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+---
+title: Number.prototype.toSource()
+slug: Web/JavaScript/Reference/Global_Objects/Number/toSource
+translation_of: Web/JavaScript/Reference/Global_Objects/Number/toSource
+---
+<div>
+ {{JSRef("Global_Objects", "Number")}} {{ Non-standard_header() }}</div>
+<h2 id="Summary" name="Summary">概述</h2>
+<p><code><strong>toSource()</strong></code> 方法返回该对象源码的字符串表示。</p>
+<h2 id="Syntax" name="Syntax">语法</h2>
+<pre class="syntaxbox">numObj.toSource();
+Number.toSource();
+</pre>
+<h3 id="Parameters" name="Parameters">参数</h3>
+<p>无</p>
+<h2 id="Description" name="Description">描述</h2>
+<p><code>toSource()</code> 方法返回下列值：</p>
+
+<ul>
+ <li>对于内置 <code>Number</code> 对象， <code>toSource()</code> 返回下面字符串，用来指明源码是不可见的。</li>
+</ul>
+<pre class="eval">function Number() { [native code] }</pre>
+<ul>
+ <li>对于 <code>Number</code> 对象的实例，<code>toSource()</code> 返回一个表示源码的字符串。</li>
+</ul>
+<p>该方法通常被 JavaScript 内部调用，而不是在代码中显示调用。</p>
+<h2 id="规范">规范</h2>
+<p>不是任何标准的一部分。在 JavaScript 1.3 被实现。</p>
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+<p>{{ CompatibilityTable() }}</p>
+<div id="compat-desktop">
+ <table class="compat-table">
+  <tbody>
+   <tr>
+    <th>Feature</th>
+    <th>Chrome</th>
+    <th>Firefox (Gecko)</th>
+    <th>Internet Explorer</th>
+    <th>Opera</th>
+    <th>Safari</th>
+   </tr>
+   <tr>
+    <td>Basic support</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+   </tr>
+  </tbody>
+ </table>
+</div>
+<div id="compat-mobile">
+ <table class="compat-table">
+  <tbody>
+   <tr>
+    <th>Feature</th>
+    <th>Android</th>
+    <th>Chrome for Android</th>
+    <th>Firefox Mobile (Gecko)</th>
+    <th>IE Mobile</th>
+    <th>Opera Mobile</th>
+    <th>Safari Mobile</th>
+   </tr>
+   <tr>
+    <td>Basic support</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatVersionUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+    <td>{{ CompatUnknown() }}</td>
+   </tr>
+  </tbody>
+ </table>
+</div>
+<h2 id="See_Also" name="See_Also">相关链接</h2>
+<ul>
+ <li>{{jsxref("Object.prototype.toSource()")}}</li>
+</ul>