How to calculate the number of days between two dates? [duplicate]

Question

1. I am calculating the number of days between the 'from' and 'to' date. For example, if the from date is 13/04/2010 and the to date is 15/04/2010 the result should be

2. How do I get the result using JavaScript?

Answer 1

const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds const firstDate = new Date(2008, 1, 12); const secondDate = new Date(2008, 1, 22);  const diffDays = Math.round(Math.abs((firstDate - secondDate) / oneDay));