Schemas
These guides discuss how to set up a ValuesSchema or TablesSchema on a Store so that certain structures of data are assured.
See also the Countries demo, the Todo App demos, and the Drawing demo.
Using Schemas
Schemas are a simple declarative way to say what data you would like to store.
Schema-Based Typing
You can use type definitions that infer API types from the schemas you apply, providing a powerful way to improve your developer experience when you know the shape of the data being stored.
Mutating Data With Listeners
Although listeners are normally prevented from updating data, there are times when you may want to - such as when you are programmatically checking your data as it gets updated.