Custom toolbar split button

This example shows you how to add a simple “split” menu button to TinyMCE’s toolbar.

TinyMCE HTML JS Edit on CodePen

<textarea id="custom-toolbar-split-button">
  <p style="text-align: center; font-size: 15px;"><img title="TinyMCE Logo" src="//www.tiny.cloud/images/glyph-tinymce@2x.png" alt="TinyMCE Logo" width="110" height="97" /></p>
  <h2 style="text-align: center;">Welcome to the TinyMCE editor demo!</h2>
  <p>Select a menu item from the listbox above and it will insert contents into the editor at the caret position.</p>

  <h2>Got questions or need help?</h2>
  <ul>
    <li>Our <a href="https://www.tiny.cloud/docs/">documentation</a> is a great resource for learning how to configure TinyMCE.</li>
    <li>Have a specific question? Visit the <a href="https://community.tinymce.com/forum/">Community Forum</a>.</li>
    <li>We also offer enterprise grade support as part of <a href="https://www.tiny.cloud/pricing">TinyMCE Enterprise</a>.</li>
  </ul>

  <h2>Found a bug?</h2>
  <p>If you think you have found a bug please create an issue on the <a href="https://github.com/tinymce/tinymce/issues">GitHub repo</a> to report it to the developers.</p>

  <h2>Finally ...</h2>
  <p>Don't forget to check out our other product <a href="http://www.plupload.com" target="_blank">Plupload</a>, your ultimate upload solution featuring HTML5 upload support.</p>
  <p>Thanks for supporting TinyMCE! We hope it helps you and your users create great content.
    <br>All the best from the TinyMCE team.</p>
</textarea>

tinymce.init({
  selector: 'textarea#custom-toolbar-split-button',
  toolbar: 'myButton',
  menubar: false,
  setup: function (editor) {
    editor.ui.registry.addSplitButton('myButton', {
      text: 'My Button',
      onAction: function () {
        editor.insertContent('<p>You clicked the main button</p>');
      },
      onItemAction: function (api, value) {
        editor.insertContent(value);
      },
      fetch: function (callback) {
        var items = [
          {
            type: 'choiceitem',
            text: 'Menu item 1',
            value: ' <em>You clicked menu item 1!</em>'
          },
          {
            type: 'choiceitem',
            text: 'Menu item 2',
            value: ' <em>You clicked menu item 2!</em>'
          }
        ];
        callback(items);
      }
    });
  }
});