Question

I have an issue when rendering templated items within a ul with some pre-defined li elements, that i’d like the templating engine to respect:

This is what I’m trying to achieve:

<ul data-bind="{template: {name: itemTemplate, foreach: itemsToRender}}">
    <li class="first">some pre-info</li>
     //this is where I'd like knockout to render my templates
    <li class="last">som-post info</li>
</ul>

This is what I actually get:

<ul data-bind="{template: {name: itemTemplate, foreach: itemsToRender}}">
    //this is where all my templateItems get rendered
    <li class="first">some pre-info</li>
    <li class="last">som-post info</li>
</ul>

An obvious alternative is to use a template that rendered the entire ul, and looped over the child items, but this would render the entire template every time there was a change, and not just the updated items (li), which is the preferred way.

Answer 1

The best option is to use the containerless control-flow bindings available in KO 1.3 (in RC).

It would look like:

<ul>
  <li class="first">some pre-info</li>
  <!-- ko foreach: itemsToRender -->
    <li class="item" data-bind="text: name"></li> 
   <!-- /ko -->
  <li class="last">some post-info</li>
</ul>

or

<ul>
  <li class="first">some pre-info</li>
  <!-- ko template: { name: 'itemTemplate', foreach: itemsToRender } -->
  <!-- /ko -->
  <li class="last">some post-info</li>
</ul>

<script id="itemTemplate" type="text/html">
    <li class="item" data-bind="text: name"></li> 
</script>

Sample: http://jsfiddle.net/rniemeyer/tzJU3/