Learn all about the create() method of the Object object in JavaScript.
Introduced in ES5, the create() method is used to create a new object with a specified prototype.
Usage
To use the create() method, follow this syntax:
const newObject = Object.create(prototype);
For example:
const animal = {};
const dog = Object.create(animal);
The newly created object will inherit all the properties of the prototype object.
You can also add new properties to the object that the prototype lacked by specifying a second parameter:
const newObject = Object.create(prototype, newProperties);
Here, newProperties
is an object of objects that define each property.
For example:
const animal = {};
const dog = Object.create(animal, {
breed: {
value: 'Siberian Husky'
}
});
console.log(dog.breed); //'Siberian Husky'
Note that you must pass a property descriptor object ({ value: 'Siberian Husky' }
) instead of just assigning a value directly (breed: 'Siberian Husky'
).
The create() method is often used in combination with Object.assign()
:
const dog = Object.assign(Object.create(animal), {
bark() {
console.log('bark');
}
});
By using Object.create() along with Object.assign(), you can create a new object that inherits properties from a prototype and add new properties or methods to the object.