Frontend
Learn TypeScript
TypeScript is JavaScript with type annotations. You describe the shape of your data, and the compiler warns you when code does not match that shape.
Why teams use it
- Most front-end bugs are shape mismatches, and types catch those while you are still typing.
- Editors can offer accurate autocomplete and safe renames once types exist.
- It documents intent in a way comments cannot drift away from.
Where you will meet it
When an API response changes, a typed front end shows you every place that needs updating instead of failing silently in the browser.
What to learn, and in what order
Work through these roughly in order. Jumping to the advanced list before the basics are solid is the most common way people get stuck.
Beginner
- Basic types and inference
- Interfaces and type aliases
- Typing function parameters and returns
- Working with arrays and objects
Intermediate
- Unions and narrowing
- Generics for reusable code
- Typing API responses
- Strict mode and null safety
Advanced
- Conditional and mapped types
- Discriminated unions for state modelling
- Declaration files and module boundaries
Have a project worth talking through?
Tell us what you're building or what's slowing your current system down. We'll give you a direct read on scope and approach.