javascript - The problem of converting JS string to timestamp with a difference of 8 hours

Question

var time = new Date('2014-07-03'); //Thu Jul 03 2014 08:00:00 GMT 0800 (China Standard Time)
Date.parse(time); //1404345600000

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var time = new Date('2014-7-3'); //Thu Jul 03 2014 00:00:00 GMT 0800 (China Standard Time)
Date.parse(time); //1404316800000

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How come there are 8 more hours after completing 0?

Answer 1

According to ECMA-262 ed 3, time parsing may be handled differently.

In ES5, strings in ISO 8601 format, if no time zone is specified, are parsed into UTC, and there is no unified behavior for processing non-ISO 8601 strings.

In ES2015, strings without specified time zone are parsed to local time (according to system time).

If you want to process all strings in this form as local time, you can write a function yourself:

function parseISOLocal (s) {
  var b = s.split(/\D/);
  return new Date(b[0], b[1]-1, b[2]);
}

Answer 2

I also saw this problem some time ago.

If you change the date format to "2014/07/02", it will be converted to 0 o'clock normally.

Reference: Xuanfengge http://www.xuanfengge.com/js-...

Answer 3

It’s normal under Firefox