Enable the default RTE with a custom function

Do my API call correctly, want to add a RTE with custom function to add a link/open new windows/open modal:

Command work for fontSize but the dropdown are not aligned and show the option value Command not work for insertHTML. Function not working (Intended/Not a Features)

http://grapesjs.com/demo.html

  editor.RichTextEditor.add('fontSize', {
    command: 'fontSize',
    options: [
      {name: 'Huge', value: '7'},
      {name: 'Normal', value: '5'},
      {value: '1'}
    ]
  });  

I think even command not working to add specific hardcoded HTML

    editor.RichTextEditor.add('insertHTML', {
    command: 'insertHTML',
    class: 'fa fa-link',
    title: 'test',
    args: '<a class="link" href="">${content}</a>',
  });  

 editor.Commands.add('tlb', {
    run:  function(editor, sender){
      editor.getSelected().view.enableEditing();
      //sethref for link etc
      alert('Hello world!');
    },
    stop:  function(editor, sender){
    },
  });
    editor.RichTextEditor.add('tlb', {
    command: 'tlb',
    class: 'fa fa-link',
    title: 'test'
 
  });