Difference between Class and Object in typescript

Question

Someone could explain me what is the difference between class and object in typescript.

class greeter{
  Name: string;
  Sayhello(){
    console.log("hello")
  }
}

Before I using this

var greeter = {
    Name : "",
    Sayhello: function sayhello(){
        console.log("hello");
    }
}

Answer 1

It is up to you. Both of these are valid and idiomatic TypeScript:

export class Greeter {

    name: '';

    sayHello() {
        console.log('hello');
    }
}

and

export const greeter = {

    name : '',

    sayHello: () => {
        console.log('hello');
    }
}

// if you need just the type of greeter for some reason
export type Greeter = typof greeter; 

If you don't have a need for the class, don't use them.

But you may find benefits of classes if you want to:

• manage your dependencies with Dependency Injection
• use multiple instances
• use polymorphism

If you have multiple instances, using classes or prototype constructor functions, allow you to share method implementations across all instances.

Even if you are in a purely functional paradigm, using prototype constructor functions or classes can be useful for creating monads.

If you only have one instance, and do not need for a constructor, an object is is probably fine.