Typescript basic examples

Remarks#

This is a basic example which extends a generic car class and defines a car description method.

Find more TypeScript examples here - TypeScript Examples GitRepo

1 basic class inheritance example using extends and super keyword

A generic Car class has some car property and a description method

class Car{
    name:string;
    engineCapacity:string;

    constructor(name:string,engineCapacity:string){
        this.name = name;
        this.engineCapacity = engineCapacity;
    }

    describeCar(){
        console.log(`${this.name} car comes with ${this.engineCapacity} displacement`);
    }
}

new Car("maruti ciaz","1500cc").describeCar();

HondaCar extends the existing generic car class and adds new property.

class HondaCar extends Car{
    seatingCapacity:number;

    constructor(name:string,engineCapacity:string,seatingCapacity:number){
        super(name,engineCapacity);
        this.seatingCapacity=seatingCapacity;
    }

    describeHondaCar(){
        super.describeCar();
        console.log(`this cars comes with seating capacity of ${this.seatingCapacity}`);
    }
}
new HondaCar("honda jazz","1200cc",4).describeHondaCar();

2 static class variable example - count how many time method is being invoked

here countInstance is a static class variable

class StaticTest{
    static countInstance : number= 0;
    constructor(){
        StaticTest.countInstance++;
    }
}

new StaticTest();
new StaticTest();
console.log(StaticTest.countInstance);