Custom Attributes

We are using Sitely to interact with Node-Red with UIBuilder and I’ve been having to manually edit the HTML after publishing to disk in order to add the data-type attribute. This can be quite tedious. Is there a feature of Sitely that will allow me to add an attribute to the A tag or any HTML tag?

<div class="v3 ps43 s39 c11 z37" id="interphonebtn">
    <a onclick="fn2()" style="cursor: pointer" href="javascript:void(0)" id="interphone" class="a2 f7" data-type="interphone">Interphone</a>
</div>

If not, can I add a feature request for custom attributes?

No there is no option for that. You will need to add the whole button in an embed element.