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: "neveropen", writable: true }, prop2: {} }); console.log(geek.prop1); console.log(geek.prop2); |
Output:
"neveropen" 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
