i18n';
import { useSettingsStore } from '../../../store/settingsStore';
import { formatDisplayDate } from '../../../utils/dateFormat';
import { formatDistance, formatElevation } from '../../../utils/units';
diff --git a/client/src/hooks/useDateFormat.ts b/client/src/hooks/useDateFormat.ts
index a1c126a8d..625d092fc 100644
--- a/client/src/hooks/useDateFormat.ts
+++ b/client/src/hooks/useDateFormat.ts
@@ -1,17 +1,17 @@
-import { DEFAULT_DATE_FORMAT, type DateFormat } from '@trek/shared'
-import { useCallback } from 'react'
-import { useTranslation } from '../i18n'
-import { useSettingsStore } from '../store/settingsStore'
-import { formatDisplayDate, formatDisplayDateTime } from '../utils/dateFormat'
+import { DEFAULT_DATE_FORMAT, type DateFormat } from '@trek/shared';
+import { useCallback } from 'react';
+import { useTranslation } from '../i18n';
+import { useSettingsStore } from '../store/settingsStore';
+import { formatDisplayDate, formatDisplayDateTime } from '../utils/dateFormat';
/** The current user's date format (#2971); 'auto' follows the interface language. */
export function useDateFormat(): DateFormat {
- return useSettingsStore((s) => s.settings.date_format) ?? DEFAULT_DATE_FORMAT
+ return useSettingsStore((s) => s.settings.date_format) ?? DEFAULT_DATE_FORMAT;
}
/** The same value outside React (stores, exports, plain helpers), read when called. */
export function readDateFormat(): DateFormat {
- return useSettingsStore.getState().settings.date_format ?? DEFAULT_DATE_FORMAT
+ return useSettingsStore.getState().settings.date_format ?? DEFAULT_DATE_FORMAT;
}
/**
@@ -19,15 +19,15 @@ export function readDateFormat(): DateFormat {
* the user's date format, for components that write dates.
*/
export function useFormatDate() {
- const { locale } = useTranslation()
- const format = useDateFormat()
+ const { locale } = useTranslation();
+ const format = useDateFormat();
const date = useCallback(
(value: Date, opts?: Intl.DateTimeFormatOptions) => formatDisplayDate(value, locale, opts, format),
[locale, format]
- )
+ );
const dateTime = useCallback(
(value: Date, opts?: Intl.DateTimeFormatOptions) => formatDisplayDateTime(value, locale, opts, format),
[locale, format]
- )
- return { formatDate: date, formatDateTime: dateTime, locale, dateFormat: format }
+ );
+ return { formatDate: date, formatDateTime: dateTime, locale, dateFormat: format };
}
diff --git a/client/src/mobile/screens/admin/MPluginVersionDate.tsx b/client/src/mobile/screens/admin/MPluginVersionDate.tsx
index 0cfb846c5..a924ed942 100644
--- a/client/src/mobile/screens/admin/MPluginVersionDate.tsx
+++ b/client/src/mobile/screens/admin/MPluginVersionDate.tsx
@@ -1,8 +1,8 @@
-import { useFormatDate } from '../../../hooks/useDateFormat'
+import { useFormatDate } from '../../../hooks/useDateFormat';
/** The day a plugin version was published, in the user's date format (#2971). */
export default function MPluginVersionDate({ at, className }: { at?: string | null; className?: string }) {
- const { formatDate } = useFormatDate()
- if (!at) return null
- return {formatDate(new Date(at))}
+ const { formatDate } = useFormatDate();
+ if (!at) return null;
+ return {formatDate(new Date(at))};
}
diff --git a/client/src/utils/dateFormat.test.ts b/client/src/utils/dateFormat.test.ts
index 9a7b82e1a..881debc1a 100644
--- a/client/src/utils/dateFormat.test.ts
+++ b/client/src/utils/dateFormat.test.ts
@@ -1,5 +1,5 @@
// FE-UTIL-DATEFMT-001 to FE-UTIL-DATEFMT-020
-import { describe, it, expect } from 'vitest'
+import { describe, expect, it } from 'vitest';
import {
dateFieldOrder,
dateFormatOptions,
@@ -8,12 +8,12 @@ import {
formatDisplayDate,
formatDisplayDateTime,
isNumericDate,
-} from './dateFormat'
+} from './dateFormat';
// 31 December 2026, 15:04 UTC: no day of it reads as a month, so every layout is unambiguous.
-const NYE = new Date(Date.UTC(2026, 11, 31, 15, 4))
-const UTC = { timeZone: 'UTC' } as const
-const NUMERIC: Intl.DateTimeFormatOptions = { day: '2-digit', month: '2-digit', year: 'numeric', timeZone: 'UTC' }
+const NYE = new Date(Date.UTC(2026, 11, 31, 15, 4));
+const UTC = { timeZone: 'UTC' } as const;
+const NUMERIC: Intl.DateTimeFormatOptions = { day: '2-digit', month: '2-digit', year: 'numeric', timeZone: 'UTC' };
describe('dateFormat (#2971)', () => {
describe('formatDisplayDate', () => {
@@ -24,47 +24,54 @@ describe('dateFormat (#2971)', () => {
['de-DE', NUMERIC],
['ko-KR', { day: 'numeric', month: 'short', year: 'numeric', timeZone: 'UTC' }],
['en-GB', { day: '2-digit', month: '2-digit', year: '2-digit', timeZone: 'UTC' }],
- ]
+ ];
for (const [locale, opts] of cases) {
- const expected = NYE.toLocaleDateString(locale, opts)
- expect(formatDisplayDate(NYE, locale, opts, 'auto')).toBe(expected)
- expect(formatDisplayDate(NYE, locale, opts, 'DD-MM-YY')).toBe(expected)
- expect(formatDisplayDate(NYE, locale, opts, null)).toBe(expected)
- expect(formatDisplayDate(NYE, locale, opts)).toBe(expected)
+ const expected = NYE.toLocaleDateString(locale, opts);
+ expect(formatDisplayDate(NYE, locale, opts, 'auto')).toBe(expected);
+ expect(formatDisplayDate(NYE, locale, opts, 'DD-MM-YY')).toBe(expected);
+ expect(formatDisplayDate(NYE, locale, opts, null)).toBe(expected);
+ expect(formatDisplayDate(NYE, locale, opts)).toBe(expected);
}
- })
+ });
it('FE-UTIL-DATEFMT-002: each format writes 31 December 2026 in its own layout', () => {
- expect(formatDisplayDate(NYE, 'en-US', UTC, 'YYYY-MM-DD')).toBe('2026-12-31')
- expect(formatDisplayDate(NYE, 'en-US', UTC, 'YYYY/MM/DD')).toBe('2026/12/31')
- expect(formatDisplayDate(NYE, 'en-US', UTC, 'DD.MM.YYYY')).toBe('31.12.2026')
- expect(formatDisplayDate(NYE, 'en-US', UTC, 'DD/MM/YYYY')).toBe('31/12/2026')
- expect(formatDisplayDate(NYE, 'de-DE', UTC, 'MM/DD/YYYY')).toBe('12/31/2026')
- })
+ expect(formatDisplayDate(NYE, 'en-US', UTC, 'YYYY-MM-DD')).toBe('2026-12-31');
+ expect(formatDisplayDate(NYE, 'en-US', UTC, 'YYYY/MM/DD')).toBe('2026/12/31');
+ expect(formatDisplayDate(NYE, 'en-US', UTC, 'DD.MM.YYYY')).toBe('31.12.2026');
+ expect(formatDisplayDate(NYE, 'en-US', UTC, 'DD/MM/YYYY')).toBe('31/12/2026');
+ expect(formatDisplayDate(NYE, 'de-DE', UTC, 'MM/DD/YYYY')).toBe('12/31/2026');
+ });
it('FE-UTIL-DATEFMT-003: the language does not change a chosen format', () => {
for (const locale of ['en-US', 'de-DE', 'ko-KR', 'ar', 'fr-FR']) {
- expect(formatDisplayDate(NYE, locale, NUMERIC, 'YYYY-MM-DD')).toBe('2026-12-31')
+ expect(formatDisplayDate(NYE, locale, NUMERIC, 'YYYY-MM-DD')).toBe('2026-12-31');
}
- })
+ });
it('FE-UTIL-DATEFMT-004: single-digit days and months are padded', () => {
- const march = new Date(Date.UTC(2026, 2, 5))
- expect(formatDisplayDate(march, 'en-US', { day: 'numeric', month: 'numeric', year: 'numeric', timeZone: 'UTC' }, 'DD.MM.YYYY')).toBe('05.03.2026')
- })
+ const march = new Date(Date.UTC(2026, 2, 5));
+ expect(
+ formatDisplayDate(
+ march,
+ 'en-US',
+ { day: 'numeric', month: 'numeric', year: 'numeric', timeZone: 'UTC' },
+ 'DD.MM.YYYY'
+ )
+ ).toBe('05.03.2026');
+ });
it('FE-UTIL-DATEFMT-005: year 2-digit keeps two digits of the year', () => {
- const opts: Intl.DateTimeFormatOptions = { day: '2-digit', month: '2-digit', year: '2-digit', timeZone: 'UTC' }
- expect(formatDisplayDate(NYE, 'en-US', opts, 'DD.MM.YYYY')).toBe('31.12.26')
- expect(formatDisplayDate(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe('26-12-31')
- })
+ const opts: Intl.DateTimeFormatOptions = { day: '2-digit', month: '2-digit', year: '2-digit', timeZone: 'UTC' };
+ expect(formatDisplayDate(NYE, 'en-US', opts, 'DD.MM.YYYY')).toBe('31.12.26');
+ expect(formatDisplayDate(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe('26-12-31');
+ });
it('FE-UTIL-DATEFMT-006: day and month without a year write only those two, in layout order', () => {
- const opts: Intl.DateTimeFormatOptions = { day: 'numeric', month: 'numeric', timeZone: 'UTC' }
- expect(formatDisplayDate(NYE, 'en-US', opts, 'DD.MM.YYYY')).toBe('31.12')
- expect(formatDisplayDate(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe('12-31')
- expect(formatDisplayDate(NYE, 'en-US', opts, 'MM/DD/YYYY')).toBe('12/31')
- })
+ const opts: Intl.DateTimeFormatOptions = { day: 'numeric', month: 'numeric', timeZone: 'UTC' };
+ expect(formatDisplayDate(NYE, 'en-US', opts, 'DD.MM.YYYY')).toBe('31.12');
+ expect(formatDisplayDate(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe('12-31');
+ expect(formatDisplayDate(NYE, 'en-US', opts, 'MM/DD/YYYY')).toBe('12/31');
+ });
it('FE-UTIL-DATEFMT-007: a month name or a long dateStyle is left to Intl', () => {
const named: Intl.DateTimeFormatOptions[] = [
@@ -72,112 +79,135 @@ describe('dateFormat (#2971)', () => {
{ day: 'numeric', month: 'short', year: 'numeric', timeZone: 'UTC' },
{ month: 'long', year: 'numeric', timeZone: 'UTC' },
{ dateStyle: 'medium', timeZone: 'UTC' },
- ]
+ ];
for (const opts of named) {
- expect(formatDisplayDate(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(NYE.toLocaleDateString('de-DE', opts))
+ expect(formatDisplayDate(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(NYE.toLocaleDateString('de-DE', opts));
}
- })
+ });
it('FE-UTIL-DATEFMT-021: a weekday beside a numeric date keeps the language, the date takes the format', () => {
- const opts: Intl.DateTimeFormatOptions = { weekday: 'short', day: '2-digit', month: '2-digit', year: 'numeric', timeZone: 'UTC' }
- expect(formatDisplayDate(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(`${NYE.toLocaleDateString('de-DE', { weekday: 'short', timeZone: 'UTC' })}, 2026-12-31`)
- expect(formatDisplayDate(NYE, 'de-DE', opts, 'auto')).toBe(NYE.toLocaleDateString('de-DE', opts))
- })
+ const opts: Intl.DateTimeFormatOptions = {
+ weekday: 'short',
+ day: '2-digit',
+ month: '2-digit',
+ year: 'numeric',
+ timeZone: 'UTC',
+ };
+ expect(formatDisplayDate(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(
+ `${NYE.toLocaleDateString('de-DE', { weekday: 'short', timeZone: 'UTC' })}, 2026-12-31`
+ );
+ expect(formatDisplayDate(NYE, 'de-DE', opts, 'auto')).toBe(NYE.toLocaleDateString('de-DE', opts));
+ });
it('FE-UTIL-DATEFMT-008: dateStyle short counts as numeric', () => {
- expect(formatDisplayDate(NYE, 'en-US', { dateStyle: 'short', timeZone: 'UTC' }, 'DD/MM/YYYY')).toBe('31/12/2026')
- })
+ expect(formatDisplayDate(NYE, 'en-US', { dateStyle: 'short', timeZone: 'UTC' }, 'DD/MM/YYYY')).toBe('31/12/2026');
+ });
it('FE-UTIL-DATEFMT-009: an invalid date falls back to toLocaleDateString', () => {
- const invalid = new Date('nope')
- expect(formatDisplayDate(invalid, 'en-US', NUMERIC, 'YYYY-MM-DD')).toBe(invalid.toLocaleDateString('en-US', NUMERIC))
- })
- })
+ const invalid = new Date('nope');
+ expect(formatDisplayDate(invalid, 'en-US', NUMERIC, 'YYYY-MM-DD')).toBe(
+ invalid.toLocaleDateString('en-US', NUMERIC)
+ );
+ });
+ });
describe('formatDisplayDateTime', () => {
it('FE-UTIL-DATEFMT-010: auto, an unknown value or none is exactly toLocaleString', () => {
- const opts: Intl.DateTimeFormatOptions = { ...NUMERIC, hour: '2-digit', minute: '2-digit' }
+ const opts: Intl.DateTimeFormatOptions = { ...NUMERIC, hour: '2-digit', minute: '2-digit' };
for (const locale of ['en-US', 'de-DE']) {
- expect(formatDisplayDateTime(NYE, locale, opts, 'auto')).toBe(NYE.toLocaleString(locale, opts))
- expect(formatDisplayDateTime(NYE, locale, opts, 'nope')).toBe(NYE.toLocaleString(locale, opts))
- expect(formatDisplayDateTime(NYE, locale, UTC)).toBe(NYE.toLocaleString(locale, UTC))
+ expect(formatDisplayDateTime(NYE, locale, opts, 'auto')).toBe(NYE.toLocaleString(locale, opts));
+ expect(formatDisplayDateTime(NYE, locale, opts, 'nope')).toBe(NYE.toLocaleString(locale, opts));
+ expect(formatDisplayDateTime(NYE, locale, UTC)).toBe(NYE.toLocaleString(locale, UTC));
}
- })
+ });
it('FE-UTIL-DATEFMT-011: the date follows the format, the time of day stays Intl', () => {
- const opts: Intl.DateTimeFormatOptions = { ...NUMERIC, hour: '2-digit', minute: '2-digit' }
- const time = NYE.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', timeZone: 'UTC' })
- expect(formatDisplayDateTime(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe(`2026-12-31 ${time}`)
- const hour12 = { ...opts, hour12: false }
- const time24 = NYE.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', hour12: false, timeZone: 'UTC' })
- expect(formatDisplayDateTime(NYE, 'en-US', hour12, 'DD.MM.YYYY')).toBe(`31.12.2026 ${time24}`)
- })
+ const opts: Intl.DateTimeFormatOptions = { ...NUMERIC, hour: '2-digit', minute: '2-digit' };
+ const time = NYE.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', timeZone: 'UTC' });
+ expect(formatDisplayDateTime(NYE, 'en-US', opts, 'YYYY-MM-DD')).toBe(`2026-12-31 ${time}`);
+ const hour12 = { ...opts, hour12: false };
+ const time24 = NYE.toLocaleTimeString('en-US', {
+ hour: '2-digit',
+ minute: '2-digit',
+ hour12: false,
+ timeZone: 'UTC',
+ });
+ expect(formatDisplayDateTime(NYE, 'en-US', hour12, 'DD.MM.YYYY')).toBe(`31.12.2026 ${time24}`);
+ });
it('FE-UTIL-DATEFMT-012: without options it writes the date and the default time', () => {
expect(formatDisplayDateTime(NYE, 'en-US', UTC, 'DD/MM/YYYY')).toBe(
`31/12/2026 ${NYE.toLocaleTimeString('en-US', UTC)}`
- )
- })
+ );
+ });
it('FE-UTIL-DATEFMT-013: time-only options are passed through untouched', () => {
- const opts: Intl.DateTimeFormatOptions = { hour: '2-digit', minute: '2-digit', timeZone: 'UTC' }
- expect(formatDisplayDateTime(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(NYE.toLocaleString('de-DE', opts))
- })
+ const opts: Intl.DateTimeFormatOptions = { hour: '2-digit', minute: '2-digit', timeZone: 'UTC' };
+ expect(formatDisplayDateTime(NYE, 'de-DE', opts, 'YYYY-MM-DD')).toBe(NYE.toLocaleString('de-DE', opts));
+ });
it('FE-UTIL-DATEFMT-014: date-only options give just the date, named dates stay Intl', () => {
- expect(formatDisplayDateTime(NYE, 'en-US', NUMERIC, 'YYYY/MM/DD')).toBe('2026/12/31')
- const named: Intl.DateTimeFormatOptions = { weekday: 'short', day: 'numeric', month: 'short', hour: '2-digit', timeZone: 'UTC' }
- expect(formatDisplayDateTime(NYE, 'en-US', named, 'YYYY-MM-DD')).toBe(NYE.toLocaleString('en-US', named))
- })
- })
+ expect(formatDisplayDateTime(NYE, 'en-US', NUMERIC, 'YYYY/MM/DD')).toBe('2026/12/31');
+ const named: Intl.DateTimeFormatOptions = {
+ weekday: 'short',
+ day: 'numeric',
+ month: 'short',
+ hour: '2-digit',
+ timeZone: 'UTC',
+ };
+ expect(formatDisplayDateTime(NYE, 'en-US', named, 'YYYY-MM-DD')).toBe(NYE.toLocaleString('en-US', named));
+ });
+ });
describe('displayDateFormatter', () => {
it('FE-UTIL-DATEFMT-015: auto behaves like Intl.DateTimeFormat', () => {
- const intl = new Intl.DateTimeFormat('en-US', NUMERIC)
- expect(displayDateFormatter('en-US', NUMERIC, 'auto').format(NYE)).toBe(intl.format(NYE))
- expect(displayDateFormatter('en-US', NUMERIC).format(NYE.getTime())).toBe(intl.format(NYE))
- })
+ const intl = new Intl.DateTimeFormat('en-US', NUMERIC);
+ expect(displayDateFormatter('en-US', NUMERIC, 'auto').format(NYE)).toBe(intl.format(NYE));
+ expect(displayDateFormatter('en-US', NUMERIC).format(NYE.getTime())).toBe(intl.format(NYE));
+ });
it('FE-UTIL-DATEFMT-016: numeric dates follow the format, for Date and timestamp alike', () => {
- const f = displayDateFormatter('en-US', NUMERIC, 'DD.MM.YYYY')
- expect(f.format(NYE)).toBe('31.12.2026')
- expect(f.format(NYE.getTime())).toBe('31.12.2026')
- const withTime = displayDateFormatter('en-US', { ...NUMERIC, hour: '2-digit', minute: '2-digit' }, 'YYYY-MM-DD')
+ const f = displayDateFormatter('en-US', NUMERIC, 'DD.MM.YYYY');
+ expect(f.format(NYE)).toBe('31.12.2026');
+ expect(f.format(NYE.getTime())).toBe('31.12.2026');
+ const withTime = displayDateFormatter('en-US', { ...NUMERIC, hour: '2-digit', minute: '2-digit' }, 'YYYY-MM-DD');
expect(withTime.format(NYE)).toBe(
`2026-12-31 ${NYE.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', timeZone: 'UTC' })}`
- )
- })
+ );
+ });
it('FE-UTIL-DATEFMT-017: a named month is left to Intl', () => {
- const opts: Intl.DateTimeFormatOptions = { day: 'numeric', month: 'long', timeZone: 'UTC' }
- expect(displayDateFormatter('de-DE', opts, 'YYYY-MM-DD').format(NYE)).toBe(new Intl.DateTimeFormat('de-DE', opts).format(NYE))
- })
- })
+ const opts: Intl.DateTimeFormatOptions = { day: 'numeric', month: 'long', timeZone: 'UTC' };
+ expect(displayDateFormatter('de-DE', opts, 'YYYY-MM-DD').format(NYE)).toBe(
+ new Intl.DateTimeFormat('de-DE', opts).format(NYE)
+ );
+ });
+ });
describe('dateFieldOrder, dateLayout and isNumericDate', () => {
it('FE-UTIL-DATEFMT-018: a chosen format sets the order, auto asks the language', () => {
- expect(dateFieldOrder('en-US', 'DD.MM.YYYY')).toEqual(['day', 'month', 'year'])
- expect(dateFieldOrder('de-DE', 'MM/DD/YYYY')).toEqual(['month', 'day', 'year'])
- expect(dateFieldOrder('en-US', 'YYYY/MM/DD')).toEqual(['year', 'month', 'day'])
- expect(dateFieldOrder('de-DE', 'auto')).toEqual(['day', 'month', 'year'])
- expect(dateFieldOrder('en-US')).toEqual(['month', 'day', 'year'])
- expect(dateFieldOrder('ko-KR', null)).toEqual(['year', 'month', 'day'])
- })
+ expect(dateFieldOrder('en-US', 'DD.MM.YYYY')).toEqual(['day', 'month', 'year']);
+ expect(dateFieldOrder('de-DE', 'MM/DD/YYYY')).toEqual(['month', 'day', 'year']);
+ expect(dateFieldOrder('en-US', 'YYYY/MM/DD')).toEqual(['year', 'month', 'day']);
+ expect(dateFieldOrder('de-DE', 'auto')).toEqual(['day', 'month', 'year']);
+ expect(dateFieldOrder('en-US')).toEqual(['month', 'day', 'year']);
+ expect(dateFieldOrder('ko-KR', null)).toEqual(['year', 'month', 'day']);
+ });
it('FE-UTIL-DATEFMT-019: dateLayout knows the five formats only, isNumericDate spots names', () => {
- expect(dateLayout('DD/MM/YYYY')).toEqual({ order: ['day', 'month', 'year'], separator: '/' })
- expect(dateLayout('auto')).toBeNull()
- expect(dateLayout('nope')).toBeNull()
- expect(dateLayout(undefined)).toBeNull()
- expect(isNumericDate()).toBe(true)
- expect(isNumericDate({ month: '2-digit' })).toBe(true)
- expect(isNumericDate({ month: 'short' })).toBe(false)
- expect(isNumericDate({ weekday: 'long' })).toBe(false)
- expect(isNumericDate({ era: 'short' })).toBe(false)
- expect(isNumericDate({ dateStyle: 'short' })).toBe(true)
- expect(isNumericDate({ dateStyle: 'long' })).toBe(false)
- })
- })
+ expect(dateLayout('DD/MM/YYYY')).toEqual({ order: ['day', 'month', 'year'], separator: '/' });
+ expect(dateLayout('auto')).toBeNull();
+ expect(dateLayout('nope')).toBeNull();
+ expect(dateLayout(undefined)).toBeNull();
+ expect(isNumericDate()).toBe(true);
+ expect(isNumericDate({ month: '2-digit' })).toBe(true);
+ expect(isNumericDate({ month: 'short' })).toBe(false);
+ expect(isNumericDate({ weekday: 'long' })).toBe(false);
+ expect(isNumericDate({ era: 'short' })).toBe(false);
+ expect(isNumericDate({ dateStyle: 'short' })).toBe(true);
+ expect(isNumericDate({ dateStyle: 'long' })).toBe(false);
+ });
+ });
describe('dateFormatOptions', () => {
it('FE-UTIL-DATEFMT-020: every choice is labelled by how it writes 31 December, auto with its example', () => {
@@ -188,8 +218,11 @@ describe('dateFormat (#2971)', () => {
{ value: 'DD.MM.YYYY', label: '31.12.2026' },
{ value: 'DD/MM/YYYY', label: '31/12/2026' },
{ value: 'MM/DD/YYYY', label: '12/31/2026' },
- ])
- expect(dateFormatOptions('de-DE', 'Automatisch')[0]).toEqual({ value: 'auto', label: 'Automatisch (31.12.2026)' })
- })
- })
-})
+ ]);
+ expect(dateFormatOptions('de-DE', 'Automatisch')[0]).toEqual({
+ value: 'auto',
+ label: 'Automatisch (31.12.2026)',
+ });
+ });
+ });
+});
diff --git a/client/src/utils/dateFormat.ts b/client/src/utils/dateFormat.ts
index bf244624c..ce562d38f 100644
--- a/client/src/utils/dateFormat.ts
+++ b/client/src/utils/dateFormat.ts
@@ -1,4 +1,4 @@
-import { DATE_FORMAT_VALUES, type DateFormat } from '@trek/shared'
+import { DATE_FORMAT_VALUES, type DateFormat } from '@trek/shared';
/**
* The user's date format (#2971), applied wherever a date is written in numbers.
@@ -14,11 +14,11 @@ import { DATE_FORMAT_VALUES, type DateFormat } from '@trek/shared'
* setting answers "how do I read 03/11", not "what is November called".
*/
-export type DateField = 'day' | 'month' | 'year'
+export type DateField = 'day' | 'month' | 'year';
interface DateLayout {
- order: DateField[]
- separator: string
+ order: DateField[];
+ separator: string;
}
const LAYOUTS: Record, DateLayout> = {
@@ -27,16 +27,16 @@ const LAYOUTS: Record, DateLayout> = {
'DD.MM.YYYY': { order: ['day', 'month', 'year'], separator: '.' },
'DD/MM/YYYY': { order: ['day', 'month', 'year'], separator: '/' },
'MM/DD/YYYY': { order: ['month', 'day', 'year'], separator: '/' },
-}
+};
/** The order and separator of a chosen format; null for 'auto' or anything unknown. */
export function dateLayout(format: string | null | undefined): DateLayout | null {
- if (!format || format === 'auto') return null
- return LAYOUTS[format as keyof typeof LAYOUTS] ?? null
+ if (!format || format === 'auto') return null;
+ return LAYOUTS[format as keyof typeof LAYOUTS] ?? null;
}
-const DATE_KEYS = ['day', 'month', 'year'] as const
-const TIME_KEYS = ['hour', 'minute', 'second', 'dayPeriod', 'fractionalSecondDigits'] as const
+const DATE_KEYS = ['day', 'month', 'year'] as const;
+const TIME_KEYS = ['hour', 'minute', 'second', 'dayPeriod', 'fractionalSecondDigits'] as const;
/**
* Whether these options write the date in numbers only: no weekday, no month
@@ -44,42 +44,42 @@ const TIME_KEYS = ['hour', 'minute', 'second', 'dayPeriod', 'fractionalSecondDig
* styles name the month.
*/
export function isNumericDate(opts: Intl.DateTimeFormatOptions = {}): boolean {
- if (opts.weekday || opts.era) return false
- if (opts.dateStyle) return opts.dateStyle === 'short'
- return !opts.month || opts.month === 'numeric' || opts.month === '2-digit'
+ if (opts.weekday || opts.era) return false;
+ if (opts.dateStyle) return opts.dateStyle === 'short';
+ return !opts.month || opts.month === 'numeric' || opts.month === '2-digit';
}
const hasAny = (opts: Intl.DateTimeFormatOptions, keys: readonly string[]) =>
- keys.some((key) => (opts as Record)[key] !== undefined)
+ keys.some((key) => (opts as Record)[key] !== undefined);
/** The date in the layout's order, each field the options ask for (all three when they name none). */
function numericDate(date: Date, opts: Intl.DateTimeFormatOptions, layout: DateLayout): string {
- const named = opts.dateStyle ? DATE_KEYS : DATE_KEYS.filter((key) => opts[key] !== undefined)
- const fields = named.length > 0 ? named : DATE_KEYS
+ const named = opts.dateStyle ? DATE_KEYS : DATE_KEYS.filter((key) => opts[key] !== undefined);
+ const fields = named.length > 0 ? named : DATE_KEYS;
const parts = new Intl.DateTimeFormat('en-US', {
timeZone: opts.timeZone,
year: 'numeric',
month: '2-digit',
day: '2-digit',
numberingSystem: 'latn',
- }).formatToParts(date)
- const value = (type: DateField) => parts.find((part) => part.type === type)?.value ?? ''
- const shortYear = opts.year === '2-digit'
+ }).formatToParts(date);
+ const value = (type: DateField) => parts.find((part) => part.type === type)?.value ?? '';
+ const shortYear = opts.year === '2-digit';
return layout.order
.filter((field) => (fields as readonly string[]).includes(field))
.map((field) => (field === 'year' && shortYear ? value('year').slice(-2) : value(field)))
- .join(layout.separator)
+ .join(layout.separator);
}
/** Only the time-of-day options, for the clock part beside a numeric date. */
function timeOptions(opts: Intl.DateTimeFormatOptions): Intl.DateTimeFormatOptions {
- const time: Intl.DateTimeFormatOptions = {}
+ const time: Intl.DateTimeFormatOptions = {};
for (const key of [...TIME_KEYS, 'hour12', 'hourCycle', 'timeZone', 'timeZoneName'] as const) {
- const value = (opts as Record)[key]
- if (value !== undefined) (time as Record)[key] = value
+ const value = (opts as Record)[key];
+ if (value !== undefined) (time as Record)[key] = value;
}
- if (opts.timeStyle) time.timeStyle = opts.timeStyle
- return time
+ if (opts.timeStyle) time.timeStyle = opts.timeStyle;
+ return time;
}
/**
@@ -92,20 +92,20 @@ export function formatDisplayDate(
opts: Intl.DateTimeFormatOptions = {},
format?: string | null
): string {
- const layout = dateLayout(format)
- if (!layout || Number.isNaN(date.getTime())) return date.toLocaleDateString(locale, opts)
+ const layout = dateLayout(format);
+ if (!layout || Number.isNaN(date.getTime())) return date.toLocaleDateString(locale, opts);
if (opts.weekday && isNumericWithWeekday(opts)) {
- const weekday = date.toLocaleDateString(locale, { weekday: opts.weekday, timeZone: opts.timeZone })
- return `${weekday}, ${numericDate(date, opts, layout)}`
+ const weekday = date.toLocaleDateString(locale, { weekday: opts.weekday, timeZone: opts.timeZone });
+ return `${weekday}, ${numericDate(date, opts, layout)}`;
}
- if (!isNumericDate(opts)) return date.toLocaleDateString(locale, opts)
- return numericDate(date, opts, layout)
+ if (!isNumericDate(opts)) return date.toLocaleDateString(locale, opts);
+ return numericDate(date, opts, layout);
}
/** A weekday beside a date that is otherwise all numbers ("Tue, 03.11.2026"). */
function isNumericWithWeekday(opts: Intl.DateTimeFormatOptions): boolean {
- if (opts.era || opts.dateStyle) return false
- return (opts.month === 'numeric' || opts.month === '2-digit') && opts.day !== undefined
+ if (opts.era || opts.dateStyle) return false;
+ return (opts.month === 'numeric' || opts.month === '2-digit') && opts.day !== undefined;
}
/**
@@ -119,15 +119,15 @@ export function formatDisplayDateTime(
opts: Intl.DateTimeFormatOptions = {},
format?: string | null
): string {
- const layout = dateLayout(format)
- const named = hasAny(opts, DATE_KEYS) || !!opts.dateStyle
- const timed = hasAny(opts, TIME_KEYS) || !!opts.timeStyle
- if (!layout || !isNumericDate(opts) || Number.isNaN(date.getTime())) return date.toLocaleString(locale, opts)
- if (!named && timed) return date.toLocaleString(locale, opts)
- const day = numericDate(date, opts, layout)
- if (named && !timed) return day
- const time = date.toLocaleTimeString(locale, timed ? timeOptions(opts) : { timeZone: opts.timeZone })
- return `${day} ${time}`
+ const layout = dateLayout(format);
+ const named = hasAny(opts, DATE_KEYS) || !!opts.dateStyle;
+ const timed = hasAny(opts, TIME_KEYS) || !!opts.timeStyle;
+ if (!layout || !isNumericDate(opts) || Number.isNaN(date.getTime())) return date.toLocaleString(locale, opts);
+ if (!named && timed) return date.toLocaleString(locale, opts);
+ const day = numericDate(date, opts, layout);
+ if (named && !timed) return day;
+ const time = date.toLocaleTimeString(locale, timed ? timeOptions(opts) : { timeZone: opts.timeZone });
+ return `${day} ${time}`;
}
/**
@@ -139,41 +139,44 @@ export function displayDateFormatter(
opts: Intl.DateTimeFormatOptions = {},
format?: string | null
): { format: (date: Date | number) => string } {
- const intl = new Intl.DateTimeFormat(locale, opts)
- const layout = dateLayout(format)
- if (!layout || !isNumericDate(opts)) return { format: (date) => intl.format(date) }
+ const intl = new Intl.DateTimeFormat(locale, opts);
+ const layout = dateLayout(format);
+ if (!layout || !isNumericDate(opts)) return { format: (date) => intl.format(date) };
return {
format: (date) => {
- const value = typeof date === 'number' ? new Date(date) : date
+ const value = typeof date === 'number' ? new Date(date) : date;
return hasAny(opts, TIME_KEYS) || opts.timeStyle
? formatDisplayDateTime(value, locale, opts, format)
- : formatDisplayDate(value, locale, opts, format)
+ : formatDisplayDate(value, locale, opts, format);
},
- }
+ };
}
/** The order the fields of a typed date are read in: the chosen format's, or the language's. */
export function dateFieldOrder(locale: string | undefined, format?: string | null): DateField[] {
- const layout = dateLayout(format)
- if (layout) return layout.order
+ const layout = dateLayout(format);
+ if (layout) return layout.order;
return new Intl.DateTimeFormat(locale, { day: 'numeric', month: 'numeric', year: 'numeric' })
.formatToParts(new Date(2001, 5, 15))
.filter((part) => part.type === 'day' || part.type === 'month' || part.type === 'year')
- .map((part) => part.type as DateField)
+ .map((part) => part.type as DateField);
}
/** 31 December: no day of it reads as a month, so every option's example is unambiguous. */
-const SAMPLE = new Date(Date.UTC(2026, 11, 31))
+const SAMPLE = new Date(Date.UTC(2026, 11, 31));
/**
* The choices of the setting, each labelled by how it writes 31 December, and
* 'auto' by `autoLabel` with the language's own way in brackets.
*/
-export function dateFormatOptions(locale: string | undefined, autoLabel: string): { value: DateFormat; label: string }[] {
+export function dateFormatOptions(
+ locale: string | undefined,
+ autoLabel: string
+): { value: DateFormat; label: string }[] {
const example = (format: DateFormat) =>
- formatDisplayDate(SAMPLE, locale, { day: '2-digit', month: '2-digit', year: 'numeric', timeZone: 'UTC' }, format)
+ formatDisplayDate(SAMPLE, locale, { day: '2-digit', month: '2-digit', year: 'numeric', timeZone: 'UTC' }, format);
return DATE_FORMAT_VALUES.map((value) => ({
value,
label: value === 'auto' ? `${autoLabel} (${example(value)})` : example(value),
- }))
+ }));
}