ArrayBuffer.isView() - JavaScript 编辑

ArrayBuffer.isView() 方法用来判断传入的参数值是否是一种 ArrayBuffer 视图（view），比如类型化数组对象（typed array objects）或者数据视图（ DataView）。

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语法

ArrayBuffer.isView(value)

参数

value

被检测的值。

返回值

true

如果提供的参数是一种 ArrayBuffer 视图；

false

提供的参数不是一种 ArrayBuffer 视图类型；

示例

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

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

规范

Specification	Status	Comment
Typed Array Specification	Obsolete	Superseded by ECMAScript 6.
ECMAScript 2015 (6th Edition, ECMA-262) ArrayBuffer.isView	Standard	Initial definition in an ECMA standard.

浏览器兼容性

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另见

• JavaScript typed arrays