Working with APIs in TypeScript

Consume and build web APIs with TypeScript's full type safety. Type fetch responses, model API payloads with interfaces, handle typed errors, and build typed REST clients. Follow the ideas in small steps: first understand the concept, then practice it in the browser, and finally connect it to a realistic coding problem. Each lesson builds on the previous one so the track becomes a skill you can explain and use, not just a list of terms.

180 interactive lessons across 6 units · 36+ hours · intermediate level

What you will learn

Build practical skills in TypeScript, APIs, fetch, HTTP, Interfaces through browser-based coding exercises, guided feedback, unit quizzes, a debugging challenge, and a final project.

Course access

Unit 1, including its first 30 lessons and unit quiz, is free. The remaining 5 units require a CodeLearning365 Pro subscription.

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Working with APIs in TypeScript curriculum

The curriculum progresses from foundations to applied practice and mastery. Representative topics from every unit are listed below.

Unit 1: Foundations

30 lessons covering topics such as What Is an API? (TypeScript Types), JSON & TypeScript Interfaces, Your First Typed REST API, Typed fetch() Requests, Typed Query Parameters.

What Is an API? (TypeScript Types)
JSON & TypeScript Interfaces
Your First Typed REST API
Typed fetch() Requests
Typed Query Parameters

Unit 2: Core Concepts

30 lessons covering topics such as Power Up 031: Typed Webhook Handlers, Power Up 032: Typed OpenAPI Documentation, Power Up 033: Typed GraphQL Concepts, Power Up 034: Typed HTTP Caching, Power Up 035: Typed CORS Middleware.

Power Up 031: Typed Webhook Handlers
Power Up 032: Typed OpenAPI Documentation
Power Up 033: Typed GraphQL Concepts
Power Up 034: Typed HTTP Caching
Power Up 035: Typed CORS Middleware

Unit 3: Building Skills

30 lessons covering topics such as Power Up 061: What Is an API? (TypeScript Types), Power Up 062: JSON & TypeScript Interfaces, Power Up 063: Your First Typed REST API, Power Up 064: Typed fetch() Requests, Power Up 065: Typed Query Parameters.

Power Up 061: What Is an API? (TypeScript Types)
Power Up 062: JSON & TypeScript Interfaces
Power Up 063: Your First Typed REST API
Power Up 064: Typed fetch() Requests
Power Up 065: Typed Query Parameters

Unit 4: Applied Practice

30 lessons covering topics such as Power Up 091: Typed Webhook Handlers, Power Up 092: Typed OpenAPI Documentation, Power Up 093: Typed GraphQL Concepts, Power Up 094: Typed HTTP Caching, Power Up 095: Typed CORS Middleware.

Power Up 091: Typed Webhook Handlers
Power Up 092: Typed OpenAPI Documentation
Power Up 093: Typed GraphQL Concepts
Power Up 094: Typed HTTP Caching
Power Up 095: Typed CORS Middleware

Unit 5: Projects

30 lessons covering topics such as Power Up 121: What Is an API? (TypeScript Types), Power Up 122: JSON & TypeScript Interfaces, Power Up 123: Your First Typed REST API, Power Up 124: Typed fetch() Requests, Power Up 125: Typed Query Parameters.

Power Up 121: What Is an API? (TypeScript Types)
Power Up 122: JSON & TypeScript Interfaces
Power Up 123: Your First Typed REST API
Power Up 124: Typed fetch() Requests
Power Up 125: Typed Query Parameters

Unit 6: Mastery

30 lessons covering topics such as Power Up 151: Typed Webhook Handlers, Power Up 152: Typed OpenAPI Documentation, Power Up 153: Typed GraphQL Concepts, Power Up 154: Typed HTTP Caching, Power Up 155: Typed CORS Middleware.

Power Up 151: Typed Webhook Handlers
Power Up 152: Typed OpenAPI Documentation
Power Up 153: Typed GraphQL Concepts
Power Up 154: Typed HTTP Caching
Power Up 155: Typed CORS Middleware

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