Composition objects can be used inside of block elements and certain message payload fields. They are simply common JSON object patterns that you'll encounter frequently when building blocks or composing messages.
Our guide to Block Kit in app surfaces shows you where you can use blocks.
The lists of fields and values below describe the JSON that apps can use to generate each object:
Composition objects can be used inside of block elements and certain message payload fields. They are simply common JSON object patterns that you'll encounter frequently when building blocks or composing messages. Our guide to Block Kit in app surfaces shows you where you can use blocks. The lists of fields and values below describe the JSON that apps can use to generate each object: