Ajv version 7 is released! - Ajv

Ajv version 7 has these new features:

support of JSON Schema draft-2019-09 features: <a href="/json-schema.html#keywords-for-objects">unevaluatedProperties</a> and <a href="/json-schema.html#unevaluateditems">unevaluatedItems</a>, <a href="/guide/combining-schemas.html#extending-recursive-schemas">dynamic recursive references</a> and other <a href="/json-schema.html#json-schema-draft-2019-09">additional keywords</a>.
to reduce the mistakes in JSON schemas and unexpected validation results, <a href="/strict-mode.html">strict mode</a> is added - it prohibits ignored or ambiguous JSON Schema elements.
to make code injection from untrusted schemas impossible, <a href="/codegen.html">code generation</a> is fully re-written to be safe and to allow code optimization (compiled schema code size is reduced by more than 10%).

to simplify Ajv extensions, the new keyword API that is used by pre-defined keywords is available to user-defined keywords - it is much easier to define any keywords now, especially with subschemas. ajv-keywords package was updated to use the new API (in v4.0.0)
schemas are compiled to ES6 code (ES5 code generation is also supported with an option).
to improve reliability and maintainability the code is migrated to TypeScript.

Please note:

the support for JSON-Schema draft-04 is removed - if you have schemas using "id" attributes you have to replace them with "$id" (or continue using Ajv v6 that will be supported until 02/28/2021).
all formats are separated to ajv-formats package - they have to be explicitly added if you use them.

See release notes for the details.

To install the new version:

bash

npm install ajv

See Getting started for code examples.