Object.getPrototypeOf()
JavaScript Object.getPrototypeOf()方法
JavaScript
Object.getPrototypeOf()方法返回原型(即，内部[[
语法：
Object.getPrototypeOf(obj)
参数
obj ：这是要返回其原型的对象。
返回值：
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。
浏览器支持：
| Chrome |
5 |
| Edge |
是 |
| Firefox |
3.5 |
| Opera |
12.1 |
示例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：
示例2
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：
示例3
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：
