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GraphQL (Apollo Client)

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description GraphQL (Apollo Client) Overview

GraphQL is a query language for APIs, not a platform itself, but its client libraries (like Apollo) are designed to be consumed cross-platform by web, mobile, and desktop clients. It solves the over-fetching/under-fetching problem inherent in REST. Its adoption is growing rapidly because it gives clients precise control over the data they receive, making the client implementation highly portable across different frontends.

help GraphQL (Apollo Client) FAQ

What problem does Apollo Client solve in a GraphQL application?

Apollo Client sends GraphQL operations, normalizes returned objects into a local cache, and updates subscribed UI components when that data changes. It also provides tools for pagination, optimistic updates, polling, and error handling.

Can Apollo Client be used without an Apollo GraphQL server?

Yes, Apollo Client can communicate with any server that implements the GraphQL specification. The backend might use Apollo Server, GraphQL Yoga, Hasura, or a framework-specific GraphQL implementation.

Does GraphQL eliminate over-fetching compared with REST?

GraphQL lets a client request specific fields, which can reduce unnecessary response data and combine related resources into one operation. It does not automatically make an API faster, because expensive resolvers, repeated database queries, and poorly designed schemas can still create bottlenecks.

Can Apollo Client be used in React Native and mobile apps?

Apollo Client is a JavaScript client and works with React Native as well as browser frameworks such as React. Native iOS and Android projects can instead use platform-specific GraphQL clients, including Apollo iOS and Apollo Kotlin.

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