Created attachment 298412 [details] The words "before" and "after" should appear on either side of the "Details" heading inserted by the browser, like they do before the "Summary" provided in the other example. For <details> elements that lack a <summary>, the browser inserts one. This dynamically inserted element cannot be styled the same way as if the element is provided by the developer - specifically CSS generated content is not inserted. Possibly related to Bug 117374.
<rdar://problem/29949055>