TypeScript for Application Developers

09:00 – 10:15

See what TypeScript actually buys you

—types as documentation, the true cost of any, strict mode first

—Takeaway A bug that shipped in JavaScript caught at compile time in front of you — the argument for the next two days, made by the compiler.

10:30 – 11:45

Model your data honestly

—interfaces vs type aliases, unions and literals, optional vs undefined

—Takeaway A real domain modelled in types precise enough that invalid states stop compiling — not just annotated, modelled.

12:00 – 13:00

Narrow like the compiler thinks

—type narrowing, guards, discriminated unions

—Takeaway A discriminated union replacing a chain of if-and-hope — with the compiler proving every case is handled.

14:00 – 15:15

Use generics without fear

—generic functions, constraints, when a generic is showing off

—Takeaway One utility written three ways — untyped, over-generic and right — and the judgment to tell them apart.

15:30 – 17:00

Type the module boundaries

—modules and exports, third-party types, declaration files

—Takeaway A dependency without types given honest ones — and the module boundary of your own code typed like a public API.

09:00 – 10:15

Type an API end to end

—typed request and response models, fetch with types, compile time vs runtime

—Takeaway An API consumed through types the whole team can trust — and the moment a renamed field breaks the build instead of the page.

10:30 – 11:45

Validate at the edge

—schema validation, parse don't assert, error types

—Takeaway External data parsed into guaranteed types at the boundary — a lying API caught at the edge, not three components deep.

12:00 – 13:00

Type asynchronous code properly

—typing promises and async flows, error handling, loading states as types

—Takeaway Loading, success and failure as one union type — the impossible "loaded but no data" state now unrepresentable.

14:00 – 15:15

Turn strict mode on in a real codebase

—migration strategy, killing any deliberately, incremental strictness

—Takeaway A genuinely loose file brought under strict mode live — with the order of operations you will reuse at work.

15:30 – 17:00

Type a small app front to back

—the capstone conversion, review, what React and Angular expect of you

—Takeaway A small application typed end to end under strict mode — and exactly the TypeScript your framework course now gets to skip.