compare two dates by day in javascript

Question

I'm trying to compare two dates by day in javascript. Comparing dates is fine, but I want just compare them by day and ignore the time of day. Is this possible without relying on a library like momentjs?

You can easily get the date and month etc. from a `Date` object. Where is your attempt at solving this on your own? — , Nov 23 '18 at 12:51
possible duplicate:https://stackoverflow.com/questions/492994/compare-two-dates-with-javascript — Prashant Pimpale, Nov 23 '18 at 12:52
It's not a duplicate because I want to compare days only, not the full date. — abyrne85, Nov 23 '18 at 12:55
You can always set time to noon (or anything, just the same thing for all dates), and compare the results. — tevemadar, Nov 23 '18 at 12:57

score 2 · Accepted Answer · 2018-11-23T13:02:26.340

Here is a snippet that compares dates without time:

   var today = new Date();
    today.setHours(0, 0, 0, 0);
    d = new Date(my_value); 
    d.setHours(0, 0, 0, 0);

    if(d >= today){ 
        alert(d is greater than or equal to current date);
    }

And here is a function that will give you the exact difference between two days:

function daysBetween(first, second) {

    // Copy date parts of the timestamps, discarding the time parts.
    var one = new Date(first.getFullYear(), first.getMonth(), first.getDate());
    var two = new Date(second.getFullYear(), second.getMonth(), second.getDate());

    // Do the math.
    var millisecondsPerDay = 1000 * 60 * 60 * 24;
    var millisBetween = two.getTime() - one.getTime();
    var days = millisBetween / millisecondsPerDay;

    // Round down.
    return Math.floor(days);
}

compare two dates by day in javascript

1 Answers1