convert iso date to milliseconds in javascript

问题

Can I convert iso date to milliseconds? for example I want to convert this iso

2012-02-10T13:19:11+0000

to milliseconds.

Because I want to compare current date from the created date. And created date is an iso date.

回答1:

Try this

var date = new Date("11/21/1987 16:00:00"); // some mock date
var milliseconds = date.getTime(); 
// This will return you the number of milliseconds
// elapsed from January 1, 1970 
// if your date is less than that date, the value will be negative

EDIT

You've provided an ISO date. It is also accepted by the constructor of the Date object

var myDate = new Date("2012-02-10T13:19:11+0000");
var result = myDate.getTime();

Edit

The best I've found is to get rid of the offset manually.

var myDate = new Date("2012-02-10T13:19:11+0000");
var offset = myDate.getTimezoneOffset() * 60 * 1000;

var withOffset = myDate.getTime();
var withoutOffset = withOffset - offset;
alert(withOffset);
alert(withoutOffset);

Seems working. As far as problems with converting ISO string into the Date object you may refer to the links provided.

EDIT

Fixed the bug with incorrect conversion to milliseconds according to Prasad19sara's comment.

回答2:

A shorthand of the previous solutions is

var myDate = +new Date("2012-02-10T13:19:11+0000");

It does an on the fly type conversion and directly outputs date in millisecond format.

Another way is also using parse method of Date util which only outputs EPOCH time in milliseconds.

var myDate = Date.parse("2012-02-10T13:19:11+0000");

回答3:

Another option as of 2017 is to use Date.parse(). MDN's documentation points out, however, that it is unreliable prior to ES5.

var date = new Date(); // today's date and time in ISO format
var myDate = Date.parse(date);

See the fiddle for more details.

回答4:

Another possible solution is to compare current date with January 1, 1970, you can get January 1, 1970 by new Date(0);

var date = new Date(); 
var myDate= date - new Date(0);

回答5:

Another solution could be to use Number object parser like this:

let result = Number(new Date("2012-02-10T13:19:11+0000"));
let resultWithGetTime = (new Date("2012-02-10T13:19:11+0000")).getTime();
console.log(result);
console.log(resultWithGetTime);

This converts to milliseconds just like getTime() on Date object

回答6:

Yes, you can do this in a single line

let ms = Date.parse('2019-05-15 07:11:10.673Z');
console.log(ms);//1557904270673

回答7:

var date = new Date()
console.log(" Date in MS last three digit = "+  date.getMilliseconds())
console.log(" MS = "+ Date.now())

Using this we can get date in milliseconds

来源：https://stackoverflow.com/questions/9229213/convert-iso-date-to-milliseconds-in-javascript

标签

javascript

iso

isodate