Intl.DateTimeFormat.prototype.formatRange()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2017.

Intl.DateTimeFormat.prototype.formatRange() は、 Intl.DateTimeFormat オブジェクトがインスタンス化されたときに提供された localeoptions に基づいて、もっとも簡明な方法で日付の範囲を書式化します。

試してみましょう

const options1 = {
  weekday: "long",
  year: "numeric",
  month: "long",
  day: "numeric",
};
const options2 = { year: "2-digit", month: "numeric", day: "numeric" };

const startDate = new Date(Date.UTC(2007, 0, 10, 10, 0, 0));
const endDate = new Date(Date.UTC(2008, 0, 10, 11, 0, 0));

const dateTimeFormat = new Intl.DateTimeFormat("en", options1);
console.log(dateTimeFormat.formatRange(startDate, endDate));
// Expected output: "Wednesday, January 10, 2007 – Thursday, January 10, 2008"

const dateTimeFormat2 = new Intl.DateTimeFormat("en", options2);
console.log(dateTimeFormat2.formatRange(startDate, endDate));
// Expected output: "1/10/07 – 1/10/08"

構文

js
formatRange(startDate, endDate);

基本的な formatRange の使用

このメソッドは 2 つの Date を受け取り、 Intl.DateTimeFormat オブジェクトがインスタンス化されたときに提供された localeoptions に基づいて日付の範囲を書式化します。

js
let date1 = new Date(Date.UTC(2007, 0, 10, 10, 0, 0));
let date2 = new Date(Date.UTC(2007, 0, 10, 11, 0, 0));
let date3 = new Date(Date.UTC(2007, 0, 20, 10, 0, 0));
// > 'Wed, 10 Jan 2007 10:00:00 GMT'
// > 'Wed, 10 Jan 2007 11:00:00 GMT'
// > 'Sat, 20 Jan 2007 10:00:00 GMT'

let fmt1 = new Intl.DateTimeFormat("en", {
  year: "2-digit",
  month: "numeric",
  day: "numeric",
  hour: "numeric",
  minute: "numeric",
});
console.log(fmt1.format(date1));
console.log(fmt1.formatRange(date1, date2));
console.log(fmt1.formatRange(date1, date3));
// > '1/10/07, 10:00 AM'
// > '1/10/07, 10:00 – 11:00 AM'
// > '1/10/07, 10:00 AM – 1/20/07, 10:00 AM'

let fmt2 = new Intl.DateTimeFormat("en", {
  year: "numeric",
  month: "short",
  day: "numeric",
});
console.log(fmt2.format(date1));
console.log(fmt2.formatRange(date1, date2));
console.log(fmt2.formatRange(date1, date3));
// > 'Jan 10, 2007'
// > 'Jan 10, 2007'
// > 'Jan 10 – 20, 2007'

仕様書

Specification
ECMAScript® 2025 Internationalization API Specification
# sec-intl.datetimeformat.prototype.formatRange

ブラウザーの互換性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
formatRange

Legend

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Full support
Full support
See implementation notes.

関連情報