How to Calculate the Number of Days Between two Dates in TypeScript ?

// Create Date objects representing the two dates
const date1: Date = new Date('2024-01-15');
const date2: Date = new Date('2024-02-06');

// Calculate the difference in 
// milliseconds between the two dates
const differenceInMs: number = 
    Math.abs(date2.getTime() - date1.getTime());

// Define the number of milliseconds in a day
const millisecondsInDay: number = 1000 * 60 * 60 * 24;

// Calculate the difference in days by 
// dividing the difference in milliseconds by 
// milliseconds in a day
const differenceInDays: number = 
    Math.floor(differenceInMs / millisecondsInDay);

// Output the result
console.log(
    'Number of days between the two dates:', differenceInDays);

// Import the moment.js library using 
// the import statement.
import * as moment from 'moment';

function daysBetweenDates(date1: string, date2: string): number {
    
    // Create moment object for the start date.
    const startMoment = moment(date1); 
    
    // Create moment object for the end date.
    const endMoment = moment(date2);   
    
    // using the diff() method with 'days' as 
    // the second parameter.
    // This method returns the difference between 
    // the two moments in days.
    
    const daysDifference = 
        endMoment.diff(startMoment, 'days');
    return daysDifference;
}

const startDate = '2024-01-01';
const endDate = '2024-02-08';

const daysDifference = 
    daysBetweenDates(startDate, endDate);

console.log(
    "Number of days between the two dates:", daysDifference);