how to create Summernote Custom Button with dropdown list in version v0.8.1 and add attributes to button
<p>I am trying to create a custom button(with a drop down list) in summer-note v0.8.1. </p>

<p>I was previously using an older version which worked well, however in the new version I cannot figure out how to create a dropdownlist button.</p>

<p>Please help me out in adding attributes to the custom button.</p>