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 Latest Draft (ECMA-262)
The definition of 'SharedArrayBuffer.prototype.byteLength' in that specification.
|Draft||Initial definition in ES2017.|
|Feature||Chrome||Edge||Firefox (Gecko)||Internet Explorer||Opera||Safari|
|Basic support||No support||No support||55 (55) ||No support||No support||No support|
|Feature||Android||Chrome for Android||Firefox Mobile (Gecko)||IE Mobile||Opera Mobile||Safari Mobile|
|Basic support||No support||No support||55.0 (55) ||No support||No support||No support|
 Enabled by default in Firefox 55. In Firefox version 46 until version 54, this feature is disabled by a preference setting (in about:config, set