custom-format-validators

To add a custom format validator to z-schema, you register it globally or per-instance using customFormats, allowing stricter data checks beyond built-in formats for both sync and async validation.

z-schema supports async format validation by registering async validators across global and instance scopes, utilizing the asyncTimeout option to manage execution limits for non-blocking custom format checks.

Global custom format registration applies validators universally across a z-schema instance, while instance-level registration targets specific schemas, enabling per-schema overrides for distinct validation rules.

You can inspect registered custom formats in z-schema by utilizing provided tools to list and document active format validators, ensuring visibility into applied sync and async validation rules.

z-schema allows applying custom format validators to non-string inputs, extending format assertions beyond standard string checks to enforce custom data rules across various data types.

Manage draft-specific behavior for custom formats in z-schema by configuring formatAssertions and related options, ensuring custom validators align with the targeted JSON Schema draft specifications.