JavaScript Object defineProperties() Method
Last Updated :
26 May, 2023
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: "geeksforgeeks",
writable: true
},
prop2: {}
});
console.log(geek.prop1);
console.log(geek.prop2);
|
Output:
"geeksforgeeks"
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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