非标准
该特性是非标准的，请尽量不要在生产环境中使用它！

`function.displayName` 属性获取函数的显示名称

## Description 描述

当一个函数的 `displayName` 属性被定义，这个函数的 `displayName` 属性将返回显示名称。

    function doSomething() {}

    console.log(doSomething.displayName); // "undefined"

    var popup = function(content) { console.log(content); };

    popup.displayName = 'Show Popup';

    console.log(popup.displayName); // "Show Popup"

可以在函数表达式重定义函数的显示名称function expression:

    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

可以动态修改函数的显示名称：

    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)"

## Examples 例子

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 `func.name`的引用。例如：

通过如下的举例，显示的名称应该显示像"function My Function()"

    var a = function() {};
    a.displayName = 'My Function';

    a; // "function My Function()"

## Specifications 规范

不属于任何规范

## Browser compatibility 浏览器兼容性

如果你愿意贡献数据，请访问https://github.com/mdn/browser-compat-data并同时给我们发送推送请求。

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

- Desktop
- Mobile

Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari
--- | --- | --- | --- | --- | ---
Basic support | ? | 13 (13) | ? | ? | ?

Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile
--- | --- | --- | --- | --- | --- | ---
Basic support | ? | ? | ? | ? | ? | ?