Javascript function to get the difference in Days between two dates.

differenceInDays.ts

/**
* Function to get the difference in Days between two dates
* @param {string} date1 - With the date 1 (With at least yyyy-mm-dd date format)
* @param {number} date2 - With the date 2 (With at least yyyy-mm-dd date format)
* @returns {number} With the difference in days
*/
export const differenceInDays = (date1: string, date2: string): number => {
 const d1 = new Date(date1);
 const d2 = new Date(date2);
 const timeDiff = d2.getTime() - d1.getTime();
 const dayDiff = timeDiff / (1000 * 3600 * 24);
 return Math.ceil(dayDiff);
};