November 10, 2018

849 words 4 mins read



Represent any GraphQL API as an interactive graph

repo name APIs-guru/graphql-voyager
repo link
language TypeScript
size (curr.) 11260 kB
stars (curr.) 4743
created 2016-11-29
license MIT License

GraphQL Voyager

jsDelivr David David License: MIT

graphql-voyager logo

Represent any GraphQL API as an interactive graph. It’s time to finally see the graph behind GraphQL. You can also explore number of public GraphQL APIs from our list.

With graphql-voyager you can visually explore your GraphQL API as an interactive graph. This is a great tool when designing or discussing your data model. It includes multiple example GraphQL schemas and also allows you to connect it to your own GraphQL endpoint. What are you waiting for, explore your API!

GraphQL Weekly #42

Live Demo

voyager demo


  • Quick navigation on graph
  • Left panel which provides more detailed information about every type
  • “Skip Relay” option that simplifies graph by removing Relay wrapper classes
  • Ability to choose any type to be a root of the graph


GraphQL Voyager exports Voyager React component and helper init function. If used without module system it is exported as GraphQLVoyager global variable.


Voyager component accepts the following properties:

  • introspection [object or function: (query: string) => Promise] - the server introspection response. If function is provided GraphQL Voyager will pass introspection query as a first function parameter. Function should return Promise which resolves to introspection response object.
  • displayOptions (optional)
    • displayOptions.skipRelay [boolean, default true] - skip relay-related entities
    • displayOptions.skipDeprecated [boolean, default true] - skip deprecated fields and entities that contain only deprecated fields.
    • displayOptions.rootType [string] - name of the type to be used as a root
    • displayOptions.sortByAlphabet [boolean, default false] - sort fields on graph by alphabet
    • displayOptions.showLeafFields [boolean, default true] - show all scalars and enums
    • displayOptions.hideRoot [boolean, default false] - hide the root type
  • hideDocs [boolean, default false] - hide the docs sidebar
  • hideSettings [boolean, default false] - hide settings panel
  • workerURI [string] (optional) - absolute or relative path to Voyager web worker. By default it will try to load it from voyager.worker.js.
  • loadWorker [function: (path: string, relative: boolean) => Promise<Worker>] (optional) - If provided GraphQL Voyager will use this function to load the worker. By default it will use the internal callback in utils/index.ts

init function

The signature of the init function:

(hostElement: HTMLElement, options: object) => void
  • hostElement - parent element
  • options - is the JS object with properties of Voyager component

Using pre-bundled version

You can get GraphQL Voyager bundle from the following places:

Important: for the latest two options make sure to copy voyager.worker.js to the same folder as voyager.min.js.

The HTML with minimal setup (see the full example)

<!DOCTYPE html>
    <script src=""></script>
    <script src=""></script>

    <link rel="stylesheet" href="" />
    <script src=""></script>
    <div id="voyager">Loading...</div>
      function introspectionProvider(introspectionQuery) {
        // ... do a call to server using introspectionQuery provided
        // or just return pre-fetched introspection

      // Render <Voyager />
      GraphQLVoyager.init(document.getElementById('voyager'), {
        introspection: introspectionProvider

Using as a dependency

You can install lib using npm or yarn:

npm i --save graphql-voyager
yarn add graphql-voyager

And then use it:

import * as React from 'react';
import * as ReactDOM from 'react-dom';
import {Voyager} from 'graphql-voyager';
import fetch from 'isomorphic-fetch';

function introspectionProvider(query) {
  return fetch(window.location.origin + '/graphql', {
    method: 'post',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({query: query}),
  }).then(response => response.json());

ReactDOM.render(<Voyager introspection={introspectionProvider} />, document.getElementById('voyager'));

Build for the web with webpack (example) or browserify

Important: make sure to copy voyager.worker.js from node_modules/graphql-voyager/dist to the same folder as your main bundle or use workerURI property to specify other path.

NOTE if you use it with create-react-app, copy worker file to public folder and use workerURI property like this:

      // ...
      workerURI={process.env.PUBLIC_URL + '/voyager.worker.js'}
      // ...


Graphql Voyager has middleware for the next frameworks:


Middleware supports the following properties:

  • endpointUrl [string] - the GraphQL endpoint url.
  • displayOptions [object] - same as here
  • headersJS [string, default "{}"] - object of headers serialized in string to be used on endpoint url Note: You can also use any JS expression which results in an object with header names as keys and strings as values e.g. { Authorization: localStorage['Meteor.loginToken'] }


import express from 'express';
import { express as voyagerMiddleware } from 'graphql-voyager/middleware';

const app = express();

app.use('/voyager', voyagerMiddleware({ endpointUrl: '/graphql' }));



Version 17+

import hapi from 'hapi';
import { hapi as voyagerMiddleware } from 'graphql-voyager/middleware';

const server = new Hapi.Server({
  port: 3001

const init = async () => {
  await server.register({
    plugin: voyagerMiddleware,
    options: {
      path: '/voyager',
      endpointUrl: '/graphql'

  await server.start();


Legacy Versions

import hapi from 'hapi';
import { hapiLegacy as voyagerMiddleware } from 'graphql-voyager/middleware';

const server = new Hapi.Server();

  port: 3001

  register: voyagerMiddleware,
  options: {
    path: '/voyager',
    endpointUrl: '/graphql'
},() => server.start());


import Koa from 'koa';
import KoaRouter from 'koa-router';
import { koa as voyagerMiddleware } from 'graphql-voyager/middleware';

const app = new Koa();
const router = new KoaRouter();

router.all('/voyager', voyagerMiddleware({
  endpointUrl: '/graphql'



This tool is inspired by graphql-visualizer project.

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