compare datetime in moment js code example

Example 1: moment check valid date

var date = moment("2016-10-19");
var check = date.isValid();
console.log(check);

Example 2: compare two dates using moment

moment('2010-10-20').isAfter('2010-01-01', 'year'); // false
moment('2010-10-20').isAfter('2009-12-31', 'year'); // true