title: "Block API Reference" post_status: publish comment_status: open taxonomy: category: - gutenberg-docs post_tag: - Block Api - Reference Guides - Repos

Block API Reference

Blocks are the fundamental element of the editor. They are the primary way in which plugins and themes can register their own functionality and extend the capabilities of the editor.

The following sections will walk you through the existing block APIs:

• Annotations
• API Versions
• Attributes
• Bindings
• Context
• Deprecation
• Edit and Save
• Metadata in block.json
• Patterns
• Registration
• Selectors
• Styles
• Supports
• Transformations
• Templates
• Variations