How to get the difference (in days) between two dates?
js
const getDaysDiffBetweenDates = (dateInitial, dateFinal) =>
(dateFinal - dateInitial) / (1000 * 3600 * 24);
// Example
getDaysDiffBetweenDates(new Date("2017-12-13"), new Date("2017-12-22")); // 9