[chiliec]

Fixes #1915

What

vue/no-undef-properties reported every template reference as undefined when a component exposes state via ...toRefs(data) from setup(), where data is a const bound to reactive({ ... }) (the exact example from the issue). The rule only collected explicit Property entries from the setup() return object and ignored spreads.

Fix

In onVueObjectEnter, walk the setup() return object(s) for SpreadElements whose argument is a toRefs(...) call (tracked via ReferenceTracker, same approach as property-references.ts) and resolve its argument to a reactive({ ... }) object literal — either inline (toRefs(reactive({...}))) or through a single-definition const initialized with reactive({...}). The keys of that literal are then registered as defined setup properties. Anything not statically resolvable (non-const, reassigned, non-literal reactive arg, unknown call) is left untouched, so existing reporting is unchanged.

Tests

• valid: const data = reactive({a, b}); return { ...toRefs(data) } (issue repro) and inline setup: () => ({ ...toRefs(reactive({ a })), ...toRefs(reactive({ b, c })) })
• invalid: same shape but the template references c which is not in the reactive object → still reported

Validation

• npx vitest run tests/lib/rules/no-undef-properties.test.ts → 81 passed (78 before + 3 new)
• RED→GREEN: with the rule change stashed, the 3 new cases fail ('a' is not defined., 'b' is not defined., and the invalid case reports extra a/b); with it restored, all pass
• npm run build && npx vitest run tests/lib → 288 files, 11624 tests passed
• npx eslint lib/rules/no-undef-properties.ts tests/lib/rules/no-undef-properties.test.ts → clean; prettier --check clean
• npx tsc → 27 pre-existing errors (all ../../../../../dist module resolution in tests before npm run build), none in the touched files; identical count on a clean checkout

Changeset added (patch). Happy to adjust.

[changeset-bot]

🦋 Changeset detected

Latest commit: 2fe7c20

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
eslint-plugin-vue	Patch

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[FloEdelmann]

Makes sense to me. I have two small suggestions, see below.

[FloEdelmann]

Thanks!

[ota-meshi]

LGTM! Thank you!