title: Why does the directive ng-href need {{}} while other directives don't?
body: <p>I am just wondering why I need to add double curly braces for ng-href while some of the other directives don't need them?</p>
  
  <pre><code>&lt;a ng-href="{{myScopeVar}}" ng-if="myScopeVar"&gt;link&lt;/a&gt;
  </code></pre>
  
  <p>Notice that <code>ng-href</code> needs braces while <code>ng-if</code> doesn't.</p>