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+---
+title: String.prototype.toSource()
+slug: Web/JavaScript/Reference/Global_Objects/String/toSource
+translation_of: Web/JavaScript/Reference/Global_Objects/String/toSource
+---
+<div>{{JSRef}} {{non-standard_header}}</div>
+
+<p><strong><code>toSource()</code></strong> 方法返回一个代表对象的源代码。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code>String.toSource()
+<var>str</var>.toSource()
+</code></pre>
+
+<h2 id="描述">描述</h2>
+
+<p><code>toSource()</code> 方法返回以下值：</p>
+
+<p>对于内建对象 {{jsxref("String")}} , <code>toSource()返回以下值说明源码不可用：</code></p>
+
+<pre class="brush: js">function String() {
+    [native code]
+}
+</pre>
+
+<p>对于实例{{jsxref("String")}} 或者字符串, <code>toSource()</code> 返回一个字符串表示源码.</p>
+
+<p>这种方法通常在内部被JavaScript调用，而不是明确的代码。.</p>
+
+<h2 id="规范">规范</h2>
+
+<p>不属于任何标准. 在 JavaScript 1.3实现了.</p>
+
+<h2 id="浏览器适配">浏览器适配</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<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="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Object.prototype.toSource()")}}</li>
+</ul>