TheDeveloperBlog.com

Home | Contact Us

C-Sharp | Java | Python | Swift | GO | WPF | Ruby | Scala | F# | JavaScript | SQL | PHP | Angular | HTML

Javascript Object setPrototypeOf() Method

Javascript Object setPrototypeOf() Method with example on javascript, object, getOwnPropertyDescriptor(), getOwnPropertyDescriptors(), defineProperties(), defineProperty(), entries(), freeze(), javascript tutorial, javascript array etc.

<< Back to JAVASCRIPT

JavaScript Object.setPrototypeOf() Method

The Object.setPrototypeOf() method sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or null. All JavaScript objects inherit properties and methods from a prototype. It is generally considered the proper way to set the prototype of an object.

Syntax:

Object.setPrototypeOf(obj, prototype)

Parameters:

obj: It is the object which is to have its prototype set.

Prototype: It is the object's new prototype (an object or null).

Return value:

This method returns the specified object.

Browser Support:

Chrome 34
Edge Yes
Firefox 31
Opera Yes

Example 1

let raay = {
  drive() {
    return 'Add raay';
  }
}
let naty  = {
  net() {
    return 'use net';
  }
}
// Set raay's __proto__ to naty's  __proto__'s  __proto__
Object.setPrototypeOf(naty, raay);

console.dir(naty); //prints the naty object
console.log(naty.net()); // use net
console.log(naty.drive()); // Add raay

Output:

 [object Object] {
  drive: drive() {
    return 'Add raay';
  },
  net: net() {
    return 'use net';
  }
}
"use net"
"Add raay"

Example 2

 var Animal = {
   speak() {
     console.log(this.name + ' makes');
   }
};

class Dog {
   constructor(name) {
   this.name = name;
  }
}

Object.setPrototypeOf(Dog.prototype, Animal); 
// If you do not do this you will get a TypeError when you invoke speak
var d = new Dog('people');
d.speak();

Output:

"people makes"

Example 3

let toyota = {
  drive() {
    return 'driving toyota';
 }
}
let camry = {
  wifi() {
    return 'carry';
  }
}
// Set toyota's __proto__ to camry's  __proto__'s  __proto__
Object.setPrototypeOf(camry, toyota);
console.dir(camry); //prints the camry object
console.log(camry.wifi()); // carry

Output:

[object Object] {
 drive: drive() {
    return 'driving toyota';
 },
  wifi: wifi() {
    return 'carry';
  }
}
"carry"

Next TopicJavaScript Objects




Related Links:

.Net

.NET Array Dictionary List String 2D Async DataTable Dates DateTime Enum File For Foreach Format IEnumerable If IndexOf Lambda LINQ Parse Path Process Property Regex Replace Sort Split Static StringBuilder Substring Switch Tuple

Java

Core Array ArrayList HashMap String 2D Cast Character Console Deque Duplicates File For Format HashSet If IndexOf Lambda Math ParseInt Process Random Regex Replace Sort Split StringBuilder Substring Switch Vector While

Related Links

Adjectives Ado Ai Android Angular Antonyms Apache Articles Asp Autocad Automata Aws Azure Basic Binary Bitcoin Blockchain C Cassandra Change Coa Computer Control Cpp Create Creating C-Sharp Cyber Daa Data Dbms Deletion Devops Difference Discrete Es6 Ethical Examples Features Firebase Flutter Fs Git Go Hbase History Hive Hiveql How Html Idioms Insertion Installing Ios Java Joomla Js Kafka Kali Laravel Logical Machine Matlab Matrix Mongodb Mysql One Opencv Oracle Ordering Os Pandas Php Pig Pl Postgresql Powershell Prepositions Program Python React Ruby Scala Selecting Selenium Sentence Seo Sharepoint Software Spellings Spotting Spring Sql Sqlite Sqoop Svn Swift Synonyms Talend Testng Types Uml Unity Vbnet Verbal Webdriver What Wpf