title: How to start filtering only when the length of querytext is equal to 2
body: <p>How can I be able to start filtering only when the querytext's length is equal to 2?</p>
  
  <p>I have this code and I do not know how to start filtering only when querytext.length >=2</p>
  
  <pre><code>&lt;input type="search" ng-model="querytext"&gt;
  &lt;ul&gt;
      &lt;li ng-repeat="value in filteredList | filter:querytext&gt;{{value.Name}}&lt;/li&gt;
  &lt;/ul&gt;
  $scope.filteredList =[{Id:1,Name:"Soul"},{Id:2,Name:"Croft"}];
  </code></pre>