Sometimes, we want to extend an object in JavaScript.

In this article, we’ll look at how to extend an object in JavaScript.

How to extend an object in JavaScript?

To extend an object in JavaScript, we can use the Object.create method.

For instance, we write

const person = {
  name: "",
  greet() {
    console.log(`Hi, I am ${this.name}.`);
  },
};

const jack = Object.create(person);
jack.name = "Jack";
jack.greet();

to call Object.create with person to create an object that inherits the prototypes of person and the properties in person.

Then we add the name property to the jack object and call greet on it.

The greet method then should log 'Hi, I am Jack.'.

Conclusion

To extend an object in JavaScript, we can use the Object.create method.