Who put types

in my Javascript?

Who

What

Why

Whow

Born (to the public) in 2012 @ Microsoft

Typescript is a superset of javascript

Anything you write in Typescript natively compiles down to javascript. 

This also means all javascript is valid Typescript!

But why...?

• Static Typing
• Type inference
• Code and Type Hints
• Many common javascript libraries already have "definition files" for types
• Supports type checking with JSDoc
• Reduce common errors before code reaches production
• It's customizable