SOURCE

function Person(name,age){
  this.name = name;
  this.age = age;
}

Person.prototype.showName = function(){
  console.log(this.name)
}
Person.prototype.showAge = function(){
  console.log(this.age)
}

console.log('p',Person)
const p =new Person('wang',18);

const Worker = function(name,age,job){
  Person.call(this,name,age)
  this.job = job;
}
Worker.prototype = new Person();
Worker.prototype.constructor = Worker;
Worker.prototype.showJob = function(){
  console.log(this.job)
}

console.log('w',Worker)
console.log('p2',Person)
const w = new Worker('li',20,'teacher');

class Person2{
  constructor(name,age){
    this.name = name ;
    this.age =age;
  }
  showName(){
    console.log(this.name)
  }
  showAge(){
    console.log(this.age)
  }
}
console.log('cp',Person2)
const p2 = new Person2('zhao',30);

class Worker2 extends Person2{
  constructor(name,age,job){
    super(name,age);
    this.job = job
  }
  showJob(){
    console.log('job')
  }
}
console.log('cw',Worker2);
console.log('cp2',Person2);
const w2 = new Worker2('sun',88,'doctor');

.box{
  width:100px;
  height:100px;
  background:red;
  margin:10px;
  float:left;
}