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.


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"

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

You can dynamically change the displayName of a function:

var object = {
  // anonymous
  someMethod: function(value) {
    this.displayName = 'someMethod (' + value + ')';

console.log(object.someMethod.displayName); // "undefined"

console.log(object.someMethod.displayName); // "someMethod (123)"


It is usually preferred by consoles and profilers over 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()"


Not part of any specification.

Browser compatibility

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 ? ? ? ? ? ?

Document Tags and Contributors

 Contributors to this page: fscholz, Mingun, toothbrush
 Last updated by: fscholz,