Moment.js show diff between 2 dates

Question

I use moment(d, "YYYYMMDD").fromNow(); to get diff between date now and some date, but I would like to get without string "a few days ago".

Instead, I would like to get "7d" (7m, 1s, etc).

How can I do this?

Answer 1

If you want just to get the difference between two dates instead of a relative string just use the diff function.

var date  = moment("20170101", "YYYYMMDD"); var date7 = moment("20170108", "YYYYMMDD"); var mins7 = moment("20170101 00:07", "YYYYMMDD HH:mm"); var secs1 = moment("20170101 00:00:01", "YYYYMMDD HH:mm:ss");  console.log(date7.diff(date, "days")    + "d"); // "7d" console.log(mins7.diff(date, "minutes") + "m"); // "7m" console.log(secs1.diff(date, "seconds") + "s"); // "1s" 

Answer 2

Moment.diff does exactly that.

var a = moment([2007, 0, 29]); var b = moment([2007, 0, 28]); a.diff(b) // 86400000 

You can specify a unit:

var a = moment([2007, 0, 29]); var b = moment([2007, 0, 28]); a.diff(b, 'days') // 1