GraphQL SSE subscriptions Example

const schema = `
schema {
  query: Query
  subscription: Subscription
}

type Query {
  hello: String
}

type Subscription {
  greetings: String
}
`;

const greetings = introspect.graphql({
  apiNamespace: 'sse',
  url: 'http://localhost:4000/graphql/stream',
  loadSchemaFromString: schema,
  subscriptionsUseSSE: true,
});

npm install && npm start

curl -N http://localhost:9991/operations/Sse

 curl -N http://localhost:9991/operations/Sse\?wg_sse\=true