Migration from Express GraphQL

GraphQL Yoga v2 documentation (superseded by v5): GraphQL Yoga is a fully-featured GraphQL Server with focus on easy setup, performance & great developer experience.

Installation

You can start by installing graphql-yoga package.

npm i @graphql-yoga/node

yarn add @graphql-yoga/node

pnpm add @graphql-yoga/node

bun add @graphql-yoga/node

Replace Express GraphQL’s Middleware

You should replace Express GraphQL’s middleware with GraphQL Yoga’s;

const express = require('express')
- const { graphqlHTTP } = require('express-graphql')
+ const { createServer } = require('@graphql-yoga/node')
const { schema } = require('./schema')

const app = express()

- app.use('/graphql', graphqlHTTP(req => ({
-   schema: schema,
-   context: {
-     token: req.headers.authorization
-   },
-   graphiql: true
- })))

+ const yoga = createServer({
+   schema,
+   context: (req) => ({ // Context factory gets called for every request
+     myToken: req.headers.get('authorization')
+   }),
+   graphiql: true
+ })
+
+ app.use('/graphql', yoga)

app.listen(4000)
console.log('Running a GraphQL API server at http://localhost:4000/graphql')