vuejs/core

Features

• Component-Based UI Architectures - A modular architecture where developers build complex interfaces by composing reusable, encapsulated units of logic and markup.
• Reactive State Management - Vue tracks and triggers reactivity by intercepting property access on objects using proxies or getter and setter functions to automatically update dependencies when values change.
• Reactive UI Frameworks - A declarative library that synchronizes component state with the document object model using a reactive data-binding system.
• Single Page Applications - Vue develops rich, stateful applications that handle navigation and data updates on the client side without page reloads, supported by a comprehensive ecosystem of routing and tooling.
• Universal Rendering Frameworks - Vue writes universal code that executes correctly on both server and client by avoiding platform-specific globals and managing side effects within appropriate lifecycle hooks.
• Component Lifecycle Hooks - Vue provides lifecycle hooks that allow developers to register callback functions to execute at specific stages of a component's existence, such as mounting, updating, or unmounting.
• Component-Based Architectures - Structuring complex web applications into modular, reusable, and encapsulated pieces of code that manage their own logic and presentation.
• Composable Logic Patterns - Vue organizes complex component logic into smaller, modular functions based on logical concerns to improve code readability and maintainability as component complexity grows.
• Single-File Components - Vue encapsulates component templates, logic, and styles within a single file using a specialized format that colocalizes related concerns for better modularity and development experience.
• Component Data Passing - Vue sends data from parent to child components by declaring custom attributes that the child can access within its template and logic.
• Component Composition - Vue registers and includes child components within a parent to build modular interfaces with independent state and logic for each part of the UI.
• Event Emitters - Vue sends custom events from child components to parents using built-in methods to facilitate communication and state updates across the component tree.
• Event Emitters - Vue handles communication from child to parent by responding to custom events emitted by the child using standard event-binding syntax.
• Content Distribution Slots - Vue injects custom markup into a component template by using placeholders that allow parent components to provide flexible content structures.
• Reactive Prop Destructuring - Vue extracts reactive properties directly in script blocks to simplify component logic while maintaining automatic dependency tracking and support for default values.
• Two-Way Data Bindings - Vue syncs data between parent and child components by automatically updating the parent state when the child emits changes to its local value.
• Reactive Directives - Vue applies special reactive behavior to document elements using prefixed attributes that can accept arguments, dynamic arguments, and modifiers to customize their functionality.
• Computed Property Caching - Vue optimizes performance by caching computed results based on reactive dependencies, preventing unnecessary re-execution of expensive logic unless the underlying source data has changed.
• Proxy-Based Reactivity - Tracks state changes by wrapping objects in proxies to automatically trigger dependency updates when properties are accessed or mutated.
• Proxy-based State Observation - Vue declares reactive state using proxies that intercept property access and mutation, enabling deep reactivity for objects, arrays, and collection types.
• Reactive State Watchers - Vue watches reactive state changes and executes custom callback functions to perform side effects like document mutations or asynchronous data fetching.
• Reactive State Wrappers - Vue declares reactive state using a wrapper object that holds a value, allowing for primitive types and automatic unwrapping when accessed within component templates.
• Virtual DOM Reconciliation - Maintains a lightweight tree of objects in memory to calculate the minimal set of changes required to update the actual document.
• Virtual DOM Renderers - A rendering engine that manages UI updates by comparing snapshots of the component tree to minimize direct document manipulation.
• Virtual DOM Representations - Vue represents UI structures as plain objects in memory to allow declarative composition and programmatic inspection of the interface before syncing with the actual document.
• Effect-Based Rendering - Executes a multi-stage process that compiles templates into reactive effects to synchronize the virtual tree with the browser document.
• Stateful Composables - Vue encapsulates stateful logic into reusable functions to manage state, lifecycle hooks, and side effects across multiple components.
• Data Interpolation - Vue interpolates reactive data into the document using syntax that automatically updates the rendered text whenever the underlying component property changes.
• HTML Attribute Bindings - Vue binds HTML attributes to component properties reactively, supporting shorthand syntax, boolean attribute toggling, and dynamic binding of multiple attributes.
• List Rendering Directives - Vue renders lists of items by iterating over arrays, objects, or ranges using a directive that supports index aliases, destructuring, and nested scoping.
• Template Expression Evaluators - Vue evaluates expressions within templates to perform data transformations, call component methods, or compute values directly inside bindings and interpolations.
• Component Property Definitions - Vue defines component props using either runtime declarations or type-based generic arguments to ensure type safety and proper inference for component properties within the setup context.
• Component Type Definitions - Vue enables typed support within single-file components by adding a language attribute to script tags, which also activates stricter type checking for expressions used in templates.
• Reactive State Typing - Vue specifies complex types for reactive references by using generic arguments or explicit type annotations to override default inference and handle union types or optional values.
• Component Definitions - Vue creates reusable interface elements using either single-file structures or plain objects to organize code and maintain consistent UI patterns across an application.
• Reactive User Interfaces - Building dynamic and interactive web interfaces where the view automatically updates in response to changes in underlying application state.
• Compile-Time Template Optimizations - Analyzes component templates during the build process to generate efficient render functions that skip static nodes during updates.
• Single-File Component Formats - A specialized file structure that colocalizes template, logic, and styling to simplify the development of modular interface components.
• Single-File Components - Groups template, logic, and styles into a single file format to colocalize related concerns and simplify modular development.
• Slot Content Passing - Vue provides template fragments from a parent to a child component to be rendered at specific locations within the child's structure.
• Prop Declarations - Vue defines expected data types for component properties to document the interface and ensure that parent components provide the correct information.
• Component Data Provision - Vue shares reactive state with descendant components using unique keys to simplify data access in complex component trees without manual prop drilling.
• DOM Event Listeners - Vue listens to DOM events using a directive that executes inline code or calls component methods when the specified event is triggered on an element.
• Progressive Frameworks - A scalable development environment that supports everything from simple script-based enhancements to complex, server-rendered single-page applications.
• Hydration Mechanisms - Vue hydrates static server-rendered HTML into a fully interactive application on the client by attaching event listeners and initializing the component state.
• Event Emission Definitions - Vue defines and validates component events using runtime declarations or type-based syntax to enforce strict type constraints on emitted event names and their associated payload parameters.
• Virtual Node Creators - Vue creates virtual nodes using a flexible hyperscript function that accepts type, properties, and children to define the structure of your component's output.
• Client-Side Routers - Vue manages application views in the browser by intercepting navigation and updating the interface without full page reloads, using browser history or hash change events.
• Async Dependency Orchestration - Vue displays a fallback UI until all nested asynchronous components and their required data are fully resolved to ensure a smooth and complete visual experience.
• Component Build Processors - Vue processes single-file components using low-level compiler utilities or build-tool plugins to integrate component support into custom build pipelines or specific bundlers.
• Data Flow Patterns - Vue maintains data integrity by treating props as read-only, ensuring that parent state updates propagate correctly without accidental mutations in child components.
• Dynamic Component Renderers - Vue switches between different component types at runtime by binding a component reference to a placeholder element for flexible UI composition.
• Event Payload Passing - Vue sends data payloads along with custom events so that parent listeners can receive and process specific information from the child component.
• Scoped Slots - Vue shares data from a child component with the parent's slot content to allow the parent to customize the rendering based on child-scope state.
• Component Prop Validation - Vue verifies incoming data using type checks, required flags, and custom validator functions to ensure component stability and provide helpful feedback during development.
• Event Emission Declarations - Vue declares expected event payloads using object syntax to enable runtime validation and ensure type safety when emitting events from within component methods.
• Asynchronous Components - Vue loads components on demand using a promise-based approach to reduce initial bundle size and improve performance by fetching code only when it is needed.
• Reactive Injection Management - Vue maintains reactive connections between providers and consumers by sharing stateful values that update automatically across the component hierarchy.
• Reactive Dependency Injection - Shares reactive state across deep component trees using unique keys to avoid manual property drilling between parent and child components.
• Component Logic Composables - Vue reuses component logic across projects by extracting stateful functionality into composable functions that integrate seamlessly with the reactivity system and third-party libraries.
• Two-Way Data Bindings - Vue binds form input elements to application state using a directive that automatically synchronizes data between the interface and the underlying data model.
• Reactive List Updates - Vue updates rendered lists automatically by using reactive array mutation methods or by replacing the array with a new version using non-mutating methods.
• Hydration Strategies - Vue optimizes initial page load performance by delaying the hydration of server-rendered components until specific conditions like idle time or user visibility are met.
• Component Update Optimizations - Vue minimizes component re-renders by stabilizing props, memoizing static content, and using computed properties that only trigger updates when their values change.
• Build Optimizations - Vue optimizes production builds by removing development-only code branches, such as warnings and debugging hooks, to reduce payload size and improve application performance.
• Automatic Dependency Tracking - Vue tracks reactive dependencies automatically within a callback function, eliminating the need to manually specify watched sources for complex or multi-dependency logic.
• Computed Properties - Vue defines computed properties to derive complex state from reactive data, ensuring the logic remains clean, maintainable, and automatically updates when dependencies change.
• Deep Property Watchers - Vue traverses nested object properties to trigger callbacks on deep mutations, with optional depth limits for performance control on large data structures.
• Side Effect Cleanup Utilities - Vue registers cleanup functions to cancel stale asynchronous operations or reset state when a watcher re-runs or is invalidated.
• Writable Computed Properties - Vue creates writable computed properties by providing both a getter and a setter, allowing two-way data binding or manual updates that propagate changes back to the source state.
• Compiler Optimizations - Vue optimizes runtime performance by using compile-time analysis to inject hints into generated code, enabling the renderer to skip unnecessary tree traversals and static node re-creation.
• Server-Side Rendering - Improving search engine visibility and initial load performance by rendering application components into static HTML on the server.
• Template Security Policies - Vue restricts component templates to trusted, developer-controlled content to prevent arbitrary code execution and potential server-side breaches during the rendering process.
• Reactive State Composables - Vue returns plain objects containing multiple references from composables to ensure reactivity is preserved when the returned state is destructured in consuming components.
• Centralized State Containers - Vue integrates a dedicated state management library to handle complex application requirements like development tools, hot module replacement, and server-side rendering in large-scale production projects.
• Template Logic Implementations - Vue implements common template features like conditional rendering, list iteration, and event handling using standard logic within render functions or syntax extensions.
• Conditional Rendering Directives - Vue renders elements conditionally by evaluating expressions, supporting if-else logic to control the presence of blocks in the document based on truthy values.
• List State Maintenance - Vue tracks node identity during list updates by providing a unique key attribute, allowing efficient element reuse and reordering when data changes.
• Conditional Visibility Toggling - Vue toggles the visibility of elements using CSS display properties while keeping them in the document, which is efficient for frequently toggled content.
• Cross-Framework Web Components - Building standard-compliant custom elements that can be embedded into any web project regardless of the underlying technology stack.
• Suspense Boundaries - Vue coordinates loading states across nested components by delegating asynchronous tasks to a parent boundary to prevent redundant loading cycles and flickering empty states.
• Attribute Inheritance Patterns - Vue passes attributes and event listeners automatically to the root element of a component when they are not explicitly defined as props or events.
• Named Slot Definitions - Vue creates multiple content placeholders within a single component to allow parents to inject specific fragments into designated areas of the template.
• Reactive Input Adapters - Vue accepts reactive references or getter functions as input arguments in composables to enable dynamic reactivity and automatic re-execution when dependencies change.
• Initial Page Load Optimizations - Vue optimizes initial page load by supporting server-side rendering architectures and reducing bundle sizes through tree-shaking and pre-compiled templates.
• Server Side Rendering Strategies - Vue renders application components into HTML strings on the server to improve search engine optimization and initial load performance, followed by client-side hydration to enable interactivity.
• Application Plugins - Vue extends application functionality by creating plugins that register global components, directives, or properties, and provide injectable resources to components throughout the entire application.
• Attribute Fallthroughs - Vue retrieves attributes passed to a component programmatically within the component logic to handle custom styling or behavior based on external configuration.
• Event Declarations - Vue defines events explicitly to improve documentation, enable type safety, and allow for runtime validation of the data sent from child to parent.
• Exposed Component APIs - Vue exposes specific properties or methods from a child component to a parent by using a macro to define a public interface for the component instance.
• Multiple Model Bindings - Vue creates several independent data bindings on a single component instance by assigning unique arguments to each model directive.
• Component Data Injection - Vue accesses data provided by ancestor components to share state across deep component trees without the need for manual property passing at every level.
• Content Teleportation - Vue moves component content to a different location in the document structure while keeping the original logical hierarchy and state management intact for consistent behavior.
• Large Dataset Optimizations - Vue improves rendering performance for large datasets by virtualizing lists and opting out of deep reactivity for large, immutable data structures.
• Functional Components - Vue defines lightweight, stateless components as pure functions that accept props and context to return virtual nodes without the overhead of component instances or lifecycle hooks.
• Component Instance Caching - Vue preserves component state by keeping instances in memory when switching views to avoid re-initialization and maintain user progress across different parts of the interface.
• Global Reactive Stores - Vue creates a global reactive store by exporting a reactive object, allowing multiple components to share and mutate a single source of truth for application state.
• Style Bindings - Vue binds inline styles dynamically using objects or arrays of objects, with automatic vendor prefixing and support for standard CSS property names.
• Component Testing Frameworks - Vue tests individual components in isolation by asserting on their public interfaces, such as props, events, and slots, while simulating user interactions to verify expected behavior.
• Dependency Injection Type Definitions - Vue syncs types between providers and consumers using injection keys or explicit generic declarations to ensure type safety when sharing data across component hierarchies.
• Generic Component Definitions - Vue creates reusable components that accept generic type parameters using specific attributes in script blocks or through function signatures in render functions.
• Component Type Checkers - Vue performs command-line type checking and generates type declarations for components using a dedicated utility that extends standard checks to include single-file components.
• JSX Extensions - Vue authors component templates using an XML-like syntax extension that compiles to virtual nodes, supporting dynamic values and custom type definitions for typed projects.
• Transition Lifecycle Hooks - Vue executes custom JavaScript logic or animations at specific stages of an element's lifecycle by listening to transition events during insertion and removal.
• State-driven Animations - Vue applies transition effects by interpolating reactive values and binding them to element styles, allowing for dynamic animations driven by user interactions or state updates.
• Template Reference Accessors - Vue accesses document elements or child component instances directly by assigning a reference attribute in the template and retrieving the value after the component mounts.
• Component API Styles - Vue combines different component definition styles within the same component to leverage existing code while adopting more scalable patterns for complex application logic.
• Local Component Registration - Vue limits component availability to a specific parent to improve code organization and enable better tree-shaking for unused components.
• Global Component Registration - Vue makes components available throughout the entire application by registering them on the main instance to simplify usage in templates.
• Binding Modifiers - Vue transforms data during binding by applying custom modifiers to model values to handle formatting or input processing automatically.
• Filtered Result Displays - Vue displays filtered or sorted versions of data by using computed properties or methods to return transformed arrays without mutating the original source data.
• Symbol Injection Keys - Vue uses unique symbols for dependency injection to avoid naming collisions when building reusable components or working in large-scale applications.
• Project Scaffolding Tools - Vue scaffolds a new project using a command-line tool that configures build settings, type checking, testing, and state management for application development.
• Source Code Linters - Vue lints source code using specialized plugins that enforce style rules and catch common errors within single-file components during development and production builds.
• Custom Directives - Vue registers custom directives to encapsulate low-level document manipulation logic on elements, using lifecycle hooks to manage element state during the component's lifecycle.
• Application Performance Profiling - Vue allows measuring application performance using browser-native tools or markers to identify bottlenecks during local development and production deployment.
• Watcher Callback Timing - Vue configures the timing of watcher callback execution relative to component updates, allowing for pre-update, post-update, or synchronous triggering.
• Watcher Execution Strategies - Vue executes watcher callbacks immediately upon creation before any reactive state changes occur, ensuring initial logic runs during component setup.
• Input Modifiers - Vue applies modifiers to input bindings to control synchronization timing, automatically cast input values to numbers, or trim whitespace from user-provided text.
• Function References - Vue binds a function to a reference attribute to receive the element instance directly, allowing custom logic for storing or managing the element reference during updates.
• Dynamic Class Bindings - Vue binds HTML classes dynamically by passing objects or arrays to the class attribute, allowing conditional toggling of class names based on component state or computed properties.
• Global Property Augmentations - Vue augments global component properties by extending the interface to include custom plugins or utilities, ensuring type safety when accessing them via the component instance.
• CSS Transition Applications - Vue defines visual transition states using standard CSS classes that automatically trigger during the insertion or removal of elements from the document.
• Transition Sequencing Controls - Vue controls the sequence of entering and leaving elements by specifying whether animations occur simultaneously or sequentially to create polished visual transitions.
• List Transitions - Vue applies smooth animations to list items as they enter, leave, or change position within a collection to provide visual feedback during data updates.
• Transition Wrappers - Vue applies enter and leave animations to UI elements using a wrapper that detects CSS transitions or JavaScript hooks to manage timing and visual effects.
• Custom Elements - Vue creates custom elements from standard component definitions by converting them into native constructors that manage shadow document, lifecycle hooks, and internal state automatically.