title: adding effect to knockout "if" binding
body: <p>I've found examples in the knockout.js documentation on how to add a jquery effect when toggling the visible binding or even using the beforeRemove event of the 'foreach' binding.</p>
  
  <p>However, I have not found out how to add a jquery effect when toggling the "if" binding</p>
  
  <p>Consider the following code:</p>
  
  <pre><code>&lt;table data-bind="with: myModel"&gt;
   &lt;tr data-bind="if: IsVisible"&gt;
  &lt;td&gt;some string&lt;/td&gt;
   &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>How would I add a jquery fadeIn effect when IsVisible returns true ? </p>