Intl: the locale and timeZone options are ignored (output is always en-US / UTC) #55

const show = async (k: string, f: () => unknown) => { let v; try { v = await Promise.race([Promise.resolve().then(f), new Promise((r) => setTimeout(() => r("NEVER SETTLED (2000 ms)"), 2000))]); } catch (e: any) { v = "THROWS " + e.name + ": " + String(e.message).slice(0, 100); } console.log(k.padEnd(52) + JSON.stringify(v)); };
(async () => {
  await show("Intl.NumberFormat en-US 1234567.891", () => new Intl.NumberFormat("en-US").format(1234567.891));
  await show("Intl.NumberFormat de-DE EUR", () => new Intl.NumberFormat("de-DE", { style: "currency", currency: "EUR" }).format(1234.5));
  await show("Intl.NumberFormat percent", () => new Intl.NumberFormat("en-US", { style: "percent", maximumFractionDigits: 1 }).format(0.1234));
  await show("Intl.NumberFormat compact", () => new Intl.NumberFormat("en-US", { notation: "compact" }).format(1234567));
  await show("Intl.DateTimeFormat en-US UTC medium/short", () => new Intl.DateTimeFormat("en-US", { timeZone: "UTC", dateStyle: "medium", timeStyle: "short" }).format(new Date(0)));
  await show("Intl.DateTimeFormat Asia/Tokyo", () => new Intl.DateTimeFormat("en-US", { timeZone: "Asia/Tokyo", hour: "numeric", minute: "2-digit", hour12: false }).format(new Date(0)));
  await show("Date#toLocaleDateString en-US UTC", () => new Date(0).toLocaleDateString("en-US", { timeZone: "UTC" }));
  await show("Date#toLocaleString de-DE UTC", () => new Date(0).toLocaleString("de-DE", { timeZone: "UTC" }));
  await show("Intl.PluralRules en cardinal/ordinal", () => [new Intl.PluralRules("en-US").select(1), new Intl.PluralRules("en-US", { type: "ordinal" }).select(2), new Intl.PluralRules("ar").select(3)]);
  await show("Intl.Collator('de') sort", () => ["b", "a", "ä", "z"].sort(new Intl.Collator("de").compare));
  await show("Intl.Collator numeric", () => ["a10", "a2", "a1"].sort(new Intl.Collator("en", { numeric: true }).compare));
  await show("Intl.Segmenter grapheme", () => [...new Intl.Segmenter("en", { granularity: "grapheme" }).segment("a👍🏽é")].map((s) => s.segment));
  await show("Intl.Segmenter word", () => [...new Intl.Segmenter("en", { granularity: "word" }).segment("Hi there, you")].filter((s) => s.isWordLike).map((s) => s.segment));
  await show("(1234.5).toLocaleString('en-US')", () => (1234.5).toLocaleString("en-US"));
  await show("(1e21).toLocaleString('en-US')", () => (1e21).toLocaleString("en-US"));
  await show("(1234567.891).toLocaleString('de-DE')", () => (1234567.891).toLocaleString("de-DE"));
  await show("'a'.localeCompare('B','en',{sensitivity:'base'})", () => ["a".localeCompare("B", "en", { sensitivity: "base" }), "a".localeCompare("A", "en", { sensitivity: "base" })]);
})();