Table of Contents
Polymorphism – Overloading - TypeScript - JavaScript's Superset
Is there any overloading in JavaScript?
Yes, function overloading is possible in TypeScript. The following code snippet will demonstrate how:
class Length{
Length(length: number);
Length(length:string);
Length(value: any) {
if (value && typeof value == "number") {
alert("overload 1");
}
if (value && typeof value == "string") {
alert("overload 2");
}
}}
Polymorphism - Overriding
Method Overriding is a mechanism by which the child class redefines the superclass’s method.
The following code snippet will demonstrate how:
class PrinterClass {
doPrint():void {
console.log("doPrint() from Parent called…")
}
}
class StringPrinter extends PrinterClass {
doPrint():void {
super.doPrint()
console.log("doPrint() is printing a string…")
}
}
var obj = new StringPrinter()
obj.doPrint()