An Introduction to Styling Themes for Gutenberg
This is a great little post about the process of making a theme compatible with the much-discussed Gutenberg editor slated to come out in WordPress 5.0. ThemeShaper — the (maybe) official WordPress.com theming blog — goes into a lot of detail about what their theme team has done to get their themes ready for it.
They cover in good detail some of the issues they faced in trying to make good changes to the default styles, as well as the new
add_theme_support calls you’ll need to make.
If you’re wondering what effect Gutenberg will have on your theming, looking at what the team has accomplished and how is a great idea. In MasterWP, Ben recommends that you test out the Ohana theme. Saying, “It’s the most complete example and has support for editor styles, and fully customized block styles.”