Vue Router Interview Questions

Vue Router is the official routing library for Vue.js. Enables navigation between pages, supports nested routes, dynamic route matching, navigation guards, and route meta fields. Integrates with Vue.js transitions.

Install using npm/yarn, create router instance with createRouter(), configure routes array with path and component mappings. Use history mode (createWebHistory) or hash mode.

Dynamic segments in route path marked with colon. Example: /user/:id. Access via useRoute().params or $route.params. Support optional parameters and custom regex patterns.

Define child routes in children array of parent route. Use router-view for nested components. Support multiple levels of nesting. Handle nested layouts.

Middleware functions that guard navigations. Include beforeEach, beforeResolve, afterEach globally, and beforeEnter per route. Handle authentication and authorization.

Component for declarative navigation. Supports to prop for destination, active class styling. Example: <router-link to='/path'>. Handles both literal and dynamic paths.

Navigate using router.push() or router.replace(). Support path object notation. Handle navigation with useRouter() in composition API. Support navigation parameters.

Access via useRoute().query or $route.query. Support multiple parameters. Handle URL encoding. Persist across navigations. Example: /search?q=term.

Routes with name property for reference. Use in router-link :to='{ name: 'route' }'. Support params binding. Avoid hard-coded URLs. Example: name: 'user'.

Custom fields in meta property of routes. Access via route.meta. Use for route-specific data. Handle authorization, transitions, or any custom data.

Use transition component around router-view. Support enter/leave transitions. Handle per-route transitions. Implement transition modes. Handle dynamic transitions.

Configure scrollBehavior in router options. Handle scroll position restoration. Support smooth scrolling. Implement scroll preservation. Handle async scrolling.

Combine multiple guards. Handle guard chain. Support async guards. Implement guard utilities. Handle guard ordering.

Define alias property in routes. Support multiple aliases. Handle SEO considerations. Implement redirect patterns. Handle alias conflicts.

Enable props in route configuration. Support boolean mode, object mode, function mode. Handle prop types. Implement prop validation.

Handle data fetching in navigation guards or setup(). Support loading states. Implement error handling. Handle data dependencies.

Use regex patterns in route paths. Support parameter constraints. Handle wildcard routes. Implement matching strategies.

Implement error pages. Handle navigation errors. Support error recovery. Implement error boundaries. Handle error logging.

Create complex routing systems. Handle advanced scenarios. Support pattern composition. Implement routing strategies.

Optimize route configuration. Handle route caching. Support code splitting. Implement performance strategies. Handle route priorities.

Create router test suites. Handle navigation testing. Support guard testing. Implement test utilities. Handle test coverage.

Implement route protection. Handle authentication flows. Support authorization. Implement security patterns. Handle security policies.

Track navigation metrics. Handle analytics integration. Support performance monitoring. Implement monitoring strategies.

Design scalable routing systems. Handle route organization. Support architecture patterns. Implement routing hierarchy.

Implement deployment strategies. Handle server configuration. Support hosting platforms. Implement deployment patterns.

Handle route structure changes. Support path migrations. Implement redirects. Handle compatibility. Manage migration state.