[hugomallet]

Fixes

• isFieldInvalid: isFieldInvalid(['a', 'b']) only checked the first name (getFieldErrors(...tuple) dropped the rest). Now passes the array directly — getFieldErrors already accepts one.
• scrollToFirstError guard: when no DOM element carries the first error's name (custom field, required error on a nested object), undefined was forwarded to scrollToElement. Now returns early.
• Keyboard a11y (Audit 2026-07 : améliorations (accessibilité, bugs helpers, dépendances, outillage) #57): after scrolling, focus moves to the first invalid field via element.focus({ preventScroll: true }).

Tests

3 new tests, each verified to fail against the un-fixed code:

• multi-name isFieldInvalid with the error on the second name only
• invalid submit with no matching DOM element does not throw
• after an invalid submit, document.activeElement is the invalid field

CI=true yarn test:runtime: 6 suites, 66 tests (63 on master), 5 snapshots — all green.

[hugomallet]

Code review (tooled self-review)

Disclosure: PR authored under my own account, so GitHub won't accept an APPROVE — this is a tooled self-review posted as a comment. Review ran on a clean worktree: ESLint + tsc --noEmit clean, full suite green (6 suites, 66 tests, 5 snapshots).

Verdict: mergeable — minor comments only, none blocking.

Verified

• isFieldInvalid multi-name: passing names straight to getFieldErrors yields the union of filterByFieldNameWithWildcard per name — correct OR semantics, wildcards (user.*) preserved.
• Guard: on the submit path errors[0] is always defined (handleSubmitError only runs when valid is false; AJV guarantees non-empty errors then, and formatErrors maps 1:1 without filtering).
• Focus: a non-focusable element carrying name (e.g. a div) makes focus() a harmless no-op; preventScroll correctly avoids fighting the 900ms animated scroll.
• Scope: strictly Form.js + Form.test.js, no snapshot change needed — confirmed by the full run.

Minor (grouped, take or leave)

1. scrollToFirstError direct call (Form.js:343): a consumer calling it via instance ref on a valid form hits firstError.field → TypeError. One-line hardening: if (!firstError) return; above the DOM lookup.
2. preventScroll on old Safari (< 15, still within >0.2% browserslist): the option is ignored, so focus triggers an instant scroll competing with the animation. Graceful degradation — fine as is; focusing after the scroll duration would fix it if it ever matters.
3. Focus test cleanup (Form.test.js): wrapper.detach() / removeChild run after the assertion, so a failing expect leaks the attached container into later tests. try/finally (or afterEach) would make it robust.
4. Micro: isFieldInvalid normalizes fieldNames into names, then getFieldErrors re-normalizes — the local array could be dropped.

Aside (pre-existing, out of scope)

The should match snapshot test fails when the suite runs alone (--testPathPattern Form/Form.test.js): the snapshot serializes the AJV instance, which embeds jest's console (BufferedConsole vs CustomConsole depending on worker mode). Not caused by this PR — worth a follow-up to stop snapshotting the AJV instance.