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+---
+title: Symbol.prototype.description
+slug: Web/JavaScript/Reference/Global_Objects/Symbol/description
+tags:
+  - JavaScript
+  - Property
+  - Prototype
+  - Symbol
+translation_of: Web/JavaScript/Reference/Global_Objects/Symbol/description
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>description</strong></code> 是一个只读属性，它会返回 {{jsxref("Symbol")}} 对象的可选描述的字符串。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/symbol-prototype-description.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">Symbol('myDescription').description;
+Symbol.iterator.description;
+Symbol.for('foo').description;
+</pre>
+
+<h2 id="描述">描述</h2>
+
+<p>{{jsxref("Symbol")}} 对象可以通过一个可选的描述创建，可用于调试，但不能用于访问 symbol 本身。<code>Symbol.prototype.description</code> 属性可以用于读取该描述。与 <code>Symbol.prototype.toString()</code> 不同的是它不会包含 "<code>Symbol()</code>" 的字符串。具体请看实例。</p>
+
+<h2 id="实例">实例</h2>
+
+<pre class="brush: js">Symbol('desc').toString();   // "Symbol(desc)"
+Symbol('desc').description;  // "desc"
+Symbol('').description;      // ""
+Symbol().description;        // undefined
+
+// well-known symbols
+Symbol.iterator.toString();  // "Symbol(Symbol.iterator)"
+Symbol.iterator.description; // "Symbol.iterator"
+
+// global symbols
+Symbol.for('foo').toString();  // "Symbol(foo)"
+Symbol.for('foo').description; // "foo"
+
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+  </tr>
+  <tr>
+   <td><code><a href="https://tc39.github.io/proposal-Symbol-description/#sec-symbol.prototype.description">get Symbol.prototype.description</a></code> proposal</td>
+   <td>Stage 3</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Symbol.description")}}</p>
+
+<h2 id="另请参阅">另请参阅</h2>
+
+<ul>
+ <li>{{jsxref("Symbol.prototype.toString()")}}</li>
+ <li>Polyfill: <a href="https://npmjs.com/symbol.prototype.description">https://npmjs.com/symbol.prototype.description</a></li>
+</ul>