JSFiddle - React, Tailwind, and code Playground

by superbDeveloper

JavaScript

var startDate = "2012-05-02";
var endDate = "2012-05-06";


var startDateSplit = startDate.split('-');
var dDate1= new Date(startDateSplit[0], startDateSplit[1]-1, startDateSplit[2]);

var endDateSplit = endDate.split('-');
var dDate2 = new Date(endDateSplit[0], endDateSplit[1]-1, endDateSplit[2]);
    

        var iWeeks, iDateDiff, iAdjust = 0;
        if (dDate2 < dDate1) return -1; // error code if dates transposed
        var iWeekday1 = dDate1.getDay(); // day of week
        var iWeekday2 = dDate2.getDay();
        iWeekday1 = (iWeekday1 == 0) ? 7 : iWeekday1; // change Sunday from 0 to 7
        iWeekday2 = (iWeekday2 == 0) ? 7 : iWeekday2;
        if ((iWeekday1 > 5) && (iWeekday2 > 5)) iAdjust = 1; // adjustment if both days on weekend
        iWeekday1 = (iWeekday1 > 5) ? 5 : iWeekday1; // only count weekdays
        iWeekday2 = (iWeekday2 > 5) ? 5 : iWeekday2;
           
        // calculate differnece in weeks (1000mS * 60sec * 60min * 24hrs * 7 days = 604800000)
        iWeeks = Math.floor((dDate2.getTime() - dDate1.getTime()) / 604800000)
           
        if (iWeekday1 <= iWeekday2) {
          iDateDiff = (iWeeks * 5) + (iWeekday2 - iWeekday1)
        } else {
          iDateDiff = ((iWeeks + 1) * 5) - (iWeekday1 - iWeekday2)
        }
           
        iDateDiff -= iAdjust // take into account both days on weekend
    
        alert((iDateDiff + 1)); // add 1 because dates are inclusive
        //(iDateDiff + 1);