JavaScript Object defineProperties() Method

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The Object.defineProperties() method in JavaScript is a standard built-in Object that defines a new or modifies existing properties directly on an object and it returns the object.

Syntax:

Object.defineProperties(obj, props)

Parameter:

Obj: This parameter holds the object on which the properties are going to be defined or modified.
Props: This parameter is an object whose own enumerable properties constitute descriptors for the properties to be defined or modified.

Return Value: This method returns an object which is passed as an argument to the function.

Below examples illustrate the Object.defineProperties() method in JavaScript:

Example 1: In this example, we will define new properties to an object using the Object.defineProperties() method in JavaScript.

javascript

const geek = {}; 
  
Object.defineProperties(geek, { 
    prop1: { 
        value: "zambiatek", 
        writable: true
    }, 
    prop2: {} 
}); 
  
console.log(geek.prop1); 
console.log(geek.prop2);

Output:

"zambiatek"
undefined

Example 2: In this example, we will define new properties and modify some properties of an object using the Object.defineProperties() method in JavaScript.

javascript

let geek = {}; 
Object.defineProperties(geek, { 
    'prop1': { 
        value: "Geeks", 
        writable: true
    }, 
    'prop2': { 
        value: 'Hello', 
        writable: false
    } 
}); 
console.log(geek.prop2); 
console.log(geek.prop1); 
  
const geek1 = {}; 
Object.defineProperties(geek1, { 
    prop1: { 
        value: "Hi", 
        value: "Hello", 
        value: "Namaste", 
    }, 
    prop2: { 
        value: " And ", 
    }, 
    prop3: { 
        value: "learn", 
        value: "Stay Safe", 
    } 
}); 
  
console.log(geek1.prop1, geek1.prop2, geek1.prop3);

Output:

"Hello"
"Geeks"
"Namaste" " And " "Stay Safe"

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

Supported Browsers: The browsers supported by Object.defineProperties() method are listed below:

Google Chrome 6.0 and above
Internet Explorer 9.0 and above
Mozilla 4.0 and above
Opera 11.1 and above
Safari 5.0 and above

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