JavaScript Internationalization with Intl — Code Completion

Create a US number formatter

javascript Your answer

const formatter = new Intl.NumberFormat("en-US");
const result =  formatter.format(1234567.89);

Press Ctrl⌘Enter to check your answer

Create a currency formatter

javascript Your answer

const formatter = new Intl.NumberFormat("en-US", { style: "currency", currency: "USD" });
const result =  formatter.format(42.5);

Press Ctrl⌘Enter to check your answer

Create a UTC date formatter

javascript Your answer

const formatter = new Intl.DateTimeFormat("en-US", { dateStyle: "medium", timeZone: "UTC" });
const result =  formatter.format(new Date("2026-09-27T12:00:00Z"));

Press Ctrl⌘Enter to check your answer

Create a locale-aware comparator

javascript Your answer

const collator = new Intl.Collator("en", { sensitivity: "base" });
const result =  collator.compare("resume", "résumé");

Press Ctrl⌘Enter to check your answer

Format a conjunction list

javascript Your answer

const formatter = new Intl.ListFormat("en", { type: "conjunction" });
const result =  formatter.format(["one", "two", "three"]);

Press Ctrl⌘Enter to check your answer

Select a plural category

javascript Your answer

const rules = new Intl.PluralRules("en");
const result =  rules.select(2);

Press Ctrl⌘Enter to check your answer

Format relative time

javascript Your answer

const formatter = new Intl.RelativeTimeFormat("en", { numeric: "auto" });
const result =  formatter.format(-1, "day");

Press Ctrl⌘Enter to check your answer

Get structured number parts

javascript Your answer

const formatter = new Intl.NumberFormat("en-US", { style: "currency", currency: "USD" });
const result =  formatter.formatToParts(12.5);

Press Ctrl⌘Enter to check your answer