原型和原型链深入

爱学习的前端歌谣

发布于 2023-11-11 20:49:02

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发布于 2023-11-11 20:49:02

文章被收录于专栏：前端小歌谣前端小歌谣

前言

我是歌谣最好的种树是十年前其次是现在今天继续给大家带来的是原型和原型链的深入讲解

环境配置

npm init -y
yarn add vite -D

修改page.json配置端口

{
  "name": "demo1",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "vite --port 3002"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "vite": "^4.4.9"
  }
}

案例1

Professor.prototype.tSkill="JAVA"
function Professor(){
}
var professor=new Professor()
Teacher.prototype=professor
function Teacher(){
    this.mSkill="JS/JQ"
}
var teacher=new Teacher()
Student.prototype=teacher
function Student(){
    this.pSkill='HTML/CSS'
}
var student=new Student()
console.log(student.pSkill)
console.log(student.mSkill)
console.log(student.tSkill)

运行结果

案列2

function Teacher(){
    this.mSkill="JS/JQ";
    this.success={
        alibaba:"28",
        tencent:"30"
    }
}
var teacher=new Teacher()
Student.prototype=teacher
function Student(){
    this.pSkill="HTML/CSS"
}


var student=new Student()
student.success.baidu='100'
console.log(teacher,student)

运行结果

案列3

function Teacher(){
    this.mSkill="JS/JQ";
    this.students=500
}
var teacher=new Teacher()
Student.prototype=teacher
function Student(){
    this.pSkill="HTML/CSS"
}


var student=new Student()
student.students++
console.log(student,teacher)

运行结果