How to calculate the number of days between two dates in JavaScript ?

let date1 = new Date("01/16/2024");
let date2 = new Date("01/26/2024");

// Calculating the time difference
// of two dates
let Difference_In_Time =
    date2.getTime() - date1.getTime();

// Calculating the no. of days between
// two dates
let Difference_In_Days =
    Math.round
        (Difference_In_Time / (1000 * 3600 * 24));

// To display the final no. of days (result)
console.log
    ("Total number of days between dates:\n" +
        date1.toDateString() + " and " +
        date2.toDateString() +
        " is: " + Difference_In_Days + " days");

// One day Time in ms (milliseconds)
let one_day = 1000 * 60 * 60 * 24;

// To set present_dates to two variables
let present_date = new Date();

// 0-11 is Month in JavaScript
let christmas_day = 
    new Date(present_date.getFullYear(), 11, 25);

// To Calculate next year's Christmas if passed already.
if (present_date.getMonth() == 
    11 && present_date.getDate() > 25) {
        christmas_day.setFullYear(christmas_day.getFullYear() + 1);
}

// To Calculate the result in milliseconds and 
// then converting into days
let Result = Math.round((christmas_day.getTime() - 
    present_date.getTime()) / one_day);

// To remove the decimals from the (Result) 
// resulting days value
let Final_Result = Result.toFixed(0);

// To display the final_result value
console.log("Number of days remaining till Christmas:\n" +
    present_date.toDateString() + " and " + 
    christmas_day.toDateString() +
    " is: " + Final_Result + " days");

let date1 = new Date("01/16/2024");
let date2 = new Date("01/26/2024");

// Convert dates to UTC timestamps
let utc1 = Date.UTC(date1.getFullYear(), date1.getMonth(), date1.getDate());
let utc2 = Date.UTC(date2.getFullYear(), date2.getMonth(), date2.getDate());

// Calculate the time difference in milliseconds
let timeDiff = Math.abs(utc2 - utc1);

// Convert milliseconds to days
let daysDiff = Math.ceil(timeDiff / (1000 * 60 * 60 * 24));

// Display the result
console.log(`Total number of days between dates:
${date1.toDateString()} and ${date2.toDateString()} is: ${daysDiff} days`);

let date1 = new Date("01/16/2024");
let date2 = new Date("01/26/2024");

// Use Intl.DateTimeFormat to format dates
let dateFormatter = new Intl.DateTimeFormat('en-US');

// Calculate the number of days between two dates
let Difference_In_Days = Math.floor((date2 - date1) / (1000 * 60 * 60 * 24));

// Display the formatted dates and the difference in days
console.log(`Total number of days between dates:
${dateFormatter.format(date1)} and ${dateFormatter.format(date2)} is: 
${Difference_In_Days} days`);