Q: useAttrs() vs $attrs — how do you handle fallthrough attributes in composition API?

**Target Audience:** Vue developers moving to ` ` and the Composition API. Assumes you know what [fallthrough attributes ($attrs)](/interview-question/what-are-fallthrough-attributes-attrs) are; that sibling question covers the inheritance rules themselves. **Difficulty:** Medium > **How to read this doc:** Ideas are explained in plain language first, then tagged with 📌 Interview term: so you also learn the words an interviewer listens for. Every output in the "Verifi

Question 1

What do defineOptions() and defineSlots() do in <script setup>?

Accepted Answer

**Target Audience:** Vue developers using `<script setup>` who want the remaining component options and typed slots.
**Difficulty:** Medium

> **How to read this doc:** Plain language first, then `📌 Interview term:` callouts. The compiler output and every error message below come from running `@vue/compiler-sfc` 3.5.44; the runnable example was mounted in jsdom; the type errors come from `vue-tsc` 3.3.13. The version claims were checked against the published `@vue/runtime-core` type definitions

Question 2

What is defineExpose?

Accepted Answer

**Target Audience:** Anyone preparing for a Vue interview who has used `

Question 3

useAttrs() vs $attrs — how do you handle fallthrough attributes in composition API?

Accepted Answer

**Target Audience:** Vue developers moving to `

VUE.JSDECODED.

Medium

What do defineOptions() and defineSlots() do in <script setup>?

What is defineExpose?

useAttrs() vs $attrs — how do you handle fallthrough attributes in composition API?