The Fixed Contract Between Frontend and Backend
Explore how the fixed API contract defines interactions between frontend and backend by detailing endpoints, request and response formats, and status codes. Understand the guarantees this contract provides, enabling frontend engineers to build predictable interfaces before data arrives.
The frontend spends its life asking a server for things and building an interface around the answers. Those answers don't arrive as surprises. Both sides agree in advance on what a request looks like and what comes back, and that agreement is what makes the frontend's work possible at all.
We'll cover the following:
What an API contract is
The three parts of a contract
The status contract
What a contract guarantees
What an API contract is
An API contract is the agreed definition of how the client and server communicate: where to send a request, what to send with it, and how the answer will be organized.
The word "contract" is doing real work here. It's a ...