Question

I am trying to change the class of one or more elements within a template when a button is clicked. The samples I have ssen all usually find one item with .tmplItem, and I can’t quite figure out how to achieve what I’m trying to do. This is more or less a proof of concept.

i have a structure like below.

var messages = [
{ Body: "Testing 1", Read: "0" },
{ Body: "Testing 2", Read: "1" },
{ Body: "Testing 3", Read: "0" },
{ Body: "Testing 4", Read: "1" }
];

my template is:

    <script id="messageTemplate" type="text/html">
        {{if Read == "1"}}
        <tr class="hdnMessage">
            <td class="hdnMessage" >
<input type="checkbox" id="cbHasReadMessage" checked="checked">
</td>
        {{else}}
        <tr class="showMessage">
            <td><input type="checkbox" id="cbHasReadMessage"></td>
        {{/if}}        
        <td>${Body}</td>
        </tr>
</script>

css is:

<style type="text/css">
.hdnMessage 
{
    display:none;
}
.showMessage
{
    display:block;
}
</style>

I have a button outside of the template

<input type="button" value="Show Read Messages" id="btnShowHideReadMessages" />

which I added a click event for:

$("#btnShowHideReadMessages").click(function() {    
if (showingReadMessages) {
      showingReadMessages = false;
      $(this).val("Show Read Messages");
//try to find checked checkboxes and set the class of the tr which is its parent
}    
else {
      showingReadMessages = true;
      ///Try finding all the current hidden TRs
      var hdnMessages = $("tr.hdnMessage").tmplItem();
      var hdnMsg = hdnMessages.data;
      var hdnElement = hdnMessages.nodes;
      $(hdnElement).replaceWith($('.showMessage'));
      }    
});

The last script segment is incomplete as I couldnt figure out how to get this to work. Any help would be appreciated.

Answer 1

Remove class="showMessage" from the template altogether then change the bottom section of code to something like this:

$("#btnShowHideReadMessages").click(function() {  
     $("tr.hdnMessage").toggleClass('hdnMessage');
});