In this typescript tutorial we will discuss about method overriding in typescript.
Method Overriding:
- A method from the base (or parent) class may be replaced with a method with the same name and signature from the derived (child) class. This procedure is known as method overriding.
- A child (derived) class method in this procedure may or may not make use of the logic specified in the parent (base) class method.
- The super keyword can be used to call a specific method or property from the base class into a child class in order to invoke that method or property.
- Every time we wish to modify a parent class method’s behaviour in a child class, method overriding is helpful.
Example :
class Boy {
name : string
about() : void {
console.log(this.name +” is an intelligent boy..”)
}
}
class Employee extends Boy {
Employeenumber : number;
constructor(Employeenumber : number,
name1 : string){
super();
this.Employeenumber = Employeenumber
this.name = name1
}
displayEmployeeInformation() : void {
console.log(“Name : “+ this.name +”, Employeenumber : ” +
this.Employeenumber)
}
about() : void{
console.log(this.name)
}
}
let Employe = new Employee(10, “Ajay”);
Employe.displayEmployeeInformation();
Employe.about();
Output :
Name : Ajay,Employeenumber :10
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