javascript 在Javascript中从时区获取UTC偏移量
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/20712419/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Get utc offset from timezone in Javascript
提问by user3124032
I need a Javascript function that given a timezone, returns the current utc offset.
我需要一个给定时区的 Javascript 函数，返回当前的 utc 偏移量。
For example, theFuncIneed('US/Eastern') -> 240
例如，theFuncIneed('US/Eastern') -> 240
Any idea?
任何的想法？
Thanks
谢谢
回答by Matt Johnson-Pint
In general, this is not possible.
一般来说，这是不可能的。
US/Easternis an identifier for a time zone. (It's actually an alias toAmerica/New_York, which is the real identifier.)240is a time zone offset. It's more commonly written as-04:00(Invert the sign, divide by 60).The US Eastern Time Zone is comprised of both Eastern Standard Time, which has the offset of
-05:00and Eastern Daylight Time, which has the offset of-04:00.
US/Eastern是时区的标识符。（它实际上是 的别名America/New_York，它是真正的标识符。）240是时区偏移量。更常见的写法是-04:00（反转符号，除以 60）。美国东部时区由偏移量为 的东部标准时间
-05:00和偏移量为 的东部夏令时组成-04:00。
So it is not at all accurate to say US/Eastern= 240. Please read the timezone tag wiki, especially the section titled "Time Zone != Offset".
所以说US/Eastern= 240一点也不准确。请阅读时区标签维基，尤其是标题为“时区！= 偏移”的部分。
Now you did ask for the currentoffset, which ispossible. If you supply a date+time reference, then you can resolve this.
现在您确实要求了当前偏移量，这是可能的。如果您提供日期+时间参考，则可以解决此问题。
For the local time zone of the computer where the javascript code is executing, this is built in with
.getTimeZoneOffset()from any instance of aDateobject.But if you want it for a specifictime zone, then you will need to use one of the libraries I listed here.
对于执行 javascript 代码的计算机的本地时区，这是
.getTimeZoneOffset()从Date对象的任何实例内置的。但是，如果您希望在特定时区使用它，则需要使用我在此处列出的库之一。
回答by Alexandru R
You can do this using moment.js
你可以使用moment.js来做到这一点
moment.tz('timezone name').utcOffset()
moment.tz('时区名称').utcOffset()
Although this involves using moment-timezone.js
虽然这涉及使用 moment-timezone.js
