JavaScript & TypeScript Primer
Bearings: check node and the compiler, read characters and spacing, then the roster you will type today — with the first narrowing guard you will reuse all week. (JavaScript & TypeScript Primer) (12 slides)
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TypeScript from JavaScript to Validate Boundaries
Fourteen modules, strict mode throughout: from JavaScript essentials and the type system through classes, generics, advanced and conditional types, async, external code, architecture, tooling, and testing — plus a typed agent pipeline, every lesson with runnable examples from one dataset, the 2004 Patriots roster.
Ask about any TypeScript concept
Answers grounded in this course knowledge plus the TypeScript handbook.
Slide decks
Twenty-minute sections, viewer plus presenter plus print-ready PDFs.
Core Types
Primitives, collections, inference, unions and literals, the four special types, a production cut, and the typing lab. (8 slides)
Presenter view
Objects, Interfaces & Types
Interfaces and aliases, optional and readonly fields, dictionaries, extension and composition, structural typing, a production cut, and the modeling lab. (8 slides)
Presenter view
Functions in Depth
Typed params and returns, optional and default parameters, overloads and call signatures, this and arrows, higher-order functions and callbacks. (10 slides)
Presenter view
Classes & OOP in TypeScript
Modifiers and readonly, inheritance with abstract classes and interfaces, getters and setters, statics, parameter properties, and production patterns. (10 slides)
Presenter view
Conditional & Type-Level Programming
How TypeScript narrows a wide type down to the exact one you need: equality, typeof, truthiness, unions, type predicates, whole-object validation, assertions, never, intersections, in, and instanceof. (22 slides)
Presenter view
Generics
GearItem<T> — one kit shape serving every payload: capture and constrain, inventory tables, and tag shapes the compiler checks — taught through patrol gear. (11 slides)
Presenter view
Advanced & Utility Types
Utility types that reshape one honest record: keep fields, drop fields, map tables, derive keys, and write the loop yourself. (8 slides)
Presenter view
Working with External & Untyped Code
Types for code you did not write: declarations, community types, checked JavaScript, module boundaries, and migration in slices. (8 slides)
Presenter view
Asynchronous Programming
Promise types, async-await, API shapes, error patterns, and the telemetry fallback - ending in a typed data layer lab. (10 slides)
Presenter view
Application Architecture & Patterns
Module seams, repositories, domain modeling with the eight outdoor skills — ending in a mini app lab. (8 slides)
Presenter view
Configuration & Tooling
The strict family, beyond-strict flags, lint and format, builds, and one-flag-per-commit adoption - ending in a strict-config lab. (8 slides)
Presenter view
Testing TypeScript
Red-green loop, first test, mocks, fixtures, async tests, tdd - ending in a typed suite lab. (10 slides)
Presenter view
Best Practices & Common Pitfalls
Code walk, not lecture: why prompts stack, what the logo does and what changes it, where generics pay off, and the incident behind a validator. (6 slides)
Presenter view
Capstone Project: Trail Buddy — Agents That Check Your Work
Agents in the wild: the buddy rule, Playwright eyes, compiler hands, the agent red-green loop, leave no trace, and a trail-check lab. (8 slides)