There are several key differences between GraphQL and REST APIs:
Data fetching: REST APIs have a fixed structure, and clients (users) can only request data that is available through the endpoint. In contrast, GraphQL allows clients to request exactly the data they need, and the server will only return that data.
Over-fetching and Under-fetching: In REST, Over-fetching occurs when a client requests more data than it needs, and Under-fetching occurs when a client needs to make multiple requests to get all the data it needs. GraphQL allows clients to request only the data they need, reducing over-fetching and under-fetching.
Endpoints: REST APIs have multiple endpoints for different resources, whereas GraphQL has a single endpoint for all resources.
Versioning: With REST, new versions of an API are released with new endpoints, whereas with GraphQL, the schema can evolve over time without requiring new endpoints.
Error handling: REST APIs are usually based on a standard HTTP status codes while GraphQL uses a more robust error handling mechanism, returning errors as part of the response.
Updated 15 days ago