momentjs diff days code example
Example 1: momentjs number of days between two dates
var given = moment("2018-03-10", "YYYY-MM-DD");
var current = moment().startOf('day');
//Difference in number of days
moment.duration(given.diff(current)).asDays();
Example 2: moment date difference in days
moment(new Date()).diff(moment(new Date()), 'days') // 0
Example 3: moment diff
var a = moment([2007, 0, 29]);
var b = moment([2007, 0, 28]);
a.diff(b, 'days') // 1