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+---
+title: DataView.prototype.setUint8()
+slug: Web/JavaScript/Reference/Global_Objects/DataView/setUint8
+translation_of: Web/JavaScript/Reference/Global_Objects/DataView/setUint8
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>setUint8()</code></strong><code>从</code><a href="https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/DataView" title="DataView 视图提供了一种用于向 ArrayBuffer 读写数据的底层接口。"><code>DataView</code></a>起始位置以byte为计数的指定偏移量(byteOffset)处储存一个8-bit数(无符号字节).</p>
+
+<div>{{EmbedInteractiveExample("pages/js/dataview-setuint8.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var>dataview</var>.setUint8(byteOffset, value)</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>byteOffset</dt>
+ <dd>偏移量，从头开始计算，单位为字节</dd>
+ <dt>value</dt>
+ <dd>设置的数值</dd>
+</dl>
+
+<h3 id="返回">返回</h3>
+
+<p>{{jsxref("undefined")}}.</p>
+
+<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="例子">例子</h2>
+
+<pre class="brush:js">var buffer = new ArrayBuffer(8);
+var dataview = new DataView(buffer);
+dataview.setUint8(1, 3);
+dataview.getUint8(1); // 3
+</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Superseded by ECMAScript 6.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-dataview.prototype.setuint8', 'DataView.prototype.setUint8')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-dataview.prototype.setuint8', 'DataView.prototype.setUint8')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器支持">浏览器支持</h2>
+
+
+
+<p>{{Compat("javascript.builtins.DataView.setUint8")}}</p>
+
+<h2 id="相关内容">相关内容</h2>
+
+<ul>
+ <li>{{jsxref("DataView")}}</li>
+ <li>{{jsxref("ArrayBuffer")}}</li>
+</ul>