title: AngularJS binds unsafe:javascript:void(0) when value is javascipt:void(0)
body: <pre><code>&lt;a ng-attr-href="{{page==1 &amp;&amp; 'javascript:void(0)' || '#a/'+tid+'/'+(page-1)}}"&gt;Prev&lt;/a&gt;
  </code></pre>
  
  <p>I want to get that when page = 1</p>
  
  <pre><code>&lt;a href="javascript:void(0)"&gt;Prev&lt;/a&gt;
  </code></pre>
  
  <p>But the result:</p>
  
  <pre><code>&lt;a href="unsafe:javascript:void(0)"&gt;Prev&lt;/a&gt;
  </code></pre>