如何获取moment.js以UTC时间（以毫秒为单位）输出格式化时间？

Question

var end, moment, timeFormat;
moment = require('moment');
end = moment.utc('2016-11-29T23:59:59.999');
console.dir(end.format());
timeFormat = 'YYYY-MM-DDThh:mm:ss.SSS';
console.dir(end.format(timeFormat));

Output:

'2016-11-29T23:59:59Z'
'2016-11-29T11:59:59.999'

What I really need:

'2016-11-29T23:59:59.999'

Why is there a 12 hour difference between those 2 outputs? I could just add 12 hours to it, but that is hacky. I don't understand why moment is suddenly subtracting 12 hours from my date as soon as I give it a format. Seems unlikely this is a bug; more likely me misunderstanding what Moment is doing.

My timezone is GMT+8.

Answer 1

Because you are using hh (01-12) instead of HH (00-23); see the Moment.js format() docs.

Here is a working example:

 var end, wrongTimeFormat, timeFormat; end = moment.utc('2016-11-29T23:59:59.999'); console.dir(end.format()); wrongTimeFormat = 'YYYY-MM-DDThh:mm:ss.SSS'; timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS'; console.dir(end.format(wrongTimeFormat)); console.dir(end.format(timeFormat)); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.0/moment.min.js"></script> 

Answer 2

According to the Moment.js docs , lowercase hh will produce hours in the 01-12 range, which are meant to be used in conjunction with am/pm. You need capital HH (00-23, "military time"), as in

timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS'

Answer 3

使用大写HH

timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS';