ArrayBuffer.isView() - JavaScript 编辑

The ArrayBuffer.isView() method determines whether the passed value is one of the ArrayBuffer views, such as typed array objects or a DataView.

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.

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.

Syntax

ArrayBuffer.isView(value)

Parameters

value

The value to be checked.

Return value

true if the given argument is one of the ArrayBuffer views; otherwise, false.

Examples

Using isView

ArrayBuffer.isView();                    // false
ArrayBuffer.isView([]);                  // false
ArrayBuffer.isView({});                  // false
ArrayBuffer.isView(null);                // false
ArrayBuffer.isView(undefined);           // false
ArrayBuffer.isView(new ArrayBuffer(10)); // false

ArrayBuffer.isView(new Uint8Array());    // true
ArrayBuffer.isView(new Float32Array());  // true
ArrayBuffer.isView(new Int8Array(10).subarray(0, 3)); // true

const buffer = new ArrayBuffer(2);
const dv = new DataView(buffer);
ArrayBuffer.isView(dv); // true

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'ArrayBuffer.isView' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

• JavaScript typed arrays