Autogenerate type-safe Elm code from any GraphQL schema for guaranteed valid queries and seamless decoders.
dillonkearns/elm-graphql is a tool that autogenerates type-safe Elm code from a GraphQL schema. It allows developers to write GraphQL queries in Elm that are guaranteed to be valid at compile time and automatically handles JSON decoding for API responses. This solves the problem of manual decoder writing and runtime errors when interacting with GraphQL APIs.
Elm developers building frontend applications that consume GraphQL APIs, particularly those who value type safety and want to eliminate runtime errors in their data fetching logic.
Developers choose elm-graphql because it is the only Elm GraphQL library that provides full type safety across the entire schema, generates decoders automatically, and integrates GraphQL concepts naturally into Elm's functional paradigm. Its compile-time guarantees reduce bugs and improve developer confidence.
Autogenerate type-safe GraphQL queries in Elm.
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Generates Elm code that ensures all GraphQL queries are valid according to the schema at compile time, eliminating runtime errors from malformed queries as emphasized in the README.
Seamlessly creates decoders for API responses without manual coding, reducing boilerplate and potential bugs, as demonstrated in the example code snippets.
Replaces GraphQL variables and fragments with standard Elm functions and constants, providing a simpler, more idiomatic developer experience within Elm's functional paradigm.
Generates ready-to-use Elm code for GraphQL Subscriptions, facilitating real-time updates when combined with WebSocket ports, as shown in the live demo and examples.
Requires custom JavaScript code and Elm ports to handle WebSocket connections for subscriptions, as the library does not manage low-level transport details, adding complexity.
Adds a build step with the CLI tool that must be run whenever the GraphQL schema changes, increasing setup and maintenance effort compared to runtime GraphQL clients.
Queries are constructed statically in Elm code, making it difficult to dynamically generate or modify queries at runtime, which can limit flexibility for interactive applications.