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
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