Web/JavaScript/Reference/Global objects/Function/displayName

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The function.displayName property returns the display name of the function.

Examples

Setting a displayName

It is usually preferred by consoles and profilers over func.name to display the name of a function.

By entering the following in a console, it should display as something like "function My Function()":

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

a; // "function My Function()"

When defined, the displayName property returns the display name of a function:

function doSomething() {}

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

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

popup.displayName = 'Show Popup';

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

Defining a displayName in function expressions

You can define a function with a display name in a 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

Changing displayName dynamically

You can dynamically change the displayName of a function:

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)"

Specifications

Not part of any standard.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`displayName` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 13	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 14	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No	nodejs No support No

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.