14.1.0 • Published 11 days ago

mercurius v14.1.0

Weekly downloads
4,861
License
MIT
Repository
github
Last release
11 days ago

Mercurius Logo

mercurius

CI workflow

Mercurius is a GraphQL adapter for Fastify

Features:

  • Caching of query parsing and validation.
  • Automatic loader integration to avoid 1 + N queries.
  • Just-In-Time compiler via graphql-jit.
  • Subscriptions.
  • Federation support via @mercuriusjs/federation, including Subscriptions.
  • Gateway implementation via @mercuriusjs/gateway, including Subscriptions.
  • Batched query support.
  • Customisable persisted queries.

Docs

Install

npm i fastify mercurius graphql
# or
yarn add fastify mercurius graphql

The previous name of this module was fastify-gql (< 6.0.0).

Quick Start

'use strict'

const Fastify = require('fastify')
const mercurius = require('mercurius')

const app = Fastify()

const schema = `
  type Query {
    add(x: Int, y: Int): Int
  }
`

const resolvers = {
  Query: {
    add: async (_, { x, y }) => x + y
  }
}

app.register(mercurius, {
  schema,
  resolvers
})

app.get('/', async function (req, reply) {
  const query = '{ add(x: 2, y: 2) }'
  return reply.graphql(query)
})

app.listen({ port: 3000 })

Examples

Check GitHub repo for more examples.

Acknowledgements

The project is kindly sponsored by:

The Mercurius name was gracefully donated by Marco Castelluccio. The usage of that library was described in https://hacks.mozilla.org/2015/12/web-push-notifications-from-irssi/, and you can find that codebase in https://github.com/marco-c/mercurius.

License

MIT

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