How to shorten this JQuery Code

Question

I'm new to javascript/jQuery. Is there a way to make this code shorter?

else if (players == 6) {
    $('#box1').addClass("col-md-4");
    $('#box1').removeClass("col-md-6");
    $('#box2').addClass("col-md-4");
    $('#box2').removeClass("col-md-6");
    $('#box3').addClass("col-md-4");
    $('#box3').removeClass("col-md-6");
    $('#box4').addClass("col-md-4");
    $('#box4').removeClass("col-md-6");
    $('#box4').removeClass("col-md-offset-4");
    $('#box5').addClass("col-md-4");
    $('#box5').removeClass("col-md-6");
    $('#box6').addClass("col-md-4");
    $('#box6').removeClass("col-md-6");
    $('#box1').show();
    $('#box2').show();
    $('#box3').show();
    $('#box4').show();
    $('#box5').show();
    $('#box6').show();
}

Answer 1

You can combine the selectors and apply each method with chaining.

else if (players == 6) {
   $('#box1,#box2,#box3,#box4,#box5,#box6')
        .addClass("col-md-4")
        .removeClass("col-md-6")
        .show();
}

---

Or use attribute starts with the selector.

else if (players == 6) {
   $('[id^="box"]')
        .addClass("col-md-4")
        .removeClass("col-md-6")
        .show();
}

---

Or use a common class for elements and select based on that.

else if (players == 6) {
   $('.box')
        .addClass("col-md-4")
        .removeClass("col-md-6")
        .show();
}