---
title: ArrayBuffer.isView()
slug: Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView
tags:
  - 类型数组
  - 缓冲区
translation_of: Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView
---
<div>{{JSRef}}</div>

<p><code><strong>ArrayBuffer.isView()</strong></code> 方法用来判断传入的参数值是否是一种 <code>ArrayBuffer</code> 视图（view），比如类型化数组对象（<a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray">typed array objects</a>）或者数据视图（ {{jsxref("DataView")}}）。</p>

<div>{{EmbedInteractiveExample("pages/js/arraybuffer-isview.html")}}</div>



<h2 id="语法">语法</h2>

<pre class="brush: js"><code>ArrayBuffer.isView(<var>value</var>)</code></pre>

<h3 id="参数">参数</h3>

<dl>
 <dt><code>value</code></dt>
 <dd>被检测的值。</dd>
</dl>

<h3 id="返回值">返回值</h3>

<dl>
 <dt><code>true</code></dt>
 <dd>如果提供的参数是一种 {{jsxref("ArrayBuffer")}} 视图；</dd>
 <dt><code>false</code></dt>
 <dd>提供的参数不是一种 {{jsxref("ArrayBuffer")}} 视图类型；</dd>
</dl>

<h2 id="示例">示例</h2>

<pre class="brush: js">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
</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('Typed Array')}}</td>
   <td>{{Spec2('Typed Array')}}</td>
   <td>Superseded by ECMAScript 6.</td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-arraybuffer.isview', 'ArrayBuffer.isView')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td>Initial definition in an ECMA standard.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>



<p>{{Compat("javascript.builtins.ArrayBuffer.isView")}}</p>

<h2 id="另见">另见</h2>

<ul>
 <li><a href="/en-US/docs/Web/JavaScript/Typed_arrays" title="en/JavaScript typed arrays">JavaScript typed arrays</a></li>
</ul>