Question

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Count the number of checkboxes selected without reloading the page?

I have an order form that asks the User which type of pass they would like (1-3 days), and gives them the option to choose the days they want the pass for.

Currently, when they choose 3 days, my JQuery selects all 3 checkboxes for them, and deselects when they choose 1 or 2 day(s). However, what I’m trying to do is:

When they select 2 day pass, it only allows them to check a maximum of 2 boxes. When they select a 1 day pass, it only allows them to check 1 box.

I’m drawing a blank as to what needs to go in my validateDays() function – the best way to go about running this validation or whether this is actually the best route to take.

Every method I think of using requires the checkboxes to have the same Name/ID – but due to other parts of the form (omitted), they unfortunately can’t.

Any ideas / pointers?

HEAD Section JavaScript:

<script type="text/javascript">

function validateDays() {
    $('#matthewpeckham').find('input[type="checkbox"]').click(function () {
        var pass = parseInt($('input[name="other_1"]:checked').val(), 10) //1,2,3
        var days = $('#matthewpeckham').find('input[type="checkbox"]:checked').length;
        console.log(days, pass);
        if (days == pass) {
            $('#matthewpeckham').find('input[type="checkbox"]').not(':checked').prop('disabled', true);
        }
        else {
            $('#matthewpeckham').find('input[type="checkbox"]').not(':checked').prop('disabled', false);
        }
    })
    $('input[name="other_1"]').change(function () {
        $('#matthewpeckham').find('input[type="checkbox"]').prop({
            'checked': false,
            'disabled': false
        });
        if (parseInt($(this).val(), 10) == 3) $('#matthewpeckham').find('input[type="checkbox"]').prop({
            'checked': true,
            'disabled': false
        });
    });
}

</script>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" ></script>

<script type="text/javascript">
$(document).ready(function() {
    jQuery('#3daypass').click(function() {
        jQuery('#other_2 , #other_3 , #other_4').prop('checked', true);
    });
    jQuery('#2daypass , #1daypass').click(function() {
        jQuery('#other_2 , #other_3 , #other_4').prop('checked', false);
    });
});

</script>

BODY Section HTML:

<input name="other_1" type="radio" value="3daypass" id="3daypass" onClick="validateDays();">
<input name="other_1" type="radio" value="2daypass" id="2daypass" onClick="validateDays();">
<input name="other_1" type="radio" value="1daypass" id="1daypass" onClick="validateDays();">

<input name="other_2" type="checkbox" id="other_2" value="Tues 5 Feb">
<input name="other_3" type="checkbox" id="other_3" value="Wed 6 Feb">
<input name="other_4" type="checkbox" id="other_4" value="Thurs 7 Feb">

Answer 1

Here’s a jQuery solution: jsFiddle example

$('input[type="checkbox"]').click(function () {
    var pass = parseInt($('input[name="other_1"]:checked').val(), 10) //1,2,3
    var days = $('input[type="checkbox"]:checked').length;
    console.log(days, pass);
    if (days == pass) {
        $('input[type="checkbox"]').not(':checked').prop('disabled', true);
    }
})
$('input[name="other_1"]').change(function () {
    $('input[type="checkbox"]').prop({
        'checked': false,
            'disabled': false
    });
    if (parseInt($(this).val(), 10) == 3) $('input[type="checkbox"]').prop({
        'checked': true,
            'disabled': false
    });
});