tinyMCE with ionic

I’m currently trying to use tinymce with Ionic and have come across a strange problem. Displayed below is my index.html page. If I utilise it in this way then it works perfectly and I am given a tinymce textarea box to work with.

However, if I try to call it in any of my other html files then it doesn’t change the look/functionality of the tag.

Is there a way I should be calling it from within my other files?

Thanks!

<!DOCTYPE html>
<html>

<head>
  <script src="tinymce/tinymce.min.js"></script>
  <script>
    tinymce.init({
      selector: 'textarea'
    });
  </script>

</head>

<body ng-app="myApp">

  <textarea>Easy (and free!) You should check out our premium features.</textarea>
    
  <ion-nav-view></ion-nav-view>
</body>

</html>