The byteLength
accessor property represents the length of an SharedArrayBuffer
in bytes.
SharedArrayBuffer.prototype.byteLength
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Description
The byteLength
property is an accessor property whose set accessor function is undefined
, meaning that you can only read this property. The value is established when the shared array is constructed and cannot be changed.
Examples
Using byteLength
var sab = new SharedArrayBuffer(1024); sab.byteLength; // 1024
Specifications
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
byteLength |
68
60-63
Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of
speculative side-channel attacks. This was a temporary removal while mitigations were put in place.
|
79
16-17
Support was removed to mitigate
speculative execution side-channel attacks (Windows blog).
|
79
57
Support was disabled by default to mitigate
speculative execution side-channel attacks (Mozilla Security Blog).
55-57
46-55
|
No
|
No
|
15.2
SharedArrayBuffer is gated behind COOP/COEP. For more detail, read
Making your website "cross-origin isolated" using COOP and COEP.
10.1-11
|
60-63
Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of
speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place.
|
89
SharedArrayBuffer is gated behind COOP/COEP. For more detail, read
Making your website "cross-origin isolated" using COOP and COEP.
60-63
Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of
speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place.
|
79
57
Support was disabled by default to mitigate
speculative execution side-channel attacks (Mozilla Security Blog).
55-57
46-55
|
No
|
15.2
SharedArrayBuffer is gated behind COOP/COEP. For more detail, read
Making your website "cross-origin isolated" using COOP and COEP.
10.3-11
|
15.0
SharedArrayBuffer is gated behind COOP/COEP. For more detail, read
Making your website "cross-origin isolated" using COOP and COEP.
|
1.0
|
8.10.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/byteLength