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+---
+title: DataView.prototype.getUint8()
+slug: Web/JavaScript/Reference/Global_Objects/DataView/getUint8
+tags:
+  - 类型化
+  - 类型化数组
+translation_of: Web/JavaScript/Reference/Global_Objects/DataView/getUint8
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>getUint8()</code></strong><code>方法</code><code>从</code>{{jsxref("DataView")}}相对于起始位置偏移 n 个字节处开始，获取一个无符号的8-bit整数(一个字节).</p>
+
+<div>{{EmbedInteractiveExample("pages/js/dataview-getuint8.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var>dataview</var>.getUint8(byteOffset)</pre>
+
+<h2 id="参数">参数</h2>
+
+<dl>
+ <dt>byteOffset</dt>
+ <dd>偏移量, 单位为字节, 从头开始计算.</dd>
+</dl>
+
+<h3 id="抛出错误">抛出错误</h3>
+
+<dl>
+ <dt>{{jsxref("RangeError")}}</dt>
+ <dd>如果byteOffset超出了视图能储存的值，就会抛出错误.</dd>
+</dl>
+
+<h2 id="描述">描述</h2>
+
+<dl>
+ <dd> 没有对齐约束; 多字节值可以从任何偏移量获取.</dd>
+</dl>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush:js">var buffer = new ArrayBuffer(8);
+var dataview = new DataView(buffer);
+dataview.getUint8(1); // 0
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">说明</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Superseded by ECMAScript 6.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-dataview.prototype.getuint8', 'DataView.prototype.getUint8')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-dataview.prototype.getuint8', 'DataView.prototype.getUint8')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("javascript.builtins.DataView.getUint8")}}</p>
+
+<h2 id="相关内容">相关内容</h2>
+
+<ul>
+ <li>{{jsxref("DataView")}}</li>
+ <li>{{jsxref("ArrayBuffer")}}</li>
+</ul>