nodejs/nodejs.org

Features

• JavaScript Runtimes - Is a cross-platform JavaScript runtime built on the V8 engine for executing code outside a browser.
• Server-Side JavaScript Runtimes - The core identity of this repository: a server-side JavaScript runtime built on the V8 engine.
• Node.js Ecosystem - Integrates the npm ecosystem and CommonJS module system for sharing and reusing JavaScript packages.
• Binary Data Buffers - Creates and manipulates raw binary data in memory with encoding conversions and slicing.
• Streaming Data Pipelines - Provides a built-in stream pipeline API for processing large files chunk by chunk without memory overload.
• Cross-Platform CLI Builders - Provides built-in modules for argument parsing, process management, and cross-platform CLI development.
• Cross-Platform CLI Builders - Provides built-in modules for argument parsing, process management, and cross-platform CLI development.
• Interactive REPLs - Provides an interactive shell that evaluates JavaScript expressions and prints results in real time.
• Read-Eval-Print Loops - Ships an interactive REPL for executing JavaScript statements and inspecting results immediately.
• JavaScript Sandboxed Runtimes - Provides a built-in VM module for executing JavaScript in isolated contexts with controlled globals.
• Cross-Platform Application Development - Enables building applications that run consistently across Windows, macOS, and Linux from a single codebase.
• HTTP Servers - Ships a built-in HTTP server module for handling incoming requests and sending responses.
• Event-Driven Server Frameworks - Provides an event-driven, non-blocking I/O architecture for building scalable real-time applications.
• libuv Abstractions - Ships the libuv library as the cross-platform abstraction layer for async I/O and event loop operations.
• Process Lifecycle Management - Provides process lifecycle management with exit codes, signal handling, and environment variable control.
• ECMAScript Module Support - Supports loading ECMAScript modules with import statements, top-level await, and static analysis.
• File Read and Write Operations - Provides synchronous and asynchronous APIs for reading, writing, and managing files and directories.
• CommonJS Resolvers - Implements the CommonJS module resolution algorithm for synchronous module loading with caching.
• Module and Package Management - Organizes code into reusable packages with entry points and dependency declarations for distribution via npm.
• V8 Engine Integrations - Embeds the Google V8 engine to execute JavaScript with just-in-time compilation and memory management.
• Parallel Computation Thread Pools - Provides a worker_threads module for running JavaScript in parallel threads to perform CPU-intensive tasks.
• SSL/TLS Connection Security - Ships built-in TLS/SSL modules for establishing encrypted connections between clients and servers.
• Stream Pipelining - Implements a composable stream pipelining architecture with automatic backpressure handling.
• Child Process Execution - Ships a child_process module for spawning and managing external system processes with output capture.
• Stream Piping - Implements stream piping for chaining readable and writable streams with backpressure handling.
• Worker Thread Patterns - Ships a built-in worker_threads module for running JavaScript in parallel threads with shared memory.
• Event-Driven I/O - Provides an event-driven, non-blocking I/O architecture for handling high-concurrency network connections.
• HTTP Request Handling - Handles incoming HTTP connections, parses requests, and sends responses for building web servers.
• Event Emitters - Ships a built-in EventEmitter class for implementing publish-subscribe patterns with named events.
• Web Servers - Provides built-in HTTP and HTTPS modules for building web servers that handle requests and send responses.
• HTTPS Servers - Provides a built-in HTTPS module for creating secure web servers with TLS encryption.
• Command Line Parsing - Includes a built-in module for parsing command-line arguments and flags passed to scripts.
• Async Iterable Streams - Supports processing streaming data with async iterators for chunk-by-chunk consumption without full buffering.
• Web Streams API - Implements the standard Web Streams API for interoperable data streaming across environments.
• Zlib Compression Utilities - Compresses and decompresses data using gzip, deflate, and brotli algorithms via the built-in zlib module.
• SQLite Databases - Executes SQL queries against an embedded SQLite database for local data storage.
• Command Line Input Utilities - Provides a readline module for reading user input line by line from terminal streams.
• Breakpoint Debugging - Supports attaching a debugger to inspect variables, set breakpoints, and step through execution.
• Runtime Event Tracers - Ships a built-in trace event recorder for profiling V8 engine and runtime internals.
• Timed Event Scheduling - Provides setTimeout and setInterval for scheduling callbacks after delays or at regular intervals.
• Process Inspectors - Provides a built-in inspector for attaching to running Node.js processes for profiling and debugging.
• Domain Name Systems - Provides DNS resolution APIs for translating hostnames to IP addresses and performing reverse lookups.
• HTTP/2 Support - Implements HTTP/2 protocol support with multiplexed streams, server push, and stream prioritization.
• TCP Client Connections - Provides low-level TCP socket APIs for establishing client connections and bidirectional communication.
• Terminal Capability Queries - Ships a built-in module for querying terminal capabilities like cursor positioning and color support.
• URI Construction and Parsing - Provides built-in URL parsing and construction utilities following the standard specification.
• Path Manipulations - Parses, joins, and resolves file system paths across different operating systems.
• Binary String Decoders - Converts Buffer data to and from string encodings like UTF-8 and Base64.
• TypeScript Transpilers - Includes built-in support for transpiling TypeScript source files into JavaScript before execution.
• Data Compression and Decompression - Ships a zlib module for compressing and decompressing data using gzip, deflate, and brotli algorithms.
• Node.js Native Addons - Provides a stable C API for building native addons that remain compatible across Node.js versions.
• Function Utilities - Provides a built-in util module with helpers for type checking, object inspection, and formatting.
• File Hashing Utilities - Opens a file from disk and computes its cryptographic hash for integrity checks or data comparison.
• General Data Encryption - Ships a crypto module for applying cryptographic algorithms including hashing, signing, and encryption.
• Process Restriction Policies - Ships a permission model for restricting process access to file system paths and network resources.
• Web Crypto API Integrations - Implements the Web Crypto API standard for performing cryptographic operations in a runtime environment.
• Single-File Executables - Bundles a Node.js application and its dependencies into a standalone executable file.
• Path Normalizers - Provides a path module for parsing, joining, and normalizing file system paths across operating systems.
• JavaScript Worker Threads - Provides worker threads for parallel JavaScript execution with isolated V8 instances and shared memory.
• Diagnostic Channels - Subscribes to named diagnostic channels to observe internal runtime events without modifying code.
• Diagnostic Reports - Ships a built-in diagnostic report generator that captures stack traces and resource usage snapshots.
• V8 Internal State Monitoring - Interacts with the V8 JavaScript engine for memory statistics and serialization.
• Process Clustering - Distributes incoming connections across multiple worker processes to utilize multi-core systems.
• System Information Retrievers - Provides an OS module for retrieving system details like CPU architecture, memory, and network interfaces.
• Async Context Trackers - Provides AsyncLocalStorage for tracking shared context across asynchronous operations without explicit threading.
• Automated Test Execution - Ships a built-in test runner that executes test suites and reports pass/fail results programmatically.
• Automated Test Suites - Includes a built-in test runner for defining and executing test suites with assertions and hooks.
• Test Utilities & Assertions - Includes a built-in assertion module for comparing actual outcomes against expected values in tests.
• Performance Measurement - Ships a high-resolution performance measurement API for timing and resource tracking.
• Manual Test Code Writing - Runs automated test suites to verify code behavior and catch regressions during development.
• Internationalized Date Formatting - Formats dates, numbers, and strings according to locale-specific conventions for internationalized output.

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