A registered widget with no block equivalent renders inside a legacy widget block, which keeps it working and keeps it visible as unfinished. Hiding from the picker while…
5.8 replaced the widget screen with a block editor, and six custom widgets became one HTML block each with the rendered markup pasted in. The opt-out is legitimate…
A block rendered by PHP at request time returns null from save, which means the post contains only the block comment and its attributes. Returning null is what…
Post meta is invisible to the block editor unless it is registered with a type and exposed to the REST API. show_in_rest makes it readable and writable by…
A pattern registered against a category that does not exist yet lands silently in uncategorized, which is a tab nobody opens. The priority is load-bearing and there is…
templateLock on a container is inherited by everything inside it, which locks the structure and leaves the text editable. Locking the structure and leaving the content free is…