Get the date with the minimum age using the Moment.js library

getMinAgeDateWithMomentJs.js

const dates = ["2018-07-01", "2018-02-01", "2017-01-01", "2015-07-19", "2010-07-19"];

getMinAgeDateWithMomentJs(dates); // return "2018-07-01"

function getMinAgeDateWithMomentJs(dates = []) {

  if( !dates.length || typeof moment === 'undefined' ) {
    console.log( 'getMinAgeDate(), invalid argument or moment.js is undefined' );
    return false;
  }

  let result = dates.shift();

  for( let i = 0; i < dates.length; i++ ) {

    if( moment(result).isBefore(moment(dates[i]), 'day') ) { // or 'year', 'mohth' etc.
      result = dates[i];
    }

  }

  return result;

}