Object.create()

Object.create() is one of the 4 techniques to create a new object in JS.

It creates a new object by copying an existing object into the prototype of a new object.

This is the main concept of Object.create(). If you remember this line then you will be able to answer any question related to this concept.

Example

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const car = {
    wheels: 4
}

const bmw = Object.create(car);

console.log(bmw);   //   {}
                    //    __proto__:
                    //        wheels: 4

The newly create object will inherit all the prototype object properties. In this case - bmw is a newly created object, and it inherits all the prototype object properties of car.

Uses

Object.create() is mainly used to achieve classical inheritance.

Interview questions

  • Object.create() - Input/Ouput
  • What is the difference between Object.create() and new keyword? .
  • How Object.create() is different from other object creation methods?

    Ans: It creates a new object by copying an existing object into the prototype of a new object.

  • Difference between var obj = Object.create(null) and var obj = Object.create() ?