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+---
+title: DataView.prototype.setFloat32()
+slug: Web/JavaScript/Reference/Global_Objects/DataView/setFloat32
+translation_of: Web/JavaScript/Reference/Global_Objects/DataView/setFloat32
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>setFloat32()</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32-bit数(浮点型).</p>
+
+<p>{{EmbedInteractiveExample("pages/js/dataview-setfloat32.html")}}</p>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var>dataview</var>.setFloat32(byteOffset, value [, littleEndian])</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>
+ <dt>littleEndian</dt>
+ <dd>{{optional_inline}} Indicates whether the 32-bit float is stored in {{Glossary("Endianness", "little- or big-endian")}} format. If false or undefined, a big-endian value is written.</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.setFloat32(1, 3);
+dataview.getFloat32(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Superseded by ECMAScript 6.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.setfloat32', 'DataView.prototype.setFloat32')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-dataview.prototype.setfloat32', 'DataView.prototype.setFloat32')}}</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.setFloat32")}}</p>
+
+<h2 id="相关内容">相关内容</h2>
+
+<ul>
+ <li>{{jsxref("DataView")}}</li>
+ <li>{{jsxref("ArrayBuffer")}}</li>
+</ul>