exclude weekends in javascript date calculation

Question

I have two sets of codes that work. Needed help combining them into one.

This code gets me the difference between two dates. works perfectly:

functio         


        

Answer 1

Here's a simple function to calculate the number of business days between two date objects. As designed, it does not count the start day, but does count the end day so if you give it a date on a Tuesday of one week and a Tuesday of the next week, it will return 5 business days. This does not account for holidays, but does work properly across daylight savings changes.

function calcBusinessDays(start, end) {
    // This makes no effort to account for holidays
    // Counts end day, does not count start day

    // make copies we can normalize without changing passed in objects    
    var start = new Date(start);
    var end = new Date(end);

    // initial total
    var totalBusinessDays = 0;

    // normalize both start and end to beginning of the day
    start.setHours(0,0,0,0);
    end.setHours(0,0,0,0);

    var current = new Date(start);
    current.setDate(current.getDate() + 1);
    var day;
    // loop through each day, checking
    while (current <= end) {
        day = current.getDay();
        if (day >= 1 && day <= 5) {
            ++totalBusinessDays;
        }
        current.setDate(current.getDate() + 1);
    }
    return totalBusinessDays;
}

And, the jQuery + jQueryUI code for a demo:

// make both input fields into date pickers
$("#startDate, #endDate").datepicker();

// process click to calculate the difference between the two days
$("#calc").click(function(e) {
    var diff = calcBusinessDays(
        $("#startDate").datepicker("getDate"), 
        $("#endDate").datepicker("getDate")
    );
    $("#diff").html(diff);
});

And, here's a simple demo built with the date picker in jQueryUI: http://jsfiddle.net/jfriend00/z1txs10d/