Date.prototype.toLocaleDateString()

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toLocaleDateString() 方法返回该日期对象日期部分的字符串,该字符串格式因不同语言而不同。新增的参数 locales 和 options 使程序能够指定使用哪种语言格式化规则,允许定制该方法的表现(behavior)。在旧版本浏览器中, localesoptions 参数被忽略,使用的语言环境和返回的字符串格式是各自独立实现的。

语法

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

参数

 查看浏览器兼容性小节,看下哪些浏览器支持 locales 和 options 参数,还可以参看例子: 检测 localesoptions 参数支持情况

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

例子

例子:使用toLocaleDateString

没有指定语言环境(locale)时,返回一个使用默认语言环境和格式设置(options)的格式化字符串。

var date = new Date(Date.UTC(2012, 11, 12, 3, 0, 0));

// toLocaleDateString without arguments depends on the implementation,
// the default locale, and the default time zone
date.toLocaleDateString();
// → "12/11/2012" if run in en-US locale with time zone America/Los_Angeles

例子:检测 localesoptions 参数支持情况

locales 和 options 参数不是所有的浏览器都支持。为了检测一种实现环境(implementation)是否支持它们,可以使用不合法的语言标签,如果实现环境支持该参数,则会抛出一个 RangeError 异常,反之会忽略参数。

function toLocaleDateStringSupportsLocales() {
    try {
        new Date().toLocaleDateString("i");
    } catch (e) {
        return e​.name === "RangeError";
    }
    return false;
}

例子:使用locales

下例展示了本地化日期格式的一些变化。为了在应用的用户界面得到某种语言的日期格式,必须确保使用 locales 参数指定了该语言(可能还需要设置某些回退语言)。

var 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
alert(date.toLocaleDateString("en-US"));
// → "12/19/2012"

// British English uses day-month-year order
alert(date.toLocaleDateString("en-GB"));
// → "20/12/2012"

// Korean uses year-month-day order
alert(date.toLocaleDateString("ko-KR"));
// → "2012. 12. 20."

// Arabic in most Arabic speaking countries uses real Arabic digits
alert(date.toLocaleDateString("ar-EG"));
// → "٢٠‏/١٢‏/٢٠١٢"

// for Japanese, applications may want to use the Japanese calendar,
// where 2012 was the year 24 of the Heisei era
alert(date.toLocaleDateString("ja-JP-u-ca-japanese"));
// → "24/12/20"

// when requesting a language that may not be supported, such as
// Balinese, include a fallback language, in this case Indonesian
alert(date.toLocaleDateString(["ban", "id"]));
// → "20/12/2012"

例子:使用options

可以使用 options 参数来自定义 toLocaleDateString 方法返回的字符串。

var date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));

// request a weekday along with a long date
var options = {weekday: "long", year: "numeric", month: "long", day: "numeric"};
alert(date.toLocaleDateString("de-DE", options));
// → "Donnerstag, 20. Dezember 2012"

// an application may want to use UTC and make that visible
options.timeZone = "UTC";
options.timeZoneName = "short";
alert(date.toLocaleDateString("en-US", options));
// → "Thursday, December 20, 2012, GMT"

性能

当格式化大量日期时,最好创建一个 Intl.DateTimeFormat 对象,然后使用该对象 format 属性提供的方法。

规范

规范版本 规范状态 注解
ECMAScript 3rd Edition. Implemented in JavaScript 1.0 Standard Initial definition.
ECMAScript 5.1 (ECMA-262)
Date.prototype.toLocaleDateString
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
Date.prototype.toLocaleDateString
Standard  
ECMAScript Internationalization API Specification, 1st Edition Standard Defines locales and options arguments.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
toLocaleDateStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5.5Opera Full support 5Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
IANA time zone names in timeZone optionChrome Full support 24Edge Full support 14Firefox Full support 52IE No support NoOpera Full support 15Safari Full support 6.1WebView Android Full support 4.4Chrome Android Full support 25Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 7Samsung Internet Android Full support 1.5nodejs Full support 0.12
localesChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support 4.4Chrome Android Full support 25Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 13.0.0
Full support 13.0.0
Partial support 0.12
Notes
Notes 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.
optionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support 4.4Chrome Android Full support 25Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support
See implementation notes.
See implementation notes.

相关链接