title: Hide Value in input when it's zero in angular Js
body: <p>I have an angular object item.add_value = 0 bind into the </p>
  
  <pre><code>&lt;input type="number" ng-model="item.add_value"   ng-change="sumUp(item)" min="0" max="10000000000" /&gt;
  </code></pre>
  
  <p>In order to do the calculation I have to use type="number" not type="text"</p>
  
  <p>Then my question is how to hide the content of the input when the value is 0?</p>