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Title: SharedArrayBuffer - JavaScript | MDN

Open Graph Title: SharedArrayBuffer - JavaScript | MDN

Description: The SharedArrayBuffer object is used to represent a generic raw binary data buffer, similar to the ArrayBuffer object, but in a way that they can be used to create views on shared memory. A SharedArrayBuffer is not a Transferable Object, unlike an ArrayBuffer which is transferable.

Open Graph Description: The SharedArrayBuffer object is used to represent a generic raw binary data buffer, similar to the ArrayBuffer object, but in a way that they can be used to create views on shared memory. A SharedArrayBuffer is not a Transferable Object, unlike an ArrayBuffer which is transferable.

Opengraph URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer

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Standard built-in objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
SharedArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer
https://github.com/orgs/mdn/discussions/739
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Learn more https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility
See full compatibility https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#browser_compatibility
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ArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
Transferable Objecthttps://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Transferable_objects
Descriptionhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#description
Constructorhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#constructor
Static propertieshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#static_properties
Instance propertieshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#instance_properties
Instance methodshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#instance_methods
Exampleshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#examples
Specificationshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#specifications
Browser compatibilityhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#browser_compatibility
See alsohttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#see_also
Descriptionhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#description
postMessagehttps://developer.mozilla.org/en-US/docs/Web/API/Worker/postMessage
structured cloninghttps://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
ArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
atomichttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Atomics
WebGLRenderingContext.bufferData()https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/bufferData
WebGLRenderingContext.bufferSubData()https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/bufferSubData
WebGL2RenderingContext.getBufferSubData()https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/getBufferSubData
Security requirementshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#security_requirements
disabled at the start of 2018https://blog.mozilla.org/security/2018/01/03/mitigations-landing-new-class-timing-attack/
Spectrehttps://en.wikipedia.org/wiki/Spectre_(security_vulnerability)
secure contexthttps://developer.mozilla.org/en-US/docs/Web/Security/Defenses/Secure_Contexts
cross-origin isolatedhttps://developer.mozilla.org/en-US/docs/Web/API/Window/crossOriginIsolated
Window.crossOriginIsolatedhttps://developer.mozilla.org/en-US/docs/Web/API/Window/crossOriginIsolated
WorkerGlobalScope.crossOriginIsolatedhttps://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/crossOriginIsolated
API availabilityhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#api_availability
WebAssembly.Memoryhttps://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory
WebAssembly shared memoryhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#webassembly_shared_memory
WebAssembly.Memoryhttps://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory
sharedhttps://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory/Memory#shared
bufferhttps://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory/buffer
atomichttps://github.com/WebAssembly/threads/blob/main/proposals/threads/Overview.md#atomic-memory-accesses
Growing SharedArrayBuffershttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#growing_sharedarraybuffers
SharedArrayBuffer()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/SharedArrayBuffer
growablehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/growable
maxByteLengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/maxByteLength
grow()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow
WebAssembly.Memory.prototype.grow()https://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory/grow
Constructorhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#constructor
SharedArrayBuffer()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/SharedArrayBuffer
Static propertieshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#static_properties
SharedArrayBuffer[Symbol.species]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/Symbol.species
Instance propertieshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#instance_properties
SharedArrayBuffer.prototype.byteLengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/byteLength
SharedArrayBuffer.prototype.grow()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow
SharedArrayBuffer.prototype.constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor
SharedArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/SharedArrayBuffer
SharedArrayBuffer.prototype.growablehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/growable
SharedArrayBuffer.prototype.maxByteLengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/maxByteLength
SharedArrayBuffer.prototype[Symbol.toStringTag]https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#sharedarraybuffer.prototypesymbol.tostringtag
[Symbol.toStringTag]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toStringTag
Object.prototype.toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
Instance methodshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#instance_methods
SharedArrayBuffer.prototype.grow()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow
SharedArrayBuffer.prototype.slice()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/slice
Exampleshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#examples
Creating a new SharedArrayBufferhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#creating_a_new_sharedarraybuffer
Slicing the SharedArrayBufferhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#slicing_the_sharedarraybuffer
Using it in a WebGL bufferhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#using_it_in_a_webgl_buffer
Specificationshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#specifications
ECMAScript® 2026 Language Specification# sec-sharedarraybuffer-objectshttps://tc39.es/ecma262/multipage/structured-data.html#sec-sharedarraybuffer-objects
Browser compatibilityhttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#browser_compatibility
See alsohttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#see_also
Atomicshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Atomics
ArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
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Window.crossOriginIsolatedhttps://developer.mozilla.org/en-US/docs/Web/API/Window/crossOriginIsolated
WorkerGlobalScope.crossOriginIsolatedhttps://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/crossOriginIsolated
SharedArrayBuffer updates in Android Chrome 88 and Desktop Chrome 92https://developer.chrome.com/blog/enabling-shared-array-buffer/
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Standard built-in objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
SharedArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer
SharedArrayBuffer()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/SharedArrayBuffer
[Symbol.species]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/Symbol.species
grow()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow
slice()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/slice
byteLengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/byteLength
growablehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/growable
maxByteLengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/maxByteLength
Object/Functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply
bind()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
call()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call
toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/toString
[Symbol.hasInstance]()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/Symbol.hasInstance
displayNamehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/displayName
lengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/length
namehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name
prototypehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/prototype
argumentshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/arguments
callerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/caller
__defineGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
__defineSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineSetter__
__lookupGetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupGetter__
__lookupSetter__()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupSetter__
hasOwnProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty
isPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf
propertyIsEnumerable()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable
toLocaleString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString
toString()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
valueOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf
__proto__https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor
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