SchemaLink - Apollo Client

Constructor signature

constructor(
  options: SchemaLink.Options
): SchemaLink

Usage examples

Server Side Rendering

When performing SSR on the same server, you can use this library to avoid making network calls.

import { ApolloClient, InMemoryCache } from "@apollo/client";
import { SchemaLink } from "@apollo/client/link/schema";

import schema from "./path/to/your/schema";

const graphqlClient = new ApolloClient({
  cache: new InMemoryCache(),
  ssrMode: true,
  link: new SchemaLink({ schema }),
});

Mocking

For more detailed information about mocking, refer to the graphql-tools documentation.

import { ApolloClient, InMemoryCache } from '@apollo/client';
import { SchemaLink } from '@apollo/client/link/schema';
import { makeExecutableSchema, addMockFunctionsToSchema } from 'graphql-tools';

const typeDefs = `
  Query {
  ...
  }
`;

const mocks = {
  Query: () => ...,
  Mutation: () => ...
};

const schema = makeExecutableSchema({ typeDefs });
const schemaWithMocks = addMockFunctionsToSchema({
  schema,
  mocks
});

const apolloCache = new InMemoryCache(window.__APOLLO_STATE__);

const graphqlClient = new ApolloClient({
  cache: apolloCache,
  link: new SchemaLink({ schema: schemaWithMocks })
});

Types

`SchemaLink.ResolverContext`

Signature

type ResolverContext = Record<string, any>;