Stage 02 · 02 · Core web · skill 2 of 4

TypeScript fundamentals

Make illegal states unrepresentable. Types are a design tool, not decoration.

Recommended first: JavaScript fundamentals

After this you will be able to

• Annotate functions and objects
• Use unions and narrowing
• Read compiler errors instead of fighting them with any

Microsoft · why we picked it

Completing this unlocks: Next.js & full-stack React