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This feature is well established and works across many devices and browser versions. Its been available across browsers since 2021 12.
* Some parts of this feature may have varying levels of support.
SharedArrayBuffer , . ArrayBuffer , . ArrayBuffer , SharedArrayBuffer .
// Create a SharedArrayBuffer with a size in bytes
const buffer = new SharedArrayBuffer(8);
console.log(buffer.byteLength);
// Expected output: 8
new SharedArrayBuffer(length);
lengtharray buffer .
SharedArrayBuffer . 0 .
SharedArrayBuffer agent(agent ) agent , postMessage structured cloning .
Structured clone SharedArrayBuffer SharedArrayBuffer TypedArray . , SharedArrayBuffer (receiver) agent(, ArrayBuffer) SharedArrayBuffer . , SharedArrayBuffer , , agent agent .
var sab = new SharedArrayBuffer(1024);
worker.postMessage(sab);
. (CPU, OS, ) . , atomic .
SharedArrayBuffer APIWebGLRenderingContext.bufferData()WebGLRenderingContext.bufferSubData()WebGL2RenderingContext.getBufferSubData()new SharedArrayBuffer , new . SharedArrayBuffer new , TypeError .
var sab = SharedArrayBuffer(1024);
// TypeError: calling a builtin SharedArrayBuffer constructor
// without new is forbidden
var sab = new SharedArrayBuffer(1024);
SharedArrayBuffer.length 1 SharedArrayBuffer length .
SharedArrayBuffer SharedArrayBuffer .
SharedArrayBuffer prototype SharedArrayBuffer SharedArrayBuffer .
SharedArrayBuffer.prototype.slice(begin, end)Returns a new SharedArrayBuffer whose contents are a copy of this SharedArrayBuffer's bytes from begin, inclusive, up to end, exclusive. begin end .
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-sharedarraybuffer-objects |
AtomicsArrayBufferThis page was last modified on 2026 7 15 by MDN contributors.
SharedArrayBufferObject/FunctionObject.prototype.__defineGetter__()Object.prototype.__defineSetter__()Object.prototype.__lookupGetter__()Object.prototype.__lookupSetter__()Object.prototype.hasOwnProperty()Object.prototype.isPrototypeOf()Object.prototype.propertyIsEnumerable()Object.prototype.toLocaleString()Object.prototype.toString()Object.prototype.valueOf()Your blueprint for a better internet.
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