在此页

• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

Intl.DateTimeFormat.prototype.format() method formats a date according to the locale and formatting options of this Intl.DateTimeFormat 对象。

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

dateTimeFormat.format(date)
					

参数

date

The date to format.

描述

format getter formats a date into a string according to the locale and formatting options of this Intl.DateTimeFormat 对象。

范例

使用 format

使用 format getter function for formatting a single date, here for Serbia:

var options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };
var dateTimeFormat = new Intl.DateTimeFormat('sr-RS', options);
console.log(dateTimeFormat.format(new Date()));
// → "недеља, 7. април 2013."
					

使用 format with map

使用 format getter function for formatting all dates in an array. Note that the function is bound to the Intl.DateTimeFormat from which it was obtained, so it can be passed directly to Array.prototype.map() .

var a = [new Date(2012, 08), new Date(2012, 11), new Date(2012, 03)];
var options = { year: 'numeric', month: 'long' };
var dateTimeFormat = new Intl.DateTimeFormat('pt-BR', options);
var formatted = a.map(dateTimeFormat.format);
console.log(formatted.join('; '));
// → "setembro de 2012; dezembro de 2012; abril de 2012"
					

Avoid comparing formatted date values to static values

Most of the time, the formatting returned by format() is consistent. However, this might change in the future and isn't guaranteed for all the languages — output variations are by design and allowed by the specification. Most notably, the IE and Edge browsers insert bidirectional control characters around dates, so the output text will flow properly when concatenated with other text.

For this reason you cannot expect to be able to compare the results of format() to a static value:

let d = new Date("2019-01-01T00:00:00.000000Z");
let formattedDate = Intl.DateTimeFormat(undefined, {
  year: 'numeric',
  month: 'numeric',
  day: 'numeric',
  hour: 'numeric',
  minute: 'numeric',
  second: 'numeric'
}).format(d);
"1.1.2019, 01:00:00" === formattedDate;
// true in Firefox and others
// false in IE and Edge
					

注意 : See also this StackOverflow thread for more details and examples.

规范

规范
ECMAScript 国际化 API (ECMA-402) The definition of 'Intl.DateTimeFormat.format' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
format	Chrome 24	Edge 12	Firefox 29	IE 11	Opera 15	Safari 10	WebView Android 4.4	Chrome Android 25	Firefox Android 56	Opera Android 14	Safari iOS 10	Samsung Internet Android 1.5	nodejs 0.12 0.12 Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() 构造函数 了解更多细节。

图例

完整支持

完整支持

见实现注意事项。

另请参阅

• Intl.DateTimeFormat
• Date.prototype.toLocaleString()
• Date.prototype.toLocaleDateString()
• Date.prototype.toLocaleTimeString()

元数据

• 最后修改： Apr 21, 2020

相关话题

1. 标准内置对象
2. Intl
3. 方法
   1. Intl.getCanonicalLocales()
4. 相关页面：
5. Collator
6. DateTimeFormat
7. ListFormat
8. NumberFormat
9. PluralRules
10. RelativeTimeFormat
11. 继承：
12. Object
13. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
14. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()