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JavaScript Object create() Method - GeeksforGeeks

Last Updated : 12 Jul, 2024

JavaScript object.create() method is used to create a new object with the specified prototype object and properties. Object.create() method returns a new object with the specified prototype object and properties.

Object.create(prototype[, propertiesObject])

• prototype: It is the prototype object from which a new object has to be created.
• propertiesObject: It is an optional parameter. It specifies the enumerable properties to be added to the newly created object.

• Object.create() returns a new object with the specified prototype object and properties. 

Examples 1: In this example, there are two functions "fruits" and "apple".A new instance of apple is created which is named as "app" and it has been specified with the prototype and property of "fruits" i.e. this.name = 'fruit 1'. 

// creating a function which will be the 
// prototype for the object to be created later
function fruits() {
  this.name = 'fruit 1';
}

// creating a function to whose object will 
// inherit properties from the prototype 
// using object.create() method
function
  apple() {
  fruits.call(this);
}

// creating an object of the apple function which
// will have properties of the prototype 
// object i.e. fruits
apple.prototype = Object.create(fruits.prototype);
const app = new apple();

// Displaying the created object
console.log(app.name);

Output: 

"fruit 1"

Example 2: In this example, there are two functions "fruits" and "apple".A new instance of apple is created which is named "app" and it has been specified with the prototype and property of "fruits" i.e. this.name = 'fruit 1' and this .season = 'summer'.

// creating a function which will be the
// prototype for the object to be created later
function fruits() {
  this.name = 'fruit 1';
  this.season = 'summer';
}

// creating a function to whose object 
// will inherit properties from the   
// prototype using object.create() method
function apple() {
  fruits.call(this);
}

// creating an object of the apple function which
// will have properties of the prototype 
// object i.e. fruits
apple.prototype
  = Object.create(fruits.prototype);
const app = new apple();

// Displaying the created object
console.log(app.name);
console.log(app.season);

Output: 

"fruit 1"
"summer"

• Object.create() is used for implementing inheritance.

• Object.create( ) method throws a TypeError exception if the propertiesObject parameter isn't null.
• Object.create( ) method throws a TypeError exception if the propertiesObject parameter is a non-primitive object.

We have a complete list of Javascript Object methods, to check those please go through this JavaScript Object Complete Reference article.

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