Question

How to use inheritance and extends class in JavaScript ES6

Answer 1

class Worker {
    constructor(_id, _name) {
        this.id = _id;
        this.name = _name;
        this.view = function() {
            console.log(this.id + ' ' + this.name);
        };
    }
}
 
class Department extends Worker {
    constructor(id, name, _department) {
        super(id, name);
        this.department = _department;
        this.show = function() {
            this.view();
            console.log(this.department);
        };
    }
}
  
const department = new Department(2345, 'Tom', 'Programming');
  
department.show();
 
 
 
      
/*
run:
    
2345 Tom
Programming
  
*/

 

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Answer 2

class CTest {  
    constructor(_name, _age){ 
        this.name = _name; 
        this.age = _age; 
    } 
} 

class CView extends CTest {  
    show() { 
        console.log(this.name, this.age);
    } 
 }  

const obj = new CView("Tom", 46) 
      
console.log(obj.name);
console.log(obj.age);

obj.show(); 




/*
run:

Tom
46
Tom 46

*/

 

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