Web/JavaScript/Reference/Global objects/Object/getOwnPropertySymbols

The Object.getOwnPropertySymbols() method returns an array of all symbol properties found directly upon a given object.

Syntax

Object.getOwnPropertySymbols(obj)

Parameters

obj: The object whose symbol properties are to be returned.

Return value

An array of all symbol properties found directly upon the given object.

Description

Similar to Object.getOwnPropertyNames(), you can get all symbol properties of a given object as an array of symbols. Note that Object.getOwnPropertyNames() itself does not contain the symbol properties of an object and only the string properties.

As all objects have no own symbol properties initially, Object.getOwnPropertySymbols() returns an empty array unless you have set symbol properties on your object.

Examples

Using getOwnPropertySymbols

var obj = {};
var a = Symbol('a');
var b = Symbol.for('b');

obj[a] = 'localSymbol';
obj[b] = 'globalSymbol';

var objectSymbols = Object.getOwnPropertySymbols(obj);

console.log(objectSymbols.length); // 2
console.log(objectSymbols);        // [Symbol(a), Symbol(b)]
console.log(objectSymbols[0]);     // Symbol(a)

Specifications

Specification
ECMAScript (ECMA-262)The definition of 'Object.getOwnPropertySymbols' in that specification.

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
`getOwnPropertySymbols`	Chrome Full support 38	Edge Full support 12	Firefox Full support 36	IE No support No	Opera Full support 25	Safari Full support 9	WebView Android Full support 38	Chrome Android Full support 38	Firefox Android Full support 36	Opera Android Full support 25	Safari iOS Full support 9	Samsung Internet Android Full support 3.0	nodejs Full support 0.12

Legend

Full support: Full support
No support: No support