title: How to make Font Awesome icon clickable to open a modal in bootstrap 3
body: <pre><code>&lt;i class="fas fa-plus fa-2x"&gt;&lt;/i&gt;
  </code></pre>
  
  <p>this is the sample icon that i want to click to open a modal.
  required:
  1.bootstrap 3 (since the previous Template Design using bootstrap 3) </p>