This is a custom ApolloLink which we use to clean the "__typename" field to prevent sending it to the GraphQL server. omitDeep based on this gist: https://gist.github.com/Billy-/d94b65998501736bfe6521eadc1ab538

cleanTypenameFieldLink.ts

import { ApolloLink } from 'apollo-link';

export class CleanTypenameLink extends ApolloLink {
  request (operation, forward) {
    if (operation.variables) {
      operation.variables = omitDeep(operation.variables, '__typename');
    }
    return forward(operation);
  }
}

export const omitDeep = (obj, key) => {
  const keys = Object.keys(obj)
  const newObj = {}
  keys.forEach((i) => {
    if (i !== key) {
      const val = obj[i]
      if (Array.isArray(val)) newObj[i] = omitDeepArrayWalk(val, key)
      else if (typeof val === 'object' && val !== null) newObj[i] = omitDeep(val, key)
      else newObj[i] = val
    }
  })
  return newObj
}

export const omitDeepArrayWalk = (arr, key) => {
  return arr.map((val) => {
    if (Array.isArray(val)) return omitDeepArrayWalk(val, key)
    else if (typeof val === 'object') return omitDeep(val, key)
    return val
  })
}