custom-format-validators

JSON Schema format constrains string (or other) values beyond basic type checking. z-schema includes built-in validators and supports registering custom ones — both sync and async.

z-schema ships with validators for all standard JSON Schema formats:

| date | RFC 3339 full-date (2024-01-15) | | date-time | RFC 3339 date-time (2024-01-15T09:30:00Z) | | time | RFC 3339 time (09:30:00Z) | | email | RFC 5321 email address | | idn-email | Internationalized email | | hostname | RFC 1123 hostname | | idn-hostname | Internationalized hostname | | ipv4 | IPv4 address | | ipv6 | IPv6 address |

Registers and manages custom format validators in z-schema. Use when the user needs to add custom format validation, create sync or async format validators, register formats globally or per instance, validate emails or dates or phone numbers or custom business rules with format, configure formatAssertions for vocabulary-aware behavior, use customFormats option, list registered formats, handle async format timeouts, or understand how format validation differs across JSON Schema drafts. Source: zaggino/z-schema.