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JSON Server and db.json: A Beginner's Guide to Mock Servers in Frontend Dev

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Frontend developers often face a common challenge: building UI components that depend on an API before the backend is ready. A Mock Server solves this by simulating a real API, receiving HTTP requests and returning predefined responses during development. JSON Server is a popular tool that converts a simple JSON file, known as db.json, into a functional REST API. This allows frontend teams to continue building and testing features independently, without waiting for backend completion. The article distinguishes between Mock Data, which represents fictional data, and a Mock Server, which actively serves that data over HTTP.

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