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This repository demonstrates how to configure CORS for an express.js-based GraphQL server. (This example uses apollo-server, but usage with express-graphql is equivalent.)

Read the full article here.

Get started

Clone the repository:

git clone

Start the server:

cd server
yarn install
yarn start

Start the frontend:

cd ../frontend
yarn install
yarn start

Test the app:

To test the app, simply open http://localhost:3000 in your browser. Note that you can provoke a CORS error by commenting out app.use(cors()) as described in the article.