---
title: 原型和原型链
date: 2018-06-10 15:28:35
permalink: /pages/680e335c611f2/
categories:
- 面试题
- JavaScript
tags:
-
---
## 怎么获取一个对象的原型
### Object.getPrototypeOf
```js
class Person {}
let p1 = new Person();
Object.getPrototypeOf(p1) === Person.prototype;
```
### \_\_proto\_\_
```js
class Person {}
let p1 = new Person();
p1.__proto__ === Person.prototype;
```
### constructor.prototype
```js
class Person {}
let p1 = new Person();
p1.constructor.prototype === Person.prototype;
```
## 原型对象和构造函数关系
在 js �
