Moment js Time Ago计算错误的日期

Question

maybe a simple question but i don't get it.

var date = new Date();
test = date.toISOString();
alert(moment(test, "YYYYMMDD").fromNow());

Will return "16 hours", but why?

Demo: https://jsfiddle.net/5jacaxbf/

Answer 1

Because you are using moment(String, String) , instead of moment(String) ( toISOString() output is obviously in ISO 8601 format) or moment(Date) .

So moment(test, "YYYYMMDD") will be the start of the day instead of the current time.

As the Default section states:

You can create a moment object specifying only some of the units, and the rest will be defaulted to the current day, month or year, or 0 for hours, minutes, seconds and milliseconds.

 var date = new Date(); test = date.toISOString(); var m1 = moment(test, "YYYYMMDD") console.log(m1.format()); console.log(m1.fromNow()); var m2 = moment(test) console.log(m2.format()); console.log(m2.fromNow()); var m3 = moment(date) console.log(m3.format()); console.log(m3.fromNow()); 

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