relay-local-schema

Use Relay without a GraphQL server.
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Usage

import { Environment } from 'react-relay';
import { Network } from 'relay-local-schema';

import schema from './data/schema';

const environment = new Environment({
  network: Network.create({ schema }),
  /* ... */
});

This will execute queries against the specified schema locally, rather than against a separate GraphQL server.
You can also specify a GraphQL.js rootValue or contextValue:

const environment = new Environment({
  network: Network.create({
    schema,
    rootValue: 'foo',
    contextValue: 'bar',
  }),
  /* ... */
});

For more control over the network layer, you can use createFetch to create just the fetch function.

import { Environment, Network } from 'react-relay';
import { createFetch } from 'relay-local-schema';

import schema from './data/schema';

const environment = new Environment({
  network: Network.create(createFetch({ schema })),
  /* ... */
});

Caveat

This is intended for exploratory work, integration tests, demos, and working with local data. This is not generally intended as a substitute for a remote GraphQL back end in production.