You've heard about TypeScript and maybe poked at a docs page or two. But it's still a mystery for you. Not to worry! Josh Goldberg -author of the O'Reilly Learning TypeScript book- will walk you through the foundations of "types" and a "type system" up through the important language features you'll need to get started understanding TypeScript.

This workshop will go through through topics equivalent to the Learning TypeScript book table of contents - a battle-tested, intentional set of topics that build on each other to teach TypeScript. We'll cover each of the chapters:

1. From JavaScript to TypeScript: Why JavaScript is the way it is with respect to types (or lack thereof), and where TypeScript does or does not fit in
2. The Type System: Foundations of how TypeScript's type system fits in to JavaScript code and understands your values
3. Unions and Literals: How TypeScript understands values that can be one or multiple possible primitives, along with strict null checking (the "billion dollar mistake") and the powerful concept of "type narrowing"
4. Objects: How TypeScript's "structural typing" allows it to understand objects by their shape and intent, not just by their declaration forms
5. Functions: How TypeScript understands function inputs, outputs, and quirks around "void" and "never" types
6. Arrays: TypeScript's understanding of fixed type, evolving any, and fixed size ("tuple") arrays
7. Interfaces: Akin to types, but with advantages on readability and performance, and an excuse to look at various property modifiers allowed on both
8. Classes: Broadly how TypeScript models class inheritance, properties, and static fields -- even if your framework of choice doesn't go deeply into them
9. Type modifiers: Various keywords such as 'keyof' and 'typeof' that bend the type system to your will
10. Generics: Adding in type parameters that allow constructs such as functions and interfaces to be flexible on what types and values they're used for
11. Declaration files: How external JavaScript -and your own built outputs- can still be described in the type system
12. Using IDE features: Code navigation, name completions, and error debugging that level up any JavaScript and/or TypeScript developer
13. Type Operations: Introducing logic in the type system with mapped and conditional types

Each session consists of a 25-30 minute interactive lecture+workshop, with 5-10 minutes in-between for bio breaks and miscellaneous questions, and a lunch break in the middle.