Should be able to start open

[dplassgit]

"By default, the content will be collapsed." There should be a way to "start" in the open state instead of the collapsed state.

[frankiefu]

You can set the attribute opened to make core-collapse to start open:

<core-collapse opened>
  <div class="content">
      ...
  </div>
</core-collapse>

[dplassgit]

When I do that, it "animates" from a closed to an open state upon loading. I don't want that. I want it to just "be" open.