[dajiaohuang]

What changed

The README describes url() as requiring a protocol and hostname, but new URL() also accepts valid non-host URL forms such as mailto:. The validator now rejects parsed URLs without a hostname while continuing to accept host-bearing custom schemes. Error messages remain generic and do not include the input value.

Tests and validation

• Added a synthetic mailto: case; it failed before the change because validation accepted it.
• bun run test:ci -- tests/validators.test.ts — 9 passed
• bun run ts — passed
• bun run lint — passed
• git diff --check — passed

No real process.env, .env, credentials, user profile, deployment configuration, or service was accessed. No full suite/build was run.

[af]

Thanks for the PR! I don't really see this as a problem though– if it's a valid url, it's a valid url. If you want to create a stricter validation to ensure there's a hostname, a custom validator is probably the right place for that.