Feature request - Add classes to auto-generated elements

[ghenry]

Hi all,

As per my chat in the slack channel:

Hi all, I'm trying to add an additional class to a template button slot on a dropdown -

This gets generated:
<a href="#" id="profileDropdown__BV_button_" aria-haspopup="true" aria-expanded="true" class="nav-link dropdown-toggle"><img src="blah"></a>

but I want to do this:

<a href="#" id="profileDropdown__BV_button_" aria-haspopup="true" aria-expanded="true" class="nav-link nav-link-profile dropdown-toggle"><img src="></a>

ie add nav-link-profile to that a href

I think a mixin or a way to get at these all these automatic class elements would be perfect. Video attached:

class_toggle.zip

[ghenry]

Hi all,

I'm done my best to put this in the right place, add docs and a test for it.
I feel this should be more generic though as there should be a prop to do this on every auto-generated child element etc. I've done what I need, now onto #1553

Thoughts?

Thanks,
Gavin.