Full-stack & DevOps
🔗 Connect front and back
The full flow: the frontend consumes the API with fetch, respects the data contract, and handles loading and error states.
What you'll learn
- Consume a REST API with
fetchand extract the JSON body from the response - Handle the three states of every server call: loading, error, and data
- Respect the API contract and adapt the backend response to the shape the UI needs
- Diagnose and anticipate CORS blocks when connecting two different origins
Lessons
The full-stack flow: fetch to the APIHow the frontend requests data from the backend. The API contract: JSON, states, and CORSThe agreement between front and back, and why the browser blocks origins. States on the client: loading, error, and dataThe three situations that every API call goes through.Practice this module in the app
DevPath is a hands-on course: you read the theory here; in the app you put it into practice with exercises that really run, offline.
Start free in the app →