Small comparison between Dart and TypeScript languages to create class with inheritance.

Person.dart

import 'dart:html';

// A base class for a person
class Person {
    String name;
	String toString() => "Hi ! " + this.name;
	
	Person(String name) {
		this.name = name;
	}
}

// A class who inherit from Person
class Developer extends Person {
	String toString() => super.toString() + " I'm a developer :D";
	Developer(String name) : super(name);
}

// Starting point
main() {
	var person = new Developer("Yannick");
    query('#status').text = person.toString();
}

Person.js

var Person = (function () {
    var person = function (name) {
		this.name = name;
	};
	
	person.prototype.toString = function () {
		return "Hi I'm " + this.name; 
	};
	
	return person;
})();

var Developer = (function () {
	var developer = function (name) {
		Person.call(this, name);
	};
	
	developer.prototype = new Person();
	
	developer.prototype.toString = function () {
		return Person.prototype.toString.call(this) + " I'm a developer :D"; 
	};
	
	return developer;
})();

var developer = new Developer("Yannick");
console.log(developer.toString());

Person.ts

class Person {
    private name:string;
	
	constructor(name:string) {
		this.name = name;
	}
	
	public toString():string {
		return "Hi I'm " + this.name;
	}
}

class Developer extends Person {
	constructor(name:string) {
		super(name);
	}
	toString():string {
		return super.toString() + " I'm a developer :D";
	}
}

var developer:Developer = new Developer("Yannick");
console.log(developer.toString());