What is APIs & Data Fetching?

APIs (Application Programming Interfaces) allow frontend applications to communicate with backend services. This includes REST APIs, GraphQL, and modern data fetching patterns like React Query or SWR.

Why is it Important?

Almost every modern web application fetches data from APIs. Understanding how to make API calls, handle loading/error states, cache responses, and optimize data fetching is essential for building responsive applications.

What to Learn

  • Fetch API and Axios
  • REST API conventions
  • GraphQL basics
  • Error handling and loading states
  • Caching strategies
  • Authentication (JWT, OAuth)

Career Relevance

API integration is a core frontend skill. Companies value developers who can efficiently fetch, cache, and display data while handling edge cases gracefully.

Related Jobs

Frontend DeveloperFull Stack DeveloperAPI DeveloperReact Developer