title: How to build custom user mention functionality for Tiny MCE editor in Angular
body: <p>I am trying to customize the tinyMCE editor and want to add user mention functionality like this in the following image:
  <a href="https://i.stack.imgur.com/5Dccs.png" rel="nofollow noreferrer">screenshot</a></p>
  <p>tinyMCE provides this in its premium subscription. But I want to build this by own. I can easily add this functionality to a simple input using <a href="https://www.npmjs.com/package/angular-mentions" rel="nofollow noreferrer">angular-mention</a>. but this package is not working with tinyMCE editor. How can I add user mention functionality in tinyMCE editor.</p>
  <p>[Edit]
  I want that if I type '@' symbol in the tinyMCE editor. It would trigger a list of username (with matching name as typed string after @) in dropdown, and user can select one of the username. Please let me know if any more description required.</p>