Classes are not concatenated with those in the splattributes on contextual components

[cibernox]

I'm not sure if this is a bug in this addon or in ember itself.

It can be reproduced in this repo: https://github.com/cibernox/sparkles-ember-basic-dropdown

The gist of it:

<BasicDropdown as |dd|>
  <dd.trigger class="custom-class" title="foo">Content</dd.trigger>
</BasicDropdown>

{{!-- basic-dropdown.hbs --}}
{{yield (hash trigger=(component "basic-dropdown-trigger"))}}

{{!-- basic-dropdown-trigger.hbs --}}
<button class="default-class" ...attributes>

The rendered html is:

<button class="default-class" title="foo">

Seems that the splattibutes are applied (the title="foo" is added to the button) but attributes present in the element receiving the splattibutes are not merged.

This however works ok in non-contextual components, like the root <BasicDropdown> for instance.

[rwjblue]

Ya, almost certainly a bug in Ember itself. Would you mind PR’ing a failing test to Ember? I think you can take this test and make it like this yielded setup. I expect it will fail in the same way...

[cibernox]

This is working with the latest ember release (3.4)