TYPESCRIPT

typescript override type of property

interface A {
    x: string
}

export type B = Omit<A, 'x'> & { x: number };

typescript override

class Boy {
    name : string
    about() : void {
        console.log(this.name +" is an intelligent boy..")
    }
}
   
class Student extends Boy {
    rollnumber : number;
    marks: number;
    constructor(rollnumber : number, marks : number, 
    name1 : string){
        super(); 
        this.rollnumber = rollnumber
        this.name = name1
        this.marks = marks
    }
    displayStudentInformation() : void {
        console.log("Name : "+ this.name +", Roll Number : " + 
        this.rollnumber +", 
        Scores : " + this.marks + " out of 100" )
    }
    about() : void {
        // Invokes parent class about() method here also.
        super.about(); 
        console.log(this.name + " scores well...")
    }
} 
  
let student = new Student(2, 96, "Rohit");
student.displayStudentInformation();
student.about();