如何在Node JS中将大数转换为普通数？

Question

I receive my data in which there is:

deviceTimestamp:1531564520188828

I want to convert this timestamp in human date and use this code:

moment.unix(timestamp).format('dddd, MMMM Do, YYYY h:mm:ss A');

But when I console.log(deviceTimestamp), it returns me this

BigNumber { s: 1, e: 15, c: [ 15, 31656237268093 ] },

And timestamp convert does not work.

Answer 1

IMHO, you are trying to do something like this:

 deviceTimestamp = 1531564520188828; var d = new Date(deviceTimestamp); console.log(d); console.log(d.getDate() + '/' + (d.getMonth()+1) + '/' + d.getFullYear()); var dateString = d.toGMTString(); console.log(dateString); 

NOTE :

• It seems like an incorrect timestamp hence, the invalid year.
• This is an approach using Vanilla JS.

Answer 2

The number you have appears to be micro seconds since midnight 1st January 1970.

Forget the Unix timestamp and divide the number you have by 1,000 for the JavaScript timestamp.

 var deviceTimestamp = 1531564520188828; var date = moment(deviceTimestamp/1000).format('dddd, MMMM Do, YYYY h:mm:ss A'); console.log(date); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.19.1/moment.min.js"></script> 

Answer 3

Moment.js is very interesting to play .

let deviceTimestamp = 1531564520188828
var date = moment(deviceTimestamp/1000).format('dddd, MMMM Do, YYYY h:mm:ss A');

If you are looking to learn in detail about Moment.js , open https://momentjs.com/ : right click then click on inspect and try all type of possibilities in console.

Answer 4

function removeLast6(str) {
   str = str.toString();
   str = str.slice(0, -6);
   str = parseInt(str);
   return str;
}

function convertToHumanDate(timestamp) {
   return moment.unix(timestamp).format('dddd, MMMM Do, YYYY h:mm:ss A');
}

const timestampNumber = await removeLast6(1531564520188828);

const date = await convertToHumanDate(timestampNumber);