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Typed Array Specification | Obsolete | Superseded by ECMAScript 6.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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