Metoda JavaScript Object.setPrototypeOf () postavlja prototip određenog objekta na drugi objekt ili nulu.
Sintaksa setPrototypeOf()metode je:
Object.setPrototypeOf(obj, prototype)
setPrototypeOf()Metoda, kao statičke metode, zove se pomoću Objectime klase.
parametri setPrototypeOf ()
setPrototypeOf()Postupak uzima u:
- obj - objekt kojem treba postaviti prototip.
- prototip - novi prototip objekta (objekt ili nula).
Vrati vrijednost iz setPrototypeOf ()
- Vraća navedeni objekt.
Napomena: Promjena ((Prototype))objekta trenutno je vrlo spora operacija u svakom pregledniku i JavaScript mehanizmu.
Primjer 1: Korištenje Object.setPrototypeOf ()
let Animal = ( makeSound() ( console.log(`$(this.name), $(this.sound)!`); ), ); // defining new Dog object function Dog(name) ( this.name = name; this.sound = "bark"; // setting prototype to Animal Object.setPrototypeOf(this, Animal); ) dog1 = new Dog("Marcus"); dog1.makeSound(); // Marcus, bark!
Izlaz
Marcus, laj!
Primjer 2: Korištenje Object.setPrototypeOf ()
let Animal = ( makeSound() ( console.log(`$(this.name), $(this.sound)!`); ), ); // defining object class Dog ( constructor(name, age) ( this.name = name; this.sound = "bark"; ) introduce() ( console.log(`I'm $(this.name). I am $(this.age) years old.`); ) ) // Here Dog.prototype is passed as it is an object, while Dog is not an object Object.setPrototypeOf(Dog.prototype, Animal); dog1 = new Dog("Marcus", 3); console.log(dog1); dog1.makeSound(); // Marcus, bark!
Izlaz
naziv: "Marcus" zvuk: "kora" __proto__: konstruktor: klasa Pas uvesti: ƒ Introduction () __proto__: makeSound: ƒ makeSound () __proto__: Objekt Marcus, kora!
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