js get difference between two dates

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const date1 = new Date('Mon Jan 24 2022');
const date2 = new Date('Tue Jan 25 2022');

// difference in milliseconds:
const milliseconds = Math.abs(date2 - date1);

// difference in days:
const days = Math.ceil(milliseconds / (1000 * 60 * 60 * 24));

// display results:
console.log(milliseconds + ' milliseconds');
console.log(days + ' day(s)');

// Output:
//  86400000 milliseconds
//  1 day(s)

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const getDifference = (date1, date2) => {

  // difference in milliseconds:
  const milliseconds = Math.abs(date2 - date1);

  // difference in days:
  const days = Math.ceil(milliseconds / (1000 * 60 * 60 * 24));

  // display results:
  console.log(milliseconds + ' milliseconds');
  console.log(days + ' day(s)');
}


// Usage example:

const date1 = new Date('Mon Jan 24 2022');
const date2 = new Date('Tue Jan 25 2022');

getDifference(date1, date2);

// Output:
//  86400000 milliseconds
//  1 day(s)

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const today = new Date(); // Today is 2022-04-02

const futureDate = new Date('2022-04-16');

// difference in ms, minutes, hours, days
const milliseconds = futureDate - today;
const days = Math.floor(milliseconds / 86400000); // days
const hours = Math.floor((milliseconds % 86400000) / 3600000); // hours
const minutes = Math.round(((milliseconds % 86400000) % 3600000) / 60000); // minutes

console.log(
  days + ' days, ' + hours + ' hours and ' + minutes + ' minutes to date.'
);

// Example output:
// 70 days, 6 hours and 20 minutes to date.