如何在 javascript 中将时区偏移设为 ±hh:mm？

Question

I can get the Timezone offset with the following command as:

new Date().getTimezoneOffset() -> -330 and using moment

moment().utcOffset() as 330.

However, how do I get the format as ±hh:mm?

Answer 1

Are you trying to achieve this? If you prefer moment.js you can use .format for formatting date or time.

 const date = new Date(); let utc = moment(date).utcOffset() console.log(moment.utc(date).utcOffset(utc).format('h:mm A ZZ')) let utc2 = date.getTimezoneOffset(); console.log(moment.utc(date).utcOffset(utc2).format('h:mm A ZZ'))

 <script src="https://momentjs.com/downloads/moment.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.4/moment.min.js"></script>

Update: Is this according to your expected output?

 const date = new Date(); let utc = moment(date).utcOffset() console.log(moment(date).utcOffset(utc).format())

 <script src="https://momentjs.com/downloads/moment.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.4/moment.min.js"></script>

Reference: Display

Answer 2

You won't be able to do it without a third-party library or manually converting the value with functionality.

You can do something like:

const offset = new Date().getTimezoneOffset();
let offsetHours = parseInt(Math.abs(offset/60));
let offsetMins = Math.abs(offset%60);
let formattedOffset;

if (offsetHours < 10) offSetHours = '0' + offsetHours;
if (offsetMins < 10) offsetMins = '0' + offsetMins;

if (offset < 0) {
  formattedOffset = '+' + offsetHours + ':' + offsetMins;
} else if (offset > 0) {
  formattedOffset = '-' + offsetHours + ':' + offsetMins;
} else if (offset === 0) {
 formattedOffset = 'Z';
}

That should get you pretty close.