Inheritance of class - 03

We can inherit in Class…

• By prototype

• By super keyword

• By setter method

By prototype:

 class Student {
     constructor(name, age, title) {
       this.name = name;
       this.age = age;
       this.title = title;
     }
     get dateOfBirth() {
       return `His name is ${this.name}, and his age is ${this.age}`;
     }
}

Student.prototype.methodVal = function () {
 return `His name is ${this.name}, & his age is ${this.age}, he is a     ${this.title}`;
};

const parentClass = new Student("Mozahedul", 65, "student");
console.log(parentClass);
console.log(parentClass.methodVal());

By Super keyword:

class Student {
 constructor(name, age, title) {
   this.name = name;
   this.age = age;
   this.title = title;
 }
 methodVal() {
   return `His name is ${this.name}, and his age is ${this.age}`;
 }
 get getterMethod() {
   return `Her name is ${this.name}, age is ${this.age}, & she is a     ${this.title}`;
 }
}

class Teacher extends Student {
 constructor(name, age, title, subject) {
   super(name, age, title);
   this.subject = subject;
 }
}

// Parent class instance
const parentClass = new Student("Mozahedul", 65, "student");
console.log("PARENT CLASS ==> ", parentClass.methodVal());

// Child class instances
const childClass = new Teacher("mofizul", 15, "teacher", "mathematics");
console.log("CHILD CLASS ==> ", childClass);
console.log("CHILD CLASS METHOD ==> ", childClass.methodVal());
console.log("PARENT CLASS GETTER METHOD ==> ", childClass.getterMethod);