Class Declaration - 01

NoteBook: ⇒ 

When we use the set method in a class, then we have to keep in mind that we have to set values from outside of the class basically with the class instance.

Class Inheritance:

class superClass {
       constructor(name, age, title) {
           this._name = name;
           this._age = age;
           this._title = title;
       }
 
       person() {
           return this._name;
       }
       get personTitle() {
           return this._age;
       }
    };

class subClass extends superClass {
   constructor(name, age, title) {
	   /* Here with the super keyword we make available
	   the constructor properties of parent class for child class. */
	   super(name, age, title);
   }
   get childGet () {
	   return this._name;
   }
}

const supClass = new superClass('Mozahedul', 43);
const personMethod = supClass.person();
console.log(personMethod);

let getMethod = supClass.personTitle;
console.log(getMethod);
const childInstance = new subClass('rasel');
const resultGet = childInstance.childGet;
console.log(resultGet);

/* We can also call the properties and method of parent
class inside the child class with the child class instance. */

const childResult = childInstance.person();
console.log(childResult);

 class Man {
     constructor(name, age) {
       this.name = name;
       this.age = age;
     }
     play() {
       console.log(`my name is ${this.name}.`)
     }
     get setPerson() {
       console.log(`I am ${this.name} & my age is ${this.age}`)
     }
     set setPerson(name) {
       this.name = name;
     }
}

let person = new Man("mozahedu", 28);
console.log(person);
person.setPerson = "shahidul";
console.log(person.setPerson);