Хелперы для работы с датами + polyfill для свежего API 2025 года

src/lib/util/Dates.ts

@@ -0,0 +1,42 @@
+import { shouldPolyfill } from '@formatjs/intl-durationformat/should-polyfill'
+if (shouldPolyfill()) {
+    import('@formatjs/intl-durationformat/polyfill-force');
+}
+
+export const dateFormatShort = new Intl.DateTimeFormat(undefined, {
+    month: 'short',
+    day: 'numeric',
+    year: 'numeric'
+});
+
+export const dateFormatLong = new Intl.DateTimeFormat(undefined, {
+    month: 'short',
+    day: 'numeric',
+    year: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit'
+});
+
+export const dateDurationLong = new Intl.DurationFormat(undefined, {
+    style: "long"
+});
+
+export const dateDurationLongBackup = new Intl.DurationFormat(undefined, {
+    style: "long",
+    seconds: "long"
+});
+
+export const durationHumanReadable = (a: Date, b: Date) => durationHumanReadableMillis(b.valueOf() - a.valueOf());
+
+export function durationHumanReadableMillis(dur: number): string {
+    dur = Math.max(dur, 0);
+    const seconds = dur / 1000;
+    const minutes = dur / (1000 * 60);
+    const hours = dur / (1000 * 60 * 60);
+    const days = dur / (1000 * 60 * 60 * 24);
+
+    const formatObject = { days: Math.floor(days), hours: Math.floor(hours) % 24, minutes: Math.floor(minutes) % 60, seconds: Math.floor(seconds) % 60 };
+    const result = dateDurationLong.format(formatObject);
+    // Если на выходе получаем пустую строку, то хоть выведем 0 секунд
+    return result === '' ? dateDurationLongBackup.format(formatObject) : result;
+}