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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) {
    arguments.callee.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 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()"


Not part of any specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support ? ?13 ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support ? ? ?14 ? ? ?

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