Some extraction utility for Graphql.js

graphql-extract.js

import { isListType } from 'graphql/type/definition.mjs'

const extract_is_list = type =>
  isListType(type) || 
  isListType(type?.ofType)

const extract_type = type => type.ofType 
  ? extract_type(type.ofType)
  : type

const node_selections = node => node
             ?.selectionSet
             ?.selections
             ?? []

const extract_fields = infos => node_selections(infos?.fieldNodes?.[0])
  .flatMap(({ kind, name: { value } }) => kind === 'FragmentSpread'
      ? node_selections(infos?.fragments?.[value])
      : value)

export { extract_is_list, extract_type, extract_fields }

package.json

{
  "name": "graphql-extract",
  "version": "0.1.0",
  "type": "module",
  "main": "graphql-extract.js"
}