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WebSocket

API Documentation

About this documentation Usage and example Assert Async hooks Asynchronous context tracking Buffer C++ addons C++ embedder API Child process Cluster Command-line API Console Crypto Debugger Deprecated APIs Diagnostic report Diagnostics Channel DNS Domain Environment Variables Errors Events FFI File system Global objects AbortController AbortSignal atob Blob BroadcastChannel btoa Buffer ByteLengthQueuingStrategy clearImmediate clearInterval clearTimeout CloseEvent CompressionStream CountQueuingStrategy Crypto CryptoKey CustomEvent DecompressionStream DOMException Event EventSource EventTarget File FormData Headers MessageChannel MessageEvent MessagePort Navigator navigator PerformanceEntry PerformanceMark PerformanceMeasure PerformanceObserver PerformanceObserverEntryList PerformanceResourceTiming queueMicrotask QuotaExceededError ReadableByteStreamController ReadableStream ReadableStreamBYOBReader ReadableStreamBYOBRequest ReadableStreamDefaultController ReadableStreamDefaultReader Request require Response setImmediate setInterval setTimeout Storage structuredClone SubtleCrypto TextDecoder TextDecoderStream TextEncoder TextEncoderStream TransformStream TransformStreamDefaultController URL URLPattern URLSearchParams WebAssembly WebSocket WritableStream WritableStreamDefaultController WritableStreamDefaultWriter HTTP HTTP/2 HTTPS Inspector Internationalization support Iterable Streams Modules: node:module API Modules: CommonJS modules Modules: ECMAScript modules Modules: Packages Modules: TypeScript Net Node-API OS Path Performance measurement APIs Permissions Process Punycode Query string Readline REPL Single executable applications SQLite Stream String decoder Test runner Timers TLS (SSL)Trace events TTY UDP/datagram sockets URL Util V8 Virtual File System VM (executing JavaScript)Web Crypto API Web Streams API WebAssembly System Interface (WASI)Worker threads Zlib

API Documentation

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WebSocket

History

Added in: v21.0.0, v20.10.0

v21.0.0, v20.10.0

Introduced in: v0.10.0

v0.10.0

No longer experimental.

No longer behind --experimental-websocket CLI flag.

A browser-compatible implementation of WebSocket. Disable this API with the --no-experimental-websocket CLI flag.

PreviousWebAssembly NextWritableStream

Added In

v21.0.0v20.10.0

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