JavaScript Object.getOwnPropertySymbols()

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


const symbol1 = Symbol('symbol1');
const symbol2 = Symbol('symbol2');

const obj = {
  property1: 'value1',
  [symbol1]: 'value2',
  [symbol2]: 'value3'

// get all the symbols of the obj const symbols = Object.getOwnPropertySymbols(obj);
console.log(symbols); // Output: [ Symbol(symbol1), Symbol(symbol2) ]

getOwnPropertySymbols() Syntax

The syntax of the getOwnPropertySymbols() method is:


Here, getOwnPropertySymbols() is a static method. Hence, we need to access the method using the class name, Object.

getOwnPropertySymbols() Parameters

The getOwnPropertySymbols() method takes in:

  • obj - the object whose symbol properties are to be returned.

getOwnPropertySymbols() Return Value

The getOwnPropertySymbols() method returns an array of all symbol properties found in the given object.

Note: Object.getOwnPropertySymbols() returns all symbol properties of the object while Object.getOwnPropertyNames() returns the string properties.

Example: JavaScript Object.getOwnPropertySymbols()

// create a symbol id
let id = Symbol("id");

// create a symbol name
let name = Symbol("name");

// create an object with
// symbol keys: id and name
// and string key: age

let superhero1 = {
  [id]: 102,
  [name]: "Bruce Wayne",
  age: 40 

// get all symbols of superhero1 let objectSymbols = Object.getOwnPropertySymbols(superhero1);
// print the symbols console.log(objectSymbols); // Output: [ Symbol(id), Symbol(name) ]

In the above program, we have created an object superhero1 with the following properties:

  • symbols - id and name
  • string - age

Then, we used the getOwnPropertySymbols() method on superhero1 to list its symbol properties.

As expected, we get an array listing only the symbols id and name as the output.

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