Practice Vue 3 Composition API, reactivity system, and component design patterns with realistic interview questions
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Understand Vue's reactivity internals and how to optimize performance
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Vue 3 Composition API and reactive patterns
Component lifecycle hooks and watchers
Vuex and Pinia state management
Vue Router navigation and guards
Directives and custom directives
Nuxt.js and server-side rendering
A: ref is used for primitive values and creates a reactive reference with a .value property. reactive is for objects and makes them deeply reactive. ref is better for primitives and single values, while reactive works well for complex objects. Note that reactive cannot be used with primitives and loses reactivity if destructured.
A: Vue 3 uses Proxy-based reactivity. When you access a reactive property, Vue tracks it as a dependency. When that property changes, Vue triggers updates to all components that depend on it. The Composition API uses effect tracking - functions like computed and watchEffect automatically track their dependencies.
A: Pinia is the recommended state management solution for Vue 3. Unlike Vuex, Pinia has no mutations (only actions), better TypeScript support, no nested modules, and a simpler API. Pinia stores are more modular and can be used independently, while Vuex uses a single centralized store pattern.
A: Navigation guards are hooks that let you control navigation. Global guards (beforeEach, afterEach) run on all routes. Per-route guards (beforeEnter) run on specific routes. Component guards (beforeRouteEnter, beforeRouteUpdate, beforeRouteLeave) run in components. Guards can cancel navigation, redirect, or allow it to proceed using next().
Understand the difference between Options API and Composition API and when to use each
Practice creating custom composables for reusable logic
Know how to optimize performance with computed properties and watchers
Be familiar with Vue 3's new features like Teleport, Suspense, and Fragments
Understand how Vue's reactivity system works under the hood with Proxy
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