This document provides an introduction to TypeScript, a typed superset of JavaScript. It discusses how TypeScript uses static typing to enable powerful development tools and practices. It also demonstrates how TypeScript uses structural typing through an example of assigning objects of different types.

1. p r o d u c e d b y
intro to

2. d i r e c t e d b y

3. a l e s s i o
d e b e n e d e t t o

4. a n d r e a
b a l d u c c i

6. s t a r r i n g

11. episode 1

12. a long time ago
in a galaxy
far, far away

13. …written in
10 days for
the
mythical…

14. NON PROFESSIONAL PROGRAMMER
NON PROFESSIONAL PROGRAMMER

16. nowadays

19. welcome to the
{undefined} side
==
NaN NaN

25. episode 2

26. TypeScript is a typed superset
of JavaScript that compiles to
plain JavaScript

27. Types enable TypeScript
developers to use highly-
productive development
tools and practices

28. static checking,
symbol-based navigation,
statement completion, and
code refactoring.

29. https://github.com/borisyankov/DefinitelyTyped

30. de mo
http://tinyurl.com/devmarche-tsintro

32. class Jedi {
name: string;
constructor(name: string) {
this.name = name;
}
useTheForce() { }
}

33. class SuperHero {
name: string;
constructor(name: string) {
this.name = name;
}
useTheForce() { }
fly() {}
}

34. var hulk = new SuperHero('Hulk');
var yoda = new Jedi('Yoda');

35. yoda = hulk

36. TypeScript is a
structural
type system

37. episode 3

38. http://tinyurl.com/devmarche-ngts

40. git checkout step0