Question

I have a table that has rows like:

<tr>
    <td><input type="checkbox" /></td>
    <td><a href="#">School</a></td>
    <td><a href="#">DD1 1AB</a></td>
    <td>80.10</td>
    <td>200</td>
    <td><span class="active">Active</span></td>
    <td><a href="#">John Doe</a><br/>00000 000000</td>
</tr>

What I want to do is when a user has selected the checkbox is change the the class of the parent <tr> to say selected so the user knows which row they have selected. NOTE: They can toggle these on and off!

Answer 1

Assuming some of the checkboxed may come pre-checked, I’d take this approach:

// First add class for pre-checked entries
$(".xyz input[type=checkbox]:checked").each(function() {
    $(this).closest("tr").addClass("selected");
});

// Then toggle class whenever checkbox state changes
$(".xyz input[type=checkbox]").live("change", function() {
    $(this).closest("tr").toggleClass("selected");
});

Live demo: http://jsfiddle.net/cUxmG/

To reduce overheads of searching the DOM twice, that can be combined into:

$(".xyz input[type=checkbox]").live("change", function() {
    $(this).closest("tr").toggleClass("selected");
}).filter(":checked").each(function() {
    $(this).closest("tr").addClass("selected");
});

It does the same thing: http://jsfiddle.net/cUxmG/2/