Attention WordPress themers — there is a call for testing
theme.json for Full Site Editing. 🧪
theme.json file contains settings to enable or disable theme features and set default styles for a website and its blocks. It’s all done in a consolidated and canonical way.
Anne McCarthy describes
theme.json as “a big part of what makes block themes so powerful as it allows for finer-grained control and introduces the first step in managing styles for future WordPress releases.”