jquery multiple checkbox issue

Question

I'm trying to add a multiple checkbox in a table.

and this is the code.

HTML

<HTML>
<HEAD>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
    <TITLE>Multiple Checkbox Select/Deselect - DEMO</TITLE>
</HEAD>
<BODY>
    <H2>Multiple Checkbox Select/Deselect - DEMO</H2>
<table border="1">
<tr>
    <th><input type="checkbox" id="selectall"/></th>
    <th>Cell phone</th>
    <th>Rating</th>
</tr>
<tr>
    <td align="center"><input type="checkbox" class="case" name="case" value="1"/></td>
    <td>BlackBerry Bold 9650</td>
    <td>2/5</td>
</tr>
<tr>
    <td align="center"><input type="checkbox" class="case" name="case" value="2"/></td>
    <td>Samsung Galaxy</td>
    <td>3.5/5</td>
</tr>
<tr>
    <td align="center"><input type="checkbox" class="case" name="case" value="3"/></td>
    <td>Droid X</td>
    <td>4.5/5</td>
</tr>
<tr>
    <td align="center"><input type="checkbox" class="case" name="case" value="4"/></td>
    <td>HTC Desire</td>
    <td>3/5</td>
</tr>
<tr>
    <td align="center"><input type="checkbox" class="case" name="case" value="5"/></td>
    <td>Apple iPhone 4</td>
    <td>5/5</td>
</tr>
</table>

</BODY>
</HTML>

jQuery

<SCRIPT language="javascript">
$(function(){

    // add multiple select / deselect functionality
    $("#selectall").click(function () {
          $('.case').attr('checked', this.checked);
    });

    // if all checkbox are selected, check the selectall checkbox
    // and viceversa
    $(".case").click(function(){

        if($(".case").length == $(".case:checked").length) {
            $("#selectall").attr("checked", "checked");
        } else {
            $("#selectall").removeAttr("checked");
        }

    });
});
</SCRIPT>

OK this works fine, but the problem is, what i'm going to do is not a static table.

it request and response and appends the table dynamically.

and if the rows are added like this. it doesn't handle the event.

Any good idea?

Arun P Johny · Accepted Answer · 2013-11-29 09:28:25Z

3

You need to use event delegation

 // add multiple select / deselect functionality
 $("#selectall").click(function () {
     $('.case').prop('checked', this.checked);
 });

 // if all checkbox are selected, check the selectall checkbox
 // and viceversa
 $(document).on('click', ".case", function () {
     $("#selectall").prop("checked", $(".case:not(:checked)").length == 0);
 });

Demo: Fiddle

Also use .prop() to set the checked state

answered Nov 29, 2013 at 9:28

Arun P Johny

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3 Comments

Canna Over a year ago

yes i checked. if it is a static table. this code works. But in my situation this doesnt work

Arun P Johny Over a year ago

then there is some other issue

Canna Over a year ago

Thanks for the fast response. I got the bug :)

Andrew · Accepted Answer · 2013-11-29 09:29:18Z

0

Jquery support event delegation, just like this:

$(document.body).on('click', '.case', function(){

});

answered Nov 29, 2013 at 9:29

Andrew

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Comments

Karolis Gudiškis · Accepted Answer · 2013-11-29 09:29:46Z

0

Use .on() function. Examples can founded in http://api.jquery.com/on/

answered Nov 29, 2013 at 9:29

Karolis Gudiškis

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