Question 1

How do you access a DOM element or child component instance?

Accepted Answer

**Target Audience:** Anyone preparing for a Vue interview. Assumes you know `ref()` and lifecycle hooks at a basic level. **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. All output in the "Verified" sections was produced on Vue 3.5.44 with the repo verifier (compiled and mounted in jsdom) and with Vitest and Vue Test Utils. Real browser layout

Question 2

How do you use TypeScript with Vue (typed props, emits, refs, vue-tsc)?

Accepted Answer

**Target Audience:** Vue developers adopting TypeScript, or TypeScript developers new to Vue's single file components.
**Difficulty:** Medium

> **How to read this doc:** Plain language first, then `📌 Interview term:` callouts. Every type error below is real output from `vue-tsc` 3.3.13 with TypeScript 5.9 and `strict: true`; compiled output comes from `@vue/compiler-sfc` 3.5.44; runtime behaviour and warnings come from mounting the components in jsdom on Vue 3.5.44; the `vite build` result is

Question 3

What is useTemplateRef() (Vue 3.5) and how does it improve on ref=""?

Accepted Answer

**Target Audience:** Vue developers who already use template refs and want to know what changed in 3.5. The general rules for refs (timing, `v-for`, component instances) are in [accessing a DOM element or child component instance](/interview-question/how-do-you-access-a-dom-element-or-child-component-instance). **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 interviewe

VUE.JSDECODED.

Medium

How do you access a DOM element or child component instance?

How do you use TypeScript with Vue (typed props, emits, refs, vue-tsc)?

What is useTemplateRef() (Vue 3.5) and how does it improve on ref=""?