Hands-On Introduction to Typed Programming with TypeScript

Write your first TypeScript file, annotate variables with string and number types, compile with tsc, and see TypeScript catch type errors during development.

Explore primitive types in TypeScript, including string, number, boolean, null, undefined, BigInt, and symbol, and learn how type inference and explicit annotations guide type checking.

Explore TypeScript's flexible types by examining any, unknown, never, and union types. Learn how to safely narrow unknown values with type checks and use literal unions to constrain inputs.

Explore how TypeScript defines object shapes with ID, name, and optional isWorking, uses type aliases, and types arrays with both [] and generic syntax for arrays of custom types.

Explore read-only properties and as type assertions in TypeScript, and compare interfaces and type aliases for object shapes, including unions and extends with examples like animal, dog, and person.

Explore TypeScript functions by annotating parameters and return types, using never and void, and comparing traditional functions with arrow functions, defaults, and inferred return types for type-safe code.

Explore TypeScript enums, using direction and status examples to assign friendly names to values, improve readability, and reduce errors with numeric versus string enum approaches.

Explore how TypeScript defines blueprints with classes, constructors, and access modifiers. Learn inheritance with extends and super, interfaces with implements, and practical examples of public, private, and protected members.

Explore how generics let functions and classes work with any data type while preserving type safety, using generic identity, a get first function, and extends constraints on length.

Wrap up the course by consolidating key TypeScript skills, including classes and generics, and explore tooling like ts node, tsc with a watch flag, tsconfig.json, and type definitions.