The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
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 an
DataView is constructed and cannot be changed. If the
DataView is not specifying an offset or a
byteLength of the referenced
SharedArrayBuffer will be returned.
var buffer = new ArrayBuffer(8); var dataview = new DataView(buffer); dataview.byteLength; // 8 (matches the byteLength of the buffer) var dataview2 = new DataView(buffer, 1, 5); dataview2.byteLength; // 5 (as specified when constructing the DataView) var dataview3 = new DataView(buffer, 2); dataview3.byteLength; // 6 (due to the offset of the constructed DataView)
|ECMAScript Latest Draft (ECMA-262)
The definition of 'DataView.prototype.byteLength' in that specification.
|Chrome Full support 9||Edge Full support 12||Firefox Full support 15||IE Full support 10||Opera Full support 12.1||Safari Full support 5.1||WebView Android Full support 4||Chrome Android Full support 18||Firefox Android Full support 15||Opera Android Full support 12.1||Safari iOS Full support 4.2||Samsung Internet Android Full support Yes||nodejs Full support Yes|
- Full support
- Full support