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

toLocaleString() method returns a string with a language sensitive representation of this date.

The new locales and options arguments let applications specify the language whose formatting conventions should be used and customize the behavior of the function.

In older implementations, which ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation-dependent.

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

dateObj.toLocaleString([locales[, options]])
					

参数

locales and options arguments customize the behavior of the function and let applications specify the language whose formatting conventions should be used. In implementations, which ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation dependent.

见 Intl.DateTimeFormat() 构造函数 for details on these parameters and how to use them.

The default value for each date-time component property is undefined . But, if the weekday , year , month ，和 day properties are all undefined , then year , month ，和 day are assumed to be "numeric" .

返回值

A string representing the given date according to language-specific conventions.

Performance

When formatting large numbers of dates, it is better to create an Intl.DateTimeFormat object and use the function provided by its format 特性。

范例

使用 toLocaleString()

In basic use without specifying a locale, a formatted string in the default locale and with default options is returned.

let date = new Date(Date.UTC(2012, 11, 12, 3, 0, 0));
// toLocaleString() without arguments depends on the
// implementation, the default locale, and the default time zone
console.log(date.toLocaleString());
// → "12/11/2012, 7:00:00 PM" if run in en-US locale with time zone America/Los_Angeles
					

Checking for support for locales and options arguments

locales and options arguments are not supported in all browsers yet. To check whether an implementation supports them already, you can use the requirement that illegal language tags are rejected with a RangeError exception:

function toLocaleStringSupportsLocales() {
  try {
    new Date().toLocaleString('i');
  } catch (e) {
    return e instanceof RangeError;
  }
  return false;
}
					

使用 locales

This example shows some of the variations in localized date and time formats. In order to get the format of the language used in the user interface of your application, make sure to specify that language (and possibly some fallback languages) using the locales argument:

let date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
// formats below assume the local time zone of the locale;
// America/Los_Angeles for the US
// US English uses month-day-year order and 12-hour time with AM/PM
console.log(date.toLocaleString('en-US'));
// → "12/19/2012, 7:00:00 PM"
// British English uses day-month-year order and 24-hour time without AM/PM
console.log(date.toLocaleString('en-GB'));
// → "20/12/2012 03:00:00"
// Korean uses year-month-day order and 12-hour time with AM/PM
console.log(date.toLocaleString('ko-KR'));
// → "2012. 12. 20. 오후 12:00:00"
// Arabic in most Arabic speaking countries uses real Arabic digits
console.log(date.toLocaleString('ar-EG'));
// → "٢٠‏/١٢‏/٢٠١٢ ٥:٠٠:٠٠ ص"
// for Japanese, applications may want to use the Japanese calendar,
// where 2012 was the year 24 of the Heisei era
console.log(date.toLocaleString('ja-JP-u-ca-japanese'));
// → "24/12/20 12:00:00"
// When requesting a language that may not be supported, such as
// Balinese, include a fallback language (in this case, Indonesian)
console.log(date.toLocaleString(['ban', 'id']));
// → "20/12/2012 11.00.00"
					

使用 options

The results provided by toLocaleString() can be customized using the options argument:

let date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
// request a weekday along with a long date
let options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };
console.log(date.toLocaleString('de-DE', options));
// → "Donnerstag, 20. Dezember 2012"
// an application may want to use UTC and make that visible
options.timeZone = 'UTC';
options.timeZoneName = 'short';
console.log(date.toLocaleString('en-US', options));
// → "Thursday, December 20, 2012, GMT"
// sometimes even the US needs 24-hour time
console.log(date.toLocaleString('en-US', { hour12: false }));
// → "12/19/2012, 19:00:00"
					

Avoid comparing formatted date values to static values

Most of the time, the formatting returned by toLocaleString() is consistent. However, this might change in the future, and isn't guaranteed for all 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 toLocaleString() to a static value:

"1/1/2019, 01:00:00" === new Date("2019-01-01T01:00:00Z").toLocaleString("en-US");
// 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 (ECMA-262) The definition of 'Date.prototype.toLocaleString' in that specification.
ECMAScript 国际化 API (ECMA-402) The definition of 'Date.prototype.toLocaleString' in that specification.

浏览器兼容性

The compatibility table in 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
toLocaleString	Chrome 1	Edge 12	Firefox 1	IE 3	Opera 3	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
IANA time zone names in timeZone option	Chrome 24	Edge 14	Firefox 52	IE No	Opera 15	Safari 6.1	WebView Android 4.4	Chrome Android 25	Firefox Android No	Opera Android 14	Safari iOS 7	Samsung Internet Android 1.5	nodejs 0.12
locales	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 13.0.0 13.0.0 部分支持 0.12 Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US . To make full ICU (locale) data available for versions prior to 13, see Node.js documentation on the --with-intl option and how to provide the data.
options	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

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

另请参阅

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

元数据

• 最后修改： May 20, 2020

相关话题

1. 标准内置对象
2. Date
3. 方法
   1. Date.UTC()
   2. Date.now()
   3. Date.parse()
   4. Date.prototype.getDate()
   5. Date.prototype.getDay()
   6. Date.prototype.getFullYear()
   7. Date.prototype.getHours()
   8. Date.prototype.getMilliseconds()
   9. Date.prototype.getMinutes()
   10. Date.prototype.getMonth()
   11. Date.prototype.getSeconds()
   12. Date.prototype.getTime()
   13. Date.prototype.getTimezoneOffset()
   14. Date.prototype.getUTCDate()
   15. Date.prototype.getUTCDay()
   16. Date.prototype.getUTCFullYear()
   17. Date.prototype.getUTCHours()
   18. Date.prototype.getUTCMilliseconds()
   19. Date.prototype.getUTCMinutes()
   20. Date.prototype.getUTCMonth()
   21. Date.prototype.getUTCSeconds()
   22. Date.prototype.getYear()
   23. Date.prototype.setDate()
   24. Date.prototype.setFullYear()
   25. Date.prototype.setHours()
   26. Date.prototype.setMilliseconds()
   27. Date.prototype.setMinutes()
   28. Date.prototype.setMonth()
   29. Date.prototype.setSeconds()
   30. Date.prototype.setTime()
   31. Date.prototype.setUTCDate()
   32. Date.prototype.setUTCFullYear()
   33. Date.prototype.setUTCHours()
   34. Date.prototype.setUTCMilliseconds()
   35. Date.prototype.setUTCMinutes()
   36. Date.prototype.setUTCMonth()
   37. Date.prototype.setUTCSeconds()
   38. Date.prototype.setYear()
   39. Date.prototype.toDateString()
   40. Date.prototype.toGMTString()
   41. Date.prototype.toISOString()
   42. Date.prototype.toJSON()
   43. Date.prototype.toLocaleDateString()
   44. Date.prototype.toLocaleString()
   45. Date.prototype.toLocaleTimeString()
   46. Date.prototype.toSource()
   47. Date.prototype.toString()
   48. Date.prototype.toTimeString()
   49. Date.prototype.toUTCString()
   50. Date.prototype.valueOf()
   51. Date.prototype[@@toPrimitive]
4. 继承：
5. Function
6. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
7. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
8. Object
9. 特性
   1. Object.prototype.__proto__
   2. Object.prototype.constructor
10. 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()