The byteOffset accessor property represents the offset (in bytes) of this view from the start of its ArrayBuffer or SharedArrayBuffer.


The byteOffset property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when an DataView is constructed and cannot be changed.


Using the byteOffset property

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.byteOffset; // 0 (no offset specified)

var dataview2 = new DataView(buffer, 3);
dataview2.byteOffset; // 3 (as specified when constructing the DataView)


ECMAScript (ECMA-262)
The definition of 'DataView.prototype.byteOffset' in that specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
byteOffsetChrome Full support 9Edge Full support 12Firefox Full support 15IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support 4Chrome Android Full support 18Firefox Android Full support 15Opera Android Full support 12.1Safari iOS Full support 4.2Samsung Internet Android Full support 1.0nodejs Full support 0.10


Full support  
Full support

See also