How can I define a custom button in vue-froala-wysiwyg? about vue-froala-wysiwyg HOT 4 CLOSED

import FroalaEditor from 'froala-editor';

export default {
    methods:{
        myFunction(){
            alert('Custom button');
        }
    },
    mounted() {
        FroalaEditor.DefineIcon('alert', {NAME: 'info', SVG_KEY: 'help'});
        FroalaEditor.RegisterCommand('alert', {
          title: 'Hello',
          focus: false,
          undo: false,
          refreshAfterCallback: false,
          callback: () => {
            this.myFunction();
          }
        });
     }
}