Javascript 使用偏移值获取时区缩写

Get timezone abbreviation using offset value

提问by thetallweeks

Using moment.js (with moment-timezone), I want to get the timezone abbreviation (e.g. PST) for the current locale.

使用moment.js（带有moment-timezone），我想获取当前语言环境的时区缩写（例如PST）。

var now = Date.now(); // 1423254073931
var zone = moment(now).zone(); // 480
var timezone = 

How do I get the timezone abbreviation? All of the examples I have seen in the docs and elsewhere pick a specific region like "America/New_York".

我如何获得时区缩写？我在文档和其他地方看到的所有示例都选择了一个特定的区域，例如"America/New_York".

From the docs, it looks like I can get the information out of the Zone Objectwith zone.abbr(timestamp)but I'm not sure how to access the zone object.

从文档中，看起来我可以从Zone 对象中获取信息，zone.abbr(timestamp)但我不确定如何访问 zone 对象。

JSFiddle

JSFiddle

回答by Matt Johnson-Pint

The title and the question are different. In the title, you ask how to get it using the offset - which would not be possible. There are many time zones that share the same offset, so it isn't possible to distinguish a time zone abbreviation from an offset alone.

标题和问题不一样。在标题中，您询问如何使用偏移量来获取它 - 这是不可能的。有许多时区共享相同的偏移量，因此无法将时区缩写与单独的偏移量区分开来。

But in the question, you asked how to get the abbreviation for the current locale, for a specific timestamp.

但是在问题中，您询问了如何获取特定时间戳的当前语言环境的缩写。

The general problem is, there is no fully-reliable way to detect the current time zone. This is discussed in this answer. So moment-timezone can't deterministically tell which time zone should be loaded by default.

一般的问题是，没有完全可靠的方法来检测当前时区。这在这个答案中讨论。因此，moment-timezone 无法确定性地判断默认情况下应加载哪个时区。

There are some other options available though.

不过还有一些其他选项可用。

• In some browsers, the ECMAScript Internationalization APIextensions are supported on the toLocaleStringfunction of the Dateobject. When supported, you can do this (without moment):

  var d = new Date(); // or whatever date you have
  var tzName = d.toLocaleString('en', {timeZoneName:'short'}).split(' ').pop();
  

  In supported browsers, you'll get a value like "EST". You might want to do some sort of tests though, because it won't work in all browsers.

• You could use a script like jsTimeZoneDetectto guess at the local time zone. It's usuallycorrect, but not guaranteed. You could then pass that value to moment-timezone.

  var tzName = jstz.determine().name();
  var m = moment();
  var abbr = m.tz(tzName).zoneAbbr();  // or .format('z')
  

• There is also now built-in support for time zone detection/guessing in moment-timezone:

  var tzName = moment.tz.guess();
  var abbr = m.tz(tzName).zoneAbbr();  // or .format('z')
  

• 在某些浏览器中，对象的功能支持ECMAScript 国际化 API扩展。支持时，您可以执行此操作（无需时刻）：toLocaleStringDate

  var d = new Date(); // or whatever date you have
  var tzName = d.toLocaleString('en', {timeZoneName:'short'}).split(' ').pop();
  

  在支持的浏览器中，您将获得类似“EST”的值。不过，您可能想要进行某种测试，因为它不适用于所有浏览器。

• 您可以使用像jsTimeZoneDetect这样的脚本来猜测本地时区。它通常是正确的，但不能保证。然后您可以将该值传递给时刻时区。

  var tzName = jstz.determine().name();
  var m = moment();
  var abbr = m.tz(tzName).zoneAbbr();  // or .format('z')
  

• 现在还有对moment-timezone 中时区检测/猜测的内置支持：

  var tzName = moment.tz.guess();
  var abbr = m.tz(tzName).zoneAbbr();  // or .format('z')
  

回答by star18bit

Latest build of moment.js would give you timezone guess: PR#220for example: moment.tz.guess(); will result in 'America/New_York'

最新版本的 moment.js 会给你时区猜测： 例如PR#220：moment.tz.guess(); will result in 'America/New_York'