📅  最后修改于: 2020-10-25 11:44:27             🧑  作者: Mango
JavaScript的Object.getPrototypeOf()方法返回指定对象的原型(即内部[[Prototype]]属性的值)。
Object.getPrototypeOf(obj)
obj:这是一个将返回其原型的对象。
此方法返回给定对象的原型。如果没有继承的属性,则此方法将返回null。
Chrome | 5 |
Edge | Yes |
Firefox | 3.5 |
Opera | 12.1 |
let animal = {
eats: true
};
// create a new object with animal as a prototype
let rabbit = Object.create(animal);
alert(Object.getPrototypeOf(rabbit) === animal); // get the prototype of rabbit
Object.setPrototypeOf(rabbit, {}); // change the prototype of rabbit to {}
输出:
true
const prototype1 = {};
const object1 = Object.create(prototype1);
const prototype2 = {};
const object2 = Object.create(prototype2);
console.log(Object.getPrototypeOf(object1) === prototype1);
console.log(Object.getPrototypeOf(object1) === prototype2);
输出:
true
false
const prototype1 = {};
const object1 = Object.create(prototype1);
const prototype2 = {};
const object2 = Object.create(prototype2);
console.log(Object.getPrototypeOf(object1) === prototype1);
console.log(Object.getPrototypeOf(object2) === prototype2);
输出:
true
true