time difference in days js

/* difference between date1 and date2 in days (date2 - date1) */ /* date1 and date 2 are already javascript date objects */ function dateDifference(date2, date1) { const _MS_PER_DAY = 1000 * 60 * 60 * 24; // Discard the time and time-zone information. const utc1 = Date.UTC(date1.getFullYear(), date1.getMonth(), date1.getDate()); const utc2 = Date.UTC(date2.getFullYear(), date2.getMonth(), date2.getDate()); return Math.floor((utc2 - utc1) / _MS_PER_DAY); }

js calculate date difference

var DateDiff = {

    inDays: function(d1, d2) {
        var t2 = d2.getTime();
        var t1 = d1.getTime();

        return parseInt((t2-t1)/(24*3600*1000));
    },

    inWeeks: function(d1, d2) {
        var t2 = d2.getTime();
        var t1 = d1.getTime();

        return parseInt((t2-t1)/(24*3600*1000*7));
    },

    inMonths: function(d1, d2) {
        var d1Y = d1.getFullYear();
        var d2Y = d2.getFullYear();
        var d1M = d1.getMonth();
        var d2M = d2.getMonth();

        return (d2M+12*d2Y)-(d1M+12*d1Y);
    },

    inYears: function(d1, d2) {
        return d2.getFullYear()-d1.getFullYear();
    }
}

var dString = "May, 20, 1984";

var d1 = new Date(dString);
var d2 = new Date();

document.write("<br />Number of <b>days</b> since "+dString+": "+DateDiff.inDays(d1, d2));
document.write("<br />Number of <b>weeks</b> since "+dString+": "+DateDiff.inWeeks(d1, d2));
document.write("<br />Number of <b>months</b> since "+dString+": "+DateDiff.inMonths(d1, d2));
document.write("<br />Number of <b>years</b> since "+dString+": "+DateDiff.inYears(d1, d2));

Posted by: Guest on September-04-2020

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