Node 10 (using esm) error

index.js

import { GraphQLNonNull, GraphQLList, GraphQLBoolean } from 'graphql'
import { GraphQLUpload } from 'apollo-upload-server'
import resolve from './resolver'

export default {
  type: GraphQLBoolean,
  args: {
    files: {
      type: new GraphQLList(new GraphQLNonNull(GraphQLUpload))
    }
  },
  resolve
}

result

(node:20404) UnhandledPromiseRejectionWarning: file:///Users/macbook/WebstormProjects/project/node_modules/apollo-upload-server/lib/types.mjs:1
import { GraphQLScalarType } from 'graphql'

SyntaxError: Missing export name 'GraphQLScalarType' in ES module: file:///Users/macbook/WebstormProjects/project/node_modules/graphql/index.js
    at file:///Users/macbook/WebstormProjects/project/node_modules/apollo-upload-server/lib/types.mjs:1
(node:20404) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)

[mike-marcacci]

I’m going to guess this is a bug I noticed with babel 7 where destructuring imports is broken. To work around this, I believe we need to change our syntax to:

import * as graphql from 'graphql'
const { GraphQLScalarType } = graphql;

[jaydenseric]

@qertis The issue is your graphql version (v0.10.1) needs to be at least v0.13.1. That is the first version to have proper ESM named exports, .mjs, etc.