// date 'start' 04-05-2019 13:33:03
// date 'end' 04-05-2019 13:36:30
let start_date = new Date(start)
let end_date = new Date(end)
let diff = Math.abs(end_date-start_date) / 1000
let days = Math.floor(diff / 86400);
let hours = Math.floor(diff / 3600) % 24
let minutes = Math.floor(diff / 60) % 60
let seconds = diff % 60