Javascript Object getPrototypeOf() Method

by Online Tutorials Library July 22, 2022

JavaScript Object.getPrototypeOf() Method

The Object.getPrototypeOf() method of JavaScript returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.

Syntax:

Parameter

obj: It is an object whose prototype is to be returned.

Return value:

This method returns the prototype of the given object. If there are no inherited properties, this method will return null.

Browser Support:

Chrome	5
Edge	Yes
Firefox	3.5
Opera	12.1

Example 1

  let animal = {    eats: true  };     // create a new object with animal as a prototype  let rabbit = Object.create(animal);  alert(Object.getPrototypeOf(rabbit) === animal); // get the prototype of rabbit    Object.setPrototypeOf(rabbit, {}); // change the prototype of rabbit to {}  

Output:

true

Example 2

  const prototype1 = {};  const object1 = Object.create(prototype1);  const prototype2 = {};  const object2 = Object.create(prototype2);  console.log(Object.getPrototypeOf(object1) === prototype1);  console.log(Object.getPrototypeOf(object1) === prototype2);   

Output:

true  false

Example 3

  const prototype1 = {};  const object1 = Object.create(prototype1);  const prototype2 = {};  const object2 = Object.create(prototype2);  console.log(Object.getPrototypeOf(object1) === prototype1);  console.log(Object.getPrototypeOf(object2) === prototype2);   

Output:

true  true

Next TopicJavaScript Objects

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Javascript Object getPrototypeOf() Method

JavaScript Object.getPrototypeOf() Method

Syntax:

Parameter

Return value:

Browser Support:

Example 1

Example 2

Example 3

JavaScript Symbol

Kotlin Array

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