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---
title: Function.displayName
slug: Web/JavaScript/Reference/Global_Objects/Function/displayName
translation_of: Web/JavaScript/Reference/Global_Objects/Function/displayName
---
<div>{{JSRef}} {{non-standard_header}}</div>
<p><strong><code>function.displayName</code></strong> 属性获取函数的显示名称</p>
<h2 id="Description_描述">Description 描述</h2>
<p>当一个函数的 <code>displayName</code> 属性被定义，这个函数的 <code>displayName</code> 属性将返回显示名称。</p>
<pre class="brush: js">function doSomething() {}
console.log(doSomething.displayName); // "undefined"
var popup = function(content) { console.log(content); };
popup.displayName = 'Show Popup';
console.log(popup.displayName); // "Show Popup"
</pre>
<p>可以在函数表达式重定义函数的显示名称{{jsxref("Functions", "function expression", "", 1)}}:</p>
<pre class="brush: js">var object = {
someMethod: function() {}
};
object.someMethod.displayName = 'someMethod';
console.log(object.someMethod.displayName); // logs "someMethod"
try { someMethod } catch(e) { console.log(e); }
// ReferenceError: someMethod is not defined
</pre>
<p>可以动态修改函数的显示名称：</p>
<pre class="brush: js">var object = {
// anonymous
someMethod: function(value) {
arguments.callee.displayName = 'someMethod (' + value + ')';
}
};
console.log(object.someMethod.displayName); // "undefined"
object.someMethod('123')
console.log(object.someMethod.displayName); // "someMethod (123)"
</pre>
<h2 id="Examples_例子">Examples 例子</h2>
<p>这个显示名称通常在控制台和配置文件中，用它来提醒对它背后的真实函数名 {{jsxref("Function.name", "func.name")}}的引用。例如：</p>
<p>通过如下的举例，显示的名称应该显示像"function My Function()"</p>
<pre class="brush: js">var a = function() {};
a.displayName = 'My Function';
a; // "function My Function()"</pre>
<h2 id="Specifications_规范">Specifications 规范</h2>
<p>不属于任何规范</p>
<h2 id="Browser_compatibility_浏览器兼容性">Browser compatibility 浏览器兼容性</h2>
<p>如果你愿意贡献数据，请访问<a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a>并同时给我们发送推送请求。</p>
<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>{{CompatGeckoDesktop(13)}}</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>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
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