This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
byteLength accessor property represents the length of an
SharedArrayBuffer in bytes.
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.
var sab = new SharedArrayBuffer(1024); sab.byteLength; // 1024
|ECMAScript Shared Memory and Atomics
The definition of 'SharedArrayBuffer.prototype.byteLength' in that specification.
|46 (46) 
|Chrome for Android
|Firefox Mobile (Gecko)
|46.0 (46) 
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