Here are some cool uses of the JavaScript Intl API.
Formatting Dates
const date = new Date(Date.now());
new Intl.DateTimeFormat("en-US", {
timeZone: "America/Los_Angeles",
minute: "numeric",
hour: "numeric",
}).format(date);
// 9:45 AM (returns the current time in that timeZone)
Formatting Numbers
In the US the spelling "liter" is used whereas in the UK "litre" is used.
new Intl.NumberFormat("en-GB", {
style: "unit",
unit: "liter",
unitDisplay: "long",
}).format(1); // '1 litre'
Formatting Lists
const list = ["Motorcycle", "Bus", "Car"];
new Intl.ListFormat(
"en-US",
{ style: "long", type: "conjunction" }
).format(list); // 'Motorcycle, Bus, and Car'
Language Sensitive String Comparison
['Z', 'a', 'z', 'ä'].sort();
// Expected output: Array ['Z', 'a', 'z', 'ä']
['Z', 'a', 'z', 'ä'].sort(new Intl.Collator('de').compare);
// Expected output: Array ["a", "ä", "z", "Z"]