Executive Summary
Vue.js maintains a strong position in the frontend ecosystem in 2026 with 19% developer adoption. While React leads at 67%, Vue offers a distinctly different developer experience: a cohesive, batteries-included framework with an approachable learning curve, built-in state management (Pinia), an official meta-framework (Nuxt), and a reactivity system that inspired frameworks across the ecosystem. Vue 3.5 brought Vapor Mode for compiled reactivity, completing the framework transformation that began with the Composition API.
- Composition API with script setup is the standard for all new Vue projects. It provides TypeScript-first development, reusable composables, and cleaner component organization.
- Pinia replaced Vuex as the official state management library. Its minimal API, full TypeScript support, and devtools integration make it the clear choice for Vue applications.
- Nuxt 4 provides a production-ready full-stack framework with hybrid rendering, server routes, auto imports, and deployment to any platform via Nitro.
- Vapor Mode compiles templates to direct DOM operations without virtual DOM overhead, delivering significant runtime performance improvements.
19%
Developer adoption
20
Composition APIs
10
Nuxt features
42
Glossary terms
Part 1: Vue Adoption Trends (2018-2026)
Vue.js reached peak adoption of 23% in 2021-2022 and has stabilized at 19% in 2026. The decline is relative rather than absolute: the overall frontend market has expanded, and Vue maintans a dedicated community of millions of developers. Vue is particularly strong in Asia (China, Japan, Korea), where it often rivals or exceeds React usage. In Europe, Vue has significant adoption in France, Germany, and the Netherlands.
Nuxt follows a parallel growth trajectory, rising from 3% in 2018 to 18% in 2026. As the official full-stack Vue framework, Nuxt provides file-based routing, SSR/SSG, auto imports, server routes, and deployment to any platform. Nuxt 4 brought stabilized APIs, improved TypeScript support, and Nuxt Hub for zero-config deployment with built-in database, KV storage, and blob storage.
Vue ecosystem highlights in 2026 include VueUse (200+ composables), PrimeVue and Radix Vue for component libraries, VueQuery for server state, FormKit for forms, and Vitest for testing. The Vite build tool, created by Evan You, has become the standard not only for Vue but for React, Svelte, and Solid projects as well, demonstrating Vue core team influence across the frontend ecosystem.
Frontend Framework Adoption (2018-2026)
Source: OnlineTools4Free Research
Part 2: Composition API Reference
The Composition API is Vue 3 function-based approach to component logic. Instead of spreading related logic across data(), methods, computed, and watch (Options API), the Composition API lets you group related code together using reactive primitives: ref() for state, computed() for derived values, watch() for side effects, and lifecycle hooks like onMounted() and onUnmounted().
The script setup syntax (introduced in Vue 3.2) eliminates boilerplate. Top-level bindings in script setup are automatically exposed to the template: no setup() function, no return statement, no defineComponent(). Compile-time macros (defineProps, defineEmits, defineModel, defineExpose) provide type-safe component interfaces without runtime cost. This is the recommended syntax for all new Vue 3 components.
Vue 3.3+ added defineModel() for simplified two-way binding, generic components for type-safe reusable UI, and improved TypeScript inference. Vue 3.4 brought defineSlots() for type-safe slot props, the v-bind same-name shorthand, and performance improvements. Vue 3.5 introduced Vapor Mode for compiled reactivity and reactive props destructure for cleaner component code.
Vue 3 Composition API Reference (20 APIs)
20 rows
| API | Category | Description | Usage Level |
|---|---|---|---|
| ref() | Reactivity | Creates a reactive reference for primitive values. Access via .value in script, auto-unwrapped in template. | Very High |
| reactive() | Reactivity | Creates a reactive proxy for objects. Deep reactivity. No .value needed but cannot destructure. | High |
| computed() | Reactivity | Creates a cached computed value that auto-tracks dependencies. Recalculates only when dependencies change. | Very High |
| watch() | Reactivity | Watches reactive sources and runs callback on change. Supports deep watching, immediate execution, and flush timing. | High |
| watchEffect() | Reactivity | Runs callback immediately and re-runs when any reactive dependency changes. Auto-tracks dependencies. | Medium |
| toRef() | Reactivity | Creates a ref linked to a reactive object property. Maintains reactivity when destructuring. | Medium |
| toRefs() | Reactivity | Converts all properties of a reactive object to individual refs. Enables destructuring without losing reactivity. | Medium |
| shallowRef() | Reactivity | Creates a ref that only tracks .value assignment, not deep changes. Use for large objects where deep tracking is unnecessary. | Low |
| triggerRef() | Reactivity | Force trigger watchers of a shallowRef. Used when you mutate shallowRef value without reassigning. | Low |
| readonly() | Reactivity | Creates a readonly proxy. Attempts to mutate will fail with a warning in development. | Medium |
| provide() | Dependency Injection | Provides a value to all descendant components. Avoids prop drilling. Works with reactive values. | High |
| inject() | Dependency Injection | Injects a value from an ancestor provide(). Supports default values and type-safe injection keys. | High |
| onMounted() | Lifecycle | Called after component is mounted to the DOM. Use for DOM access, third-party library initialization. | Very High |
| onUnmounted() | Lifecycle | Called when component is unmounted. Use for cleanup: event listeners, timers, subscriptions. | High |
| onUpdated() | Lifecycle | Called after the component DOM has been updated. Avoid mutating state here to prevent infinite loops. | Low |
| defineProps() | Components | Compile-time macro to declare component props with type inference. No import needed in <script setup>. | Very High |
| defineEmits() | Components | Compile-time macro to declare emitted events with type-safe payloads. | Very High |
| defineModel() | Components | Compile-time macro for two-way binding (v-model). Replaces modelValue prop + update:modelValue emit pattern. | High |
| defineExpose() | Components | Explicitly exposes component methods/properties to parent via template ref. <script setup> components are closed by default. | Medium |
| useSlots() | Components | Access slot content in Composition API. Returns slots object equivalent to $slots in Options API. | Medium |
Part 3: Reactivity System
Vue 3 reactivity system uses JavaScript Proxy to intercept get and set operations on reactive objects. When a component renders, Vue tracks which reactive properties were accessed (dependency tracking via the get trap). When those properties change (via the set trap), Vue schedules a re-render for only the affected components. This is fundamentally different from React diffing: Vue knows exactly what changed.
ref() wraps any value in a reactive container. For primitives (strings, numbers, booleans), this is necessary because JavaScript primitives are not objects and cannot be proxied. Access the value via .value in script. Templates auto-unwrap refs so you write count instead of count.value. reactive() creates a deep reactive proxy for objects. It does not need .value but cannot hold primitives and loses reactivity when destructured.
computed() creates cached derived values. Unlike a regular function, computed values are memoized and only recalculate when their dependencies change. watch() observes specific reactive sources and runs a callback when they change. watchEffect() auto-tracks all reactive dependencies accessed inside its callback. shallowRef() and shallowReactive() opt out of deep reactivity for performance with large objects.
The reactivity system extends beyond components. You can use ref(), reactive(), computed(), and watch() outside components in plain JavaScript files for shared reactive state. This is the foundation of the composable pattern: encapsulate reactive logic in functions like useCounter(), useAuth(), or useLocalStorage() and reuse them across components. Pinia stores also use the reactivity system internally.
Part 4: Components and Single-File Components
Vue Single-File Components (.vue files) contain three sections: template (HTML with Vue directives), script (component logic), and style (scoped or module CSS). This co-location of concerns makes components self-contained and portable. Vite HMR provides instant feedback: template changes hot-reload without losing state, script changes preserve reactive references when possible.
Props are the primary mechanism for parent-to-child data flow. defineProps() with TypeScript generics provides type-safe props with default values, required markers, and custom validators. Events flow from child to parent via defineEmits(). defineModel() simplifies two-way binding by creating a ref that syncs with the parent v-model. Slots provide content distribution: default slots, named slots, and scoped slots for render delegation.
Component patterns in Vue 2026 include: Compound Components (Tabs with Tab.Panel using provide/inject), Renderless Components (logic-only components using scoped slots), Headless Components (unstyled components via Radix Vue), and Async Components (defineAsyncComponent for lazy loading with loading/error states). Teleport renders content in a different DOM location (modals, tooltips). KeepAlive caches inactive components.
Style handling in Vue supports scoped styles (CSS scoped to the component via data attributes), CSS modules (class name hashing for true isolation), :deep() for child component styling, :slotted() for slot content styling, and v-bind() for reactive CSS values. The style section supports SCSS, Less, and PostCSS out of the box with Vite. Tailwind CSS is the most popular utility framework with Vue in 2026.
Part 5: Pinia State Management
Pinia is the official state management library for Vue, replacing Vuex. Created by Eduardo San Martin Morote (a Vue core team member), Pinia provides a simpler API, full TypeScript support, and Vue DevTools integration. Pinia stores are reactive and work seamlessly with Vue reactivity system. There are no mutations (unlike Vuex): you modify state directly in actions or even from components.
Pinia supports two store definition syntaxes. Options syntax uses defineStore with state(), getters, and actions objects (familiar to Vuex users). Setup syntax uses defineStore with a setup function where you use ref() for state, computed() for getters, and plain functions for actions. Setup syntax is more flexible, supports composables, and is the recommended approach in 2026.
Pinia plugins extend every store with shared functionality. pinia-plugin-persistedstate persists store state to localStorage, sessionStorage, or custom storage. Plugins can add properties, wrap actions for error handling, integrate with routers, or add undo/redo capabilities. Pinia testing is straightforward with createTestingPinia() which auto-mocks actions and allows overriding initial state.
Pinia Store Patterns
8 rows
| Pattern | Syntax | Description | Recommendation |
|---|---|---|---|
| Options Store | defineStore({ state, getters, actions }) | Familiar Options API style. state() returns initial state, getters are computed properties, actions are methods. | Legacy / familiarity |
| Setup Store | defineStore(() => { ... }) | Composition API style. Use ref for state, computed for getters, functions for actions. More flexible. | Preferred in 2026 |
| Composable in Store | Use composables inside setup stores | Import and use any composable (useLocalStorage, useFetch) directly in setup stores. | Encouraged |
| Store Composition | Use one store inside another | Stores can call other stores. Avoid circular dependencies by importing inside actions. | When needed |
| Plugins | pinia.use(plugin) | Extend every store with shared logic: persistence, logging, error tracking, undo/redo. | For cross-cutting concerns |
| SSR Hydration | Automatic with Nuxt | Pinia serializes state on server, hydrates on client. Nuxt handles this automatically. | Required for SSR |
| Testing | createTestingPinia() | Creates a testing Pinia instance with auto-mocked actions. Override initial state for specific tests. | Always for unit tests |
| Hot Module Replacement | acceptHMRUpdate() | Preserves store state during HMR. Add to each store file for seamless development experience. | Always in development |
Part 6: Vue Router
Vue Router is the official routing library for Vue single-page applications. It maps URL paths to components, handles navigation, and manages browser history. Vue Router 4 is designed for Vue 3 with Composition API integration: useRouter() for navigation, useRoute() for route information, and navigation guards as composable functions.
Route definitions include path patterns, component mappings, navigation guards, data pre-fetching (resolve), and metadata. Dynamic routes use :param syntax. Nested routes enable layout patterns where child routes render inside parent RouterView components. Route groups organize related routes. Lazy loading with dynamic imports code-splits each route into a separate chunk.
Navigation guards provide authentication, authorization, and data loading hooks. beforeEach runs before every navigation (global auth check). beforeResolve runs after in-component guards. afterEach runs after navigation completes (analytics, scroll). Per-route guards (beforeEnter) apply to specific routes. In-component guards (onBeforeRouteLeave, onBeforeRouteUpdate) handle component-level navigation logic.
Vue Router Features
9 rows
| Feature | Syntax | Description | Version |
|---|---|---|---|
| Dynamic Routes | /users/:id | Route parameters accessed via useRoute().params. Supports multiple params and custom regex. | 4.0+ |
| Nested Routes | children: [...] | Child routes render inside parent <RouterView>. Enable layout patterns and nested navigation. | 4.0+ |
| Named Views | <RouterView name="sidebar"> | Multiple RouterView outlets on the same page. Each renders a different component. | 4.0+ |
| Navigation Guards | beforeEach, beforeResolve, afterEach | Global, per-route, and in-component guards for authentication, authorization, and data loading. | 4.0+ |
| Lazy Loading | () => import("./Page.vue") | Code-split routes into separate chunks. Loaded on demand. Use with Suspense for loading states. | 4.0+ |
| Scroll Behavior | scrollBehavior(to, from, savedPosition) | Control scroll position on navigation. Restore saved position on back/forward, scroll to top on new pages. | 4.0+ |
| Route Meta | meta: { requiresAuth: true } | Attach custom data to routes. Used in navigation guards for auth, layout selection, breadcrumbs. | 4.0+ |
| Data Loaders | defineLoader() | Experimental. Load data before route component renders. Integrates with Suspense for loading states. | 4.4+ |
| Typed Routes | unplugin-vue-router | Auto-generate route types from file-based routing. Type-safe router.push() and useRoute(). | 4.4+ |
Part 7: Nuxt Framework
Nuxt is the official full-stack framework for Vue. It provides file-based routing, server-side rendering, static site generation, auto imports, server routes, and deployment to any platform. Nuxt 4 brought stabilized APIs, improved TypeScript support, and a polished developer experience. The Nitro server engine powers server routes and deploys to Node.js, Vercel, Netlify, Cloudflare Workers, Deno, and Bun.
Nuxt hybrid rendering (routeRules) enables different rendering strategies per route. Marketing pages can be pre-rendered (SSG), product pages server-rendered (SSR), dashboards client-only (CSR), and API data pages revalidated (ISR/SWR). This flexibility means a single Nuxt application can serve all content types without separate deployments. routeRules also handle redirects, proxying, headers, and CORS.
Nuxt auto imports eliminate manual import statements. Vue APIs (ref, computed, watch), Nuxt composables (useFetch, useAsyncData, useState, useHead), and components in the components/ directory are automatically available. This reduces boilerplate and makes the code more readable. TypeScript support is built-in with auto-generated types for routes, API responses, and configuration.
Nuxt Features
10 rows
| Feature | Description | Status |
|---|---|---|
| File-Based Routing | Pages in pages/ directory automatically become routes. Dynamic params with [id].vue. Nested routes with directories. | Stable |
| Auto Imports | Components, composables, and utilities auto-imported. No manual import statements needed for Vue APIs and Nuxt composables. | Stable |
| Server Routes | API routes in server/api/ directory. Full-stack TypeScript. Direct database access without separate backend. | Stable |
| Hybrid Rendering | Per-route rendering rules: SSR, SSG, CSR, ISR, SWR. Configure in routeRules with glob patterns. | Stable |
| Nitro Engine | Universal server engine. Deploy to Node.js, Vercel, Netlify, Cloudflare Workers, Deno, Bun. Same code everywhere. | Stable |
| Nuxt DevTools | In-browser development panel. Component inspector, route viewer, module list, payload viewer, and timeline. | Stable |
| Server Components | Render components on the server only. Reduce client bundle. Access server-only APIs directly. | Experimental |
| Nuxt Hub | Deployment platform with database (D1), KV storage, blob storage, and caching built-in. Zero-config deployment. | Stable |
| Nuxt Layers | Extend and compose Nuxt applications. Share components, composables, and configuration across projects. | Stable |
| Nuxt Content | File-based CMS. Write content in Markdown, YAML, JSON. Query with MongoDB-like API. Full-text search. | Stable |
Part 8: Composables and Logic Reuse
Composables are the primary mechanism for logic reuse in Vue 3. A composable is a function that uses Composition API features (ref, computed, watch, lifecycle hooks) and returns reactive state and methods. By convention, composable names start with use: useAuth(), useFetch(), useLocalStorage(), useMediaQuery(), useIntersectionObserver(). Composables are the Vue equivalent of React custom hooks.
VueUse provides 200+ production-ready composables organized by category: Browser (useClipboard, useFullscreen, useMediaQuery), Sensors (useMouse, useGeolocation, useDeviceOrientation), Animation (useTransition, useRafFn), State (useLocalStorage, useSessionStorage, useRefHistory), and Utilities (useDebounceFn, useThrottleFn, useEventListener). VueUse composables are tree-shakeable and work with both Vue and Nuxt.
Writing effective composables: accept ref arguments (toValue() unwraps refs and getters), return reactive refs (not raw values), handle cleanup in onUnmounted, and document the return type. Composables can compose other composables. Keep composables focused on a single concern. Extract composables when logic is reused across components or when a component setup function grows beyond readability. Test composables by mounting a wrapper component or using vue-composable-tester.
Part 9: Forms and Validation
Vue provides v-model for two-way binding on form inputs: text, textarea, checkbox, radio, and select. v-model is syntactic sugar for :modelValue and @update:modelValue. Modifiers include .lazy (sync on change instead of input), .number (parse as number), and .trim (trim whitespace). Custom components support multiple v-model bindings for complex form controls.
VeeValidate is the most popular form validation library for Vue. It provides useField() and useForm() composables for field-level and form-level validation. Schemas can be defined with Zod, Yup, or Valibot for type-safe validation that works on both client and server. VeeValidate handles touched/dirty state, error messages, form submission, and array fields for dynamic forms.
FormKit provides a higher-level form building experience: declarative form schema, built-in validation rules, accessible markup, i18n support, and themed input components. It generates entire forms from JSON schema. In Nuxt, forms submit to server routes for full-stack validation. Always validate on both client (user experience) and server (security). Use Zod schemas shared between frontend and backend for consistent validation rules.
Part 10: Testing Strategies
Vue testing in 2026 uses Vitest as the test runner and Vue Test Utils (@vue/test-utils) for component mounting and interaction. Vitest is Vite-native, fast, and API-compatible with Jest. Vue Test Utils provides mount() for full rendering and shallowMount() for isolated component testing. The wrapper API enables finding elements, triggering events, and asserting rendered output.
Component testing best practices: test behavior, not implementation. Simulate user interactions (click, input, submit) and assert visible outcomes (rendered text, emitted events, route changes). Use createTestingPinia() to provide mock stores. Use MSW (Mock Service Worker) for API mocking. Avoid testing internal state; test what the user sees and does. Use data-testid attributes for stable selectors.
End-to-end testing uses Playwright or Cypress. Playwright is recommended for cross-browser testing and CI/CD integration. Nuxt provides @nuxt/test-utils for testing server routes, pages with SSR, and middleware. Use the testing trophy approach: many integration tests (components with dependencies), some unit tests (composables, utilities), and few e2e tests (critical user flows).
Part 11: Performance and Vapor Mode
Vue 3 virtual DOM is already fast due to compile-time optimizations: static hoisting (lift static content out of render function), patch flags (mark dynamic bindings for targeted diffing), and tree flattening (skip static subtrees during diffing). These compiler optimizations make Vue 3 one of the fastest virtual DOM frameworks without requiring manual optimization from developers.
Vapor Mode eliminates the virtual DOM entirely. Instead of creating a virtual DOM tree and diffing it against the previous version, Vapor Mode compiles templates directly into imperative DOM operations: document.createElement(), element.textContent, element.addEventListener(). This removes the virtual DOM overhead entirely, delivering 2-5x better update performance for reactive components.
Performance optimization checklist: use v-once for truly static content, v-memo for expensive list items, shallowRef for large objects, and computed instead of methods for template expressions. Lazy load routes and components with defineAsyncComponent. Use virtual scrolling (vue-virtual-scroller) for long lists. Optimize images with @nuxt/image. Enable Brotli compression. Analyze bundles with rollup-plugin-visualizer. Use web workers for heavy computation.
Part 12: Ecosystem and Tooling
The Vue ecosystem is cohesive and well-maintained. Core libraries (Vue, Vue Router, Pinia, Vite) are developed by the same team, ensuring compatibility and consistent APIs. Community libraries follow established patterns. The Vue team maintains strong backward compatibility: Vue 3 migration from Vue 2 was the exception, not the rule. Vue 3.x releases maintain strict semver compatibility.
Component libraries: PrimeVue (100+ components, accessible, themed), Radix Vue (unstyled primitives), Vuetify (Material Design), Naive UI (TypeScript-first), Element Plus (enterprise), Headless UI (unstyled, Tailwind). CSS: Tailwind CSS dominates, UnoCSS (Vue team created) provides a faster alternative. Icons: unplugin-icons provides 100,000+ icons as Vue components with tree-shaking.
Development tooling: Vite provides instant HMR and optimized builds. Vue DevTools (browser extension and standalone) offers component inspection, state debugging, route visualization, and Pinia store management. Volar provides TypeScript language support in VS Code and other editors. ESLint with eslint-plugin-vue enforces Vue-specific linting rules. Nuxt DevTools provides in-app development panels for routes, components, modules, and payload inspection.
Glossary (42 Terms)
Single-File Component (SFC)
CoreA .vue file containing <template>, <script>, and <style> blocks. The fundamental building block of Vue applications.
Composition API
CoreFunction-based API for organizing component logic. Uses setup() function or <script setup>. Replaces Options API for complex components.
Options API
CoreObject-based API with data(), methods, computed, watch, and lifecycle hooks. Simpler for beginners but harder to reuse logic.
Reactivity
CoreVue system that automatically tracks dependencies and updates the DOM when reactive data changes. Based on JavaScript Proxy in Vue 3.
ref
ReactivityReactive wrapper for primitive values. Access value via .value in JavaScript. Auto-unwrapped in templates.
reactive
ReactivityCreates a deeply reactive proxy for objects. No .value needed. Cannot hold primitives. Loses reactivity when destructured.
computed
ReactivityCached derived value that auto-tracks reactive dependencies. Recalculates only when dependencies change. Read-only by default.
watch
ReactivityObserves reactive sources and runs side effects when they change. Supports deep watching, immediate execution, and cleanup.
Template Refs
CoreDirect access to DOM elements or child component instances via ref attribute. Assigned after component is mounted.
v-model
DirectivesTwo-way data binding directive. Syntactic sugar for :modelValue + @update:modelValue. Supports multiple v-model bindings.
v-if / v-show
DirectivesConditional rendering. v-if removes/adds elements from DOM (higher toggle cost). v-show toggles CSS display (higher initial cost).
v-for
DirectivesList rendering directive. Iterates over arrays, objects, numbers, or ranges. Always use :key for efficient DOM updates.
Slots
ComponentsContent distribution mechanism. Parent passes template content to child component. Named slots and scoped slots for flexible composition.
Props
ComponentsData passed from parent to child component. One-way data flow. Validated with type, required, default, and validator options.
Emits
ComponentsCustom events emitted from child to parent. Declared with defineEmits(). Type-safe event payloads with TypeScript.
Provide / Inject
ComponentsDependency injection across component tree. Parent provides values, any descendant can inject them. Avoids prop drilling.
Composable
PatternsReusable function that encapsulates reactive logic. Convention: useXxx naming. Vue equivalent of React custom hooks.
Pinia
StateOfficial state management library for Vue. Replaces Vuex. Type-safe, devtools integration, SSR support, and plugin system.
Vue Router
RoutingOfficial routing library for Vue. File-based routing, navigation guards, lazy loading, scroll behavior, and typed routes.
Nuxt
FrameworkFull-stack Vue framework. File-based routing, SSR/SSG/ISR, auto imports, server routes, and hybrid rendering.
Nitro
FrameworkUniversal server engine powering Nuxt. Deploys to Node.js, edge workers, serverless. Built-in KV storage, caching, and tasks.
Teleport
CoreRenders component content at a different location in the DOM tree. Used for modals, tooltips, and notifications.
Suspense
CoreBuilt-in component for handling async dependencies. Shows fallback content while async setup() or async components load.
Transition
AnimationBuilt-in component for applying enter/leave animations. CSS transitions, CSS animations, and JavaScript hooks.
TransitionGroup
AnimationAnimates list items when they are inserted, removed, or reordered. Requires unique :key on each item.
KeepAlive
CoreCaches inactive component instances instead of destroying them. Preserves state when switching between dynamic components.
Custom Directive
AdvancedReusable low-level DOM manipulation logic. Lifecycle hooks: created, beforeMount, mounted, beforeUpdate, updated, unmounted.
Plugin
AdvancedSelf-contained code that adds app-level functionality. Register components, directives, provide injections, or augment global properties.
Vite
ToolingBuild tool created by Evan You. Native ES modules in development for instant HMR. Rollup-based production builds.
VueUse
EcosystemCollection of 200+ composables for common tasks: browser APIs, sensors, animations, state, utilities. Drop-in reusable logic.
Shallow Ref
ReactivityReactive reference that only tracks .value reassignment, not deep mutations. Performance optimization for large objects.
Effect Scope
AdvancedAPI to group reactive effects and dispose of them together. Used internally by components and manually for advanced use cases.
Script Setup
Core<script setup> syntax. Compile-time sugar for Composition API. Top-level bindings are exposed to template. No return statement needed.
defineModel
ComponentsMacro for two-way binding in <script setup>. Creates a ref that syncs with parent v-model. Replaces manual prop + emit pattern.
Async Components
ComponentsComponents loaded on demand via defineAsyncComponent(). Supports loading/error states and delay/timeout configuration.
Render Function
AdvancedAlternative to templates using JavaScript h() function. Provides full programmatic power for dynamic rendering.
SSR Hydration
SSRProcess of making server-rendered HTML interactive by attaching event listeners and reactive state on the client.
Vapor Mode
FutureExperimental compilation strategy that eliminates virtual DOM overhead. Compiles templates to direct DOM operations for better performance.
Vue DevTools
ToolingBrowser extension for debugging Vue applications. Component tree, state inspector, Pinia store viewer, router, timeline.
Nuxt DevTools
ToolingIn-app development panel for Nuxt. Component inspector, route visualizer, module list, payload viewer, and VS Code integration.
Route Rules
FrameworkNuxt configuration for per-route rendering behavior. SSR, SSG, ISR, SWR, redirect, proxy, headers, and CORS settings.
Auto Imports
FrameworkNuxt feature that automatically imports Vue APIs, composables, and components. No manual import statements needed.
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