JavaScript Object getOwnPropertySymbols() Method

0 1 1 minute read

The Object.getOwnPropertySymbols() method in JavaScript is a standard built-in object which returns an array of all symbol properties that are present in a given object. An empty array is returned until symbol properties are set on the object.

Syntax:

Object.getOwnPropertySymbols(obj)

Parameters:

obj: This parameter is the object whose symbol properties are to be returned.

Return value: This method returns an array of all symbol properties that correspond to the properties found directly in the given object.

Below are some examples of this method

Example 1: In this example, we will check for the symbol properties of the objects using the Object.getOwnPropertySymbols() Method in Javascript.

javascript

<script> 
    const object1 = {}; 
    let vala = Symbol('geek1'); 
    let valb = Symbol.for('geek2'); 
      
    object1[vala] = 'localSymbol'; 
    object1[valb] = 'globalSymbol'; 
      
    const objectSymbols = Object.getOwnPropertySymbols(object1); 
    console.log(objectSymbols.length); 
      
    const object2 = {};   
    let a = Symbol('a');   
    let b = Symbol.for('b');   
    const objectSymbols1 = Object.getOwnPropertySymbols(object2);   
    console.log(objectSymbols1.length);  
</script>

Output:

2
0

Example 2: In this example, we will check for the symbol properties of the objects using the Object.getOwnPropertySymbols() Method in Javascript.

javascript

<script> 
    const object1 = {}; 
    let vala = Symbol('geek1'); 
    let valb = Symbol.for('geek2'); 
    let valc = Symbol.for('geek3'); 
      
    object1[vala] = 'localSymbol'; 
    object1[valb] = 'globalSymbol'; 
    object1[valc] = 'globalSymbol'; 
      
    const objectSymbols = Object.getOwnPropertySymbols(object1); 
    console.log(objectSymbols.length); 
    console.log(objectSymbols);       
    console.log(objectSymbols[0]); 
    console.log(objectSymbols[2]); 
    console.log(objectSymbols[1]); 
</script>

Output:

3
Array [Symbol(geek1), Symbol(geek2), Symbol(geek3)]
Symbol(geek1)
Symbol(geek3)
Symbol(geek2)

We have a complete list of Javascript Object methods, to check those please go through this JavaScript Object Complete Reference article.

Supported Browsers:

Google Chrome 38 and above
Edge 12 and above
Firefox 36 and above
Opera 25 and above
Safari 9 and above

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!