via wptavern.com => original post link
Gutenberg 15.6 is now available with a new Details block tucked under the Experiments menu. Once enabled, it can be used to toggle the visibility of hidden content. This can be useful for presenting things like text transcripts for video blocks or simple spoiler alerts. By default the toggle is open in the block editor but closed on the front end. This is the first iteration, so the behavior of the toggle is still somewhat rough.
Another interesting experiment that shipped in version 15.6 is a command center for the Site Editor. It was created to be a quick search for jumping to other pages or templates in the editor.
“This can be seen as a start on an extensible command and quick search component that can be used for way-finding (go to About page; edit Archive template) and running commands (toggle top toolbar; etc),” Gutenberg lead architect Matias Ventura said in the ticket outlining the feature. “The first milestone is to power quick search for content and templates within the site editor.”