type for class typescript code example

Example 1: typescript class type t

class GenericNumber<T> {
    zeroValue: T;
    add: (x: T, y: T) => T;
}

let myGenericNumber = new GenericNumber<number>();
myGenericNumber.zeroValue = 0;
myGenericNumber.add = function(x, y) { return x + y; };

Example 2: classes in typescript

class Info {
  private name: string ;
  constructor(n:string){
    this.name = n ;
  };
  describe(){
    console.log(`Your name is  ${this.name}`);
  }
}

const a = new Info('joyous');
a.describe();

Example 3: how to extend ts class

class Animal {
  move(distanceInMeters: number = 0) {
    console.log(`Animal moved ${distanceInMeters}m.`);
  }
}

class Dog extends Animal {
  bark() {
    console.log("Woof! Woof!");
  }
}

const dog = new Dog();
dog.bark();
dog.move(10);
dog.bark();Try