title: Angular - How to show an input based on Dropdown option
body: <p>I wish to show the input field when "Others" option is selected on dropdown, but can't figure out how to-</p>
  
  <p>Here is my code</p>
  
  <pre><code>   &lt;div class="form-group"&gt;
        &lt;label for="college"&gt;College:&lt;/label&gt;
        &lt;select class="form-control" id="college" ngModel name="college_name" required&gt;
          &lt;option&gt;Ajay Kumar Garg Engineering College&lt;/option&gt;
          &lt;option&gt;Others- Please Specify Below&lt;/option&gt;
        &lt;/select&gt;
      &lt;/div&gt;
      &lt;div class="form-group" *ngIf="showfield"&gt;
        &lt;label for="name"&gt;Enter College Name:&lt;/label&gt;
        &lt;input type="text" class="form-control" id="name" ngModel name="other_college_name" required&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p>showfield = false; is set in .ts file</p>