Experimental Block Areas Plugin Allows for Editing Content Sitewide with Gutenberg

WordPress core committer Felix Arntz is working on an experimental Block Areas plugin that would enable users to create and edit content sitewide using the Gutenberg editor. Inspired by a conversation with Morten Rand-Hendriksen at WordCamp Europe, Arntz created the plugin to “explore what the theming of tomorrow could look like already today.”
Block Areas allows users to define specific areas where they want to use the block editor (outside of regular posts). The block areas function similar to widget areas, but are created using a custom post type with a familiar admin UI.

“They are implemented as a post type – with the key aspect that they can’t be accessed in the frontend via a certain URL, but your theme has to render them via a block_areas()-render( $slug ) method that the plugin exposes,” Arntz said. “The slug you pass to the method should match the block area slug (i.e. post slug) of one of the areas you have created in the admin.”
The plugin comes with block areas for site header and footer to provide a starting point. However, adding the block areas to a theme is one technical hurdle that currently limits this experimental plugin to developers.  » Read More