The Object.setPrototypeOf() method in JavaScript is a standard built-in object which sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or null.
Syntax:
Object.setPrototypeOf(obj, prototype)
Parameters: This method accepts two parameters as mentioned above and described below:
- obj: This parameter is the object which is going to have its prototype set.
- Prototype: This parameter is the object’s new prototype. It can be an object or a null object.
Return value: This method returns the specified object.
The below examples illustrate the Object.setPrototypeOf() Method in JavaScript:
Example 1: In this example, we will set a prototype of an object using the Object.setPrototypeOf() Method in JavaScript.
javascript
let geek1 = { prop1() { return 'Object.isExtensible()'; }, prop2() { return 'JavaScript '; } } let geek2 = { prop3() { return 'Geeksforneveropen'; } } Object.setPrototypeOf(geek2, geek1); console.dir(geek2); console.log(geek2.prop3()); console.log(geek2.prop2()); console.log(geek2.prop1()); |
Output:
"Geeksforneveropen" "JavaScript " "Object.isExtensible()"
Example 2: In this example, we will set a prototype of an object using the Object.setPrototypeOf() Method in JavaScript.
javascript
let neveropen1 = { prop1() { console.log(this.name + ' is Best platform'); }, prop2() { console.log(this.name + ' provide jobs opportunity'); } }; class neveropen2 { constructor(name) { this.name = name; } } Object.setPrototypeOf(neveropen2.prototype, neveropen1); let result = new neveropen2('neveropen'); result.prop1(); result.prop2(); |
Output:
"neveropen is Best platform" "neveropen provide jobs opportunity"
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.setPrototypeOf() method are listed below:
- Google Chrome 34 and above
- Edge 12 and above
- Firefox 31 and above
- Opera 21 and above
- Safari 9 and above
