以小时为单位获取时区差异
我想通过 Node.js moment 模块获取纽约和香港之间的时区差异.我已经做了一些前期工作.
I would like to get the timezone difference between New York and Hong Kong with Node.js moment module. I have done some preliminary work.
var NewYork_time_hr = moment().tz("America/New_York").format('HH');
var HongKong_time_hr = moment().tz("Asia/Hong_Kong").format('HH');
然后我可以继续编写一个函数来计算两个时区之间的时间差(以小时为单位).我希望有一个更简单的方法.
I can then proceed to write a function to calculate the difference between the 2 timezones in hours. I was hoping for a simpler method.
有没有更优雅、更简单的方式来使用矩库?
Is there a more elegant and simpler way to do it with moment library?
推荐答案
不确定更简单"，但更正确(因为并非所有时区都相隔一小时):
Not sure about "simpler", but more correct (since not all timezones are a full hour from each other):
// get the current time so we know which offset to take (DST is such bullkitten)
var now = moment.utc();
// get the zone offsets for this time, in minutes
var NewYork_tz_offset = moment.tz.zone("America/New_York").offset(now);
var HongKong_tz_offset = moment.tz.zone("Asia/Hong_Kong").offset(now);
// calculate the difference in hours
console.log((NewYork_tz_offset - HongKong_tz_offset) / 60);<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment.min.js"></script>
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