@loopback/docs

--- lang: en title: 'API docs: graphql' keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI sidebar: lb4_sidebar editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/graphql permalink: /doc/en/lb4/apidocs.graphql.html ---  [Home](./index.md) > [@loopback/graphql](./graphql.md) ## graphql package [@loopback/graphql](https://github.com/loopbackio/loopback-next/tree/master/extensions/graphql) ## Classes <table><thead><tr><th> Class </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [GraphQLComponent](./graphql.graphqlcomponent.md) </td><td markdown="1"> Component for GraphQL </td></tr> <tr><td markdown="1"> [GraphQLResolutionContext](./graphql.graphqlresolutioncontext.md) </td><td markdown="1"> Context for graphql resolver resolution </td></tr> <tr><td markdown="1"> [GraphQLServer](./graphql.graphqlserver.md) </td><td markdown="1"> GraphQL Server </td></tr> <tr><td markdown="1"> [LoopBackContainer](./graphql.loopbackcontainer.md) </td><td markdown="1"> Implementation of `ContainerType` to plug into `type-graphql` as the IoC container </td></tr> </tbody></table> ## Functions <table><thead><tr><th> Function </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [registerResolver(ctx, resolverClass, nameOrOptions)](./graphql.registerresolver.md) </td><td markdown="1"> Register a GraphQL resolver class </td></tr> </tbody></table> ## Interfaces <table><thead><tr><th> Interface </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [GraphQLComponentOptions](./graphql.graphqlcomponentoptions.md) </td><td markdown="1"> Options for GraphQL component </td></tr> <tr><td markdown="1"> [GraphQLServerOptions](./graphql.graphqlserveroptions.md) </td><td markdown="1"> Options for GraphQL server </td></tr> </tbody></table> ## Namespaces <table><thead><tr><th> Namespace </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [GraphQLBindings](./graphql.graphqlbindings.md) </td><td markdown="1"> Namespace for GraphQL related bindings </td></tr> <tr><td markdown="1"> [GraphQLTags](./graphql.graphqltags.md) </td><td markdown="1"> Namespace for GraphQL related tags </td></tr> </tbody></table> ## Variables <table><thead><tr><th> Variable </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [arg](./graphql.arg.md) </td><td markdown="1"> Re-exporting type-graphql decorators as lower case versions for two purposes: - To be consistent with LoopBack's naming convention of decorators - Allow future possibility to add extra metadata in addition to type-graphql's behavior, for example, mapping to LoopBack model properties </td></tr> <tr><td markdown="1"> [args](./graphql.args.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [argsType](./graphql.argstype.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [authorized](./graphql.authorized.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [field](./graphql.field.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [fieldResolver](./graphql.fieldresolver.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [inputType](./graphql.inputtype.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [mutation](./graphql.mutation.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [objectType](./graphql.objecttype.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [query](./graphql.query.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [resolver](./graphql.resolver.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [root](./graphql.root.md) </td><td markdown="1"> </td></tr> <tr><td markdown="1"> [subscription](./graphql.subscription.md) </td><td markdown="1"> </td></tr> </tbody></table> ## Type Aliases <table><thead><tr><th> Type Alias </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [GraphQLWsContextResolver](./graphql.graphqlwscontextresolver.md) </td><td markdown="1"> </td></tr> </tbody></table>