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jQuery: Appending content REMOVES previously appended content

Posted on 2011-09-04
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Last Modified: 2012-05-12
There is a bug with my code.  If you add an item and then make a selection, content is appended.  The problem is that if you add another item and make another selection, the content which was previously appended is removed.  No content should be removed, even when additional content is added.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    
    <head>
        <title>
            Demo
        </title>
        <style type="text/css">
        div.item {
        background:#eee;
        display:block;
        margin:10px;
        padding:10px 10px 5px;
        }
        </style>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
    </head>
    <body>
        <h1>If you add an item and select an option, content added by previous selections should NOT be removed.</h1>
        <div id="items">
            <div class="item" id="first">
                <p>
                    <label for="serviceItem1">
                        Item:
                    </label>
                    <select id="serviceItem1" name="serviceItem1" class="selectService">
                        <option value="">
                            --- Please Select ---
                        </option>
                        <option value="a">
                            a
                        </option>
                        <option value="b">
                            b
                        </option>
                        <option value="c">
                            c
                        </option>
                    </select>
                </p>
            </div>
        </div>
        <p>
            <input id="addItem" type="button" value="Add Item" />
        </p>
        <div id="itemCage">
            <!-- <div class="a serviceStuff">
            <p>a</p>
            </div>
            -->
            <!-- <div class="b serviceStuff">
            <address>b</address>
            </div>
            -->
            <!-- <div class="c serviceStuff">
            <p>Item C</p>
            </div>
            -->
        </div>
        <script type="text/javascript">
        /* <![CDATA[ */
            $(document).ready(function() {

                $('input').attr('checked', false);
                $('select.selectService').val('');

                selectService();

                var ci = 1;
                var u = $('#first').html();

                $('#addItem').click(function() {
                    ci++;
                    var cii = 1;
                    while ($('#items').html().indexOf('Item' + cii) !== -1 && cii < 9999) cii++;
                    $('#items').append('<div class="item" id="added' + ci + '">' + u.replace(/Item1/g, "Item" + cii) + '</div>');
                    $('#added' + ci).hide();
                    $('#added' + ci + ' span').hide()
                    $('#added' + ci).slideDown(400, function() {
                        $(this).css('height', 'auto')
                    });
                    selectService();
                    if ($('div.item').size() > 4) {
                        $('#addItem').css('display', 'none');
                        $('.later').css('color', '#fa0000')
                    }
                });
            });

            function selectService() {
                $('select.selectService').unbind('change');
                $('select.selectService').change(function() {
                    $('.serviceStuff').remove();
                    showComments(this, $(this).val());
                });
            }

            function showComments(t, _class) {
                var r = new RegExp('<([^\\s]+)[^>]*class="' + _class + '([\\S\\s]*?)</\\1>', 'g');
                var uncommented = $("#itemCage").html().match(r);
                if (uncommented) {
                    var ci = String($(t).parent().find('label').first().attr('for').substr(11));
                    $(t).parent().append(String(uncommented[0].replace('Item1', 'Item' + ci)));
                }
            }
        /* ]]> */
        </script>
    </body>
</html>

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Question by:hankknight
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2 Comments
 
LVL 8

Accepted Solution

by:
crysallus earned 2000 total points
ID: 36481807
I simply commented out the

$('.serviceStuff').remove();

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line in selectService and it seemed to behave correctly. Is there a reason that line was in there?
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LVL 16

Author Comment

by:hankknight
ID: 36481812
Hmm, that was a relic from before the code was modified.  You are right, it should be removed.  Thanks.
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