title: How can I check if the input field is not empty
body: <p>I need to check that my input field is not empty.</p>
  
  <p>I tried the following but it's not working.</p>
  
  <p>JavaScript:</p>
  
  <pre><code>if ($scope.currentUser.Login.length != 0) {
      console.log($scope.currentUser.login.length);
  }
  </code></pre>
  
  <p>HTML:</p>
  
  <pre><code>&lt;div class="cClearFloat cInputSpace"&gt;
      &lt;input placeholder="login" ng-model="currentUser.login"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Can someone help me?</p>