This document describes changes from v7.2.4 to v8.0.0.
If you are migrating from v6 you can use this document.
New features
Support JSON Schema draft-2020-12: prefixItems keyword and changed semantics of items keyword, dynamic recursive references.
OpenAPI discriminator keyword.
Improved JSON Type Definition support:
- errors consistent with JTD specification.
- error objects with additional properties to simplify error handling (see Error objects)
- internationalized error messages with ajv-i18n
TypeScript: support type unions in JSONSchemaType
Other changes / improvements
Node.js require works without .default property - see examples in Getting started
Reduce runtime dependency for standalone validation code
Fix resolution of $ref: "#" when $id is present (#815)
Breaking changes
Option strict controls all strict mode restrictions
JSON Schema validation errors changes:
dataPathproperty replaced withinstancePath- "should" replaced with "must" in the messages
- property name is removed from "propertyName" keyword error message (it is still available in
error.params.propertyName).