├── .gitignore
├── README.md
├── client
    ├── .gitignore
    ├── package-lock.json
    ├── package.json
    ├── public
    │   ├── favicon.ico
    │   ├── index.html
    │   └── robots.txt
    ├── src
    │   ├── ApolloClient.js
    │   ├── App.css
    │   ├── App.js
    │   ├── App.test.js
    │   ├── components
    │   │   └── Home.js
    │   ├── index.css
    │   ├── index.js
    │   ├── logo.svg
    │   └── serviceWorker.js
    └── yarn.lock
├── graphiql.gif
├── graphql-meetup-tweet.png
├── package-lock.json
├── package.json
├── schema.js
└── server.js


/.gitignore:
--------------------------------------------------------------------------------
 1 | .idea
 2 | *.log
 3 | npm-debug.log
 4 | yarn-error.log
 5 | .DS_Store
 6 | build
 7 | node_modules
 8 | dist
 9 | .cache
10 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # GraphQL React Application
 2 | 
 3 | ## Description :clipboard:
 4 | > A GraphQL workshop to learn GraphQL implementations in JavaScript
 5 | 
 6 | ## GraphQL App DEMO :video_camera:
 7 | 
 8 | ## Built With :zap:
 9 | 1. GraphQL
10 | 2. React
11 | 3. Apollo Client
12 | 4. External dependency [wp-graphql](https://github.com/wp-graphql/wp-graphql) ( for `graphql-with-wordpress` branch )
13 | 5. Express
14 | 6. Node js
15 | 7. create-react-app ( uses Babel and Webpack )
16 | 
17 | ## Details :scroll:
18 | 
19 | 1. :arrow_right: We have set up our backend server in node and express app ( `localhost:5000/graphql` ) in `server.js`.
20 | 2. :arrow_right: React application is set up using [create-react-app](https://github.com/facebook/create-react-app) ( that runs webpack-dev-server for the frontend on `localhost:3000` )
21 | 3. :arrow_right: The schema and graphQl queries are created in `schema.js`
22 | 4. :arrow_right: We have used [wp-graphql](https://github.com/wp-graphql/wp-graphql) WordPress plugin that brings the power of GraphQL to WordPress. 
23 | 5. :arrow_right: GraphiQL playground is available on `localhost:5000/graphql`.
24 | 6. :arrow_right: We have used Apollo Client to build UI in React that fetches data from GraphQL. Apollo client help us create a query and binds our React component with the query, so that when component renders, and handles any queries to GraphQl server and return the results.
25 | 7. :arrow_right: We import `<Apolloclient>` from `apollo-boost` and create a new object called `client` and pass the url for our GraphQL endpoint into this object.
26 | 8. :arrow_right: We wrap our main React Component `<AppoloProvider>` and apollo `client` is then passed to these components, so that the results of your query can be passed to your components.
27 | 9. :arrow_right: The `graphql-tag` ( graphQl query parsing utility ) is installed and `gpl` is imported from it. The `gpl` parses GraphQL query strings into the standard GraphQL AST.
28 | 10. :arrow_right: Use `gpl` to query the data in front react app, from the schema we have create in our node application in backend.
29 | 11. :arrow_right: We have displayed all the data received as response of the query on home page( `Home.js` ).
30 | 
31 | ## GraphiQL Playground DEMO :video_camera:
32 | ![](graphiql.gif)
33 | 
34 | 
35 | ## Installation :wrench:
36 | 
37 | 1. Clone this repo by running `git clone https://github.com/imranhsayed/graphql-workshop`
38 | 2. `npm install`
39 | 3. `npm run dev`
40 | 
41 | ## Branches Information:
42 | 
43 | 1. * [master](https://github.com/imranhsayed/graphql-workshop) Creates a GraphQL server using express and nodejs and adds an endpoint at `localhost:5000/graphql`, where you can send all your query request.
44 |    * It has Apollo client with React on front end .
45 | 2. [graphql-with-wordpress](https://github.com/imranhsayed/graphql-workshop/tree/graphql-with-wordpress) uses GraphQL server created by [wp-graphql](https://github.com/wp-graphql/wp-graphql) plugin on your WordPress install and React in frontend. More info is in that branch's read me.
46 | 
47 | 
48 | 
49 | ## Plugins for GraphQL with WordPress :electric_plug:
50 | 
51 | For `graphql-with-wordpress` branch Clone these repositories into plugin directory of your WordPress Install and activate them from WordPress dashboard.
52 | 
53 | 1. [wp-graphql](https://github.com/wp-graphql/wp-graphql)
54 | 2. [wp-graphiql](https://github.com/wp-graphql/wp-graphiql)
55 | 
56 | ## Instructions :point_right:
57 | 
58 | * `Graphiql` is a tool that we can use as a client to make request to our server.
59 | * Graph QL endpoint where you can send your query request: `localhost:5000/graphql`
60 | 
61 | ## Common Commands :computer:
62 | 
63 | You can run these commands from root directory.
64 | 
65 | 1. `npm run dev` runs webpack-dev-server for frontend on port 3000 in watch mode and backend server on port 5000. ( Uses concurrently package to run the two servers together,
66 |  so the below two command are not required to run if you run this ).
67 | 2. `npm run dev:client` starts webpack dev server for React on port `5000`
68 | 3. `npm run dev:server` starts nodejs server on port `3000`
69 | 4. `npm run prod:client` runs the build for production for client.
70 | 
71 | ## Useful Links :link:
72 | 
73 | 1. [Express GraphQL github link](https://github.com/graphql/express-graphql)
74 | 2. [Apollo GraphQL](https://www.apollographql.com/docs/react/) 
75 | 
76 | Apollo Client is way to use GraphQL to build client applications. It helps you build a UI that fetches data with GraphQL, and can be used with any JavaScript front-end.
77 | When two components need the same data. If an action triggers an update on update, the second one won’t be updated . Apollo solves this using `reactive cache` feature.
78 | Its main job is fetch some GraphQL queries and keep them in sync with one another
79 | 
80 | ## Thank you Note 🙏 
81 | 
82 | I would like to thank 🙏 everyone who attended the [GraphQL with React and WordPress Meet](https://www.meetup.com/Pune-WordPress-Knowledge-Exchange/events/264252479/) up on Sep 21, 2019.
83 | The session wouldn't have been so enjoyable and fruitful without your presence.😊 
84 | 
85 | 📹[MeetUp Highlights](http://bit.ly/2kXSGJF)
86 | 
87 | 📷[Twitter Post with Snaps](https://twitter.com/imranhsayed/status/1175398297579638785?s=20)
88 | 
89 | ![](graphql-meetup-tweet.png)
90 | 
91 | ## License
92 | 
93 | [![License](http://img.shields.io/:license-mit-blue.svg?style=flat-square)](http://badges.mit-license.org)
94 | 
95 | - **[MIT license](http://opensource.org/licenses/mit-license.php)**
96 | 


--------------------------------------------------------------------------------
/client/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


--------------------------------------------------------------------------------
/client/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "client",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@apollo/react-hooks": "^3.1.1",
 7 |     "@babel/runtime": "^7.6.0",
 8 |     "apollo-boost": "^0.4.4",
 9 |     "graphql": "^14.5.6",
10 |     "react": "^16.9.0",
11 |     "react-dom": "^16.9.0",
12 |     "react-scripts": "5.0.1"
13 |   },
14 |   "scripts": {
15 |     "start": "react-scripts start",
16 |     "build": "react-scripts build",
17 |     "test": "react-scripts test",
18 |     "eject": "react-scripts eject"
19 |   },
20 |   "eslintConfig": {
21 |     "extends": "react-app"
22 |   },
23 |   "browserslist": {
24 |     "production": [
25 |       ">0.2%",
26 |       "not dead",
27 |       "not op_mini all"
28 |     ],
29 |     "development": [
30 |       "last 1 chrome version",
31 |       "last 1 firefox version",
32 |       "last 1 safari version"
33 |     ]
34 |   }
35 | }
36 | 


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/client/public/favicon.ico:
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https://raw.githubusercontent.com/imranhsayed/graphql-workshop/8a1479b01650038bd1603b6ee9d0d0f7f5a96f57/client/public/favicon.ico


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/client/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 7 |     <meta name="theme-color" content="#000000" />
 8 |     <meta
 9 |       name="description"
10 |       content="Web site created using create-react-app"
11 |     />
12 | 	  <title>GraphQL Workshop</title>
13 | 	  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
14 |     <!--
15 |       manifest.json provides metadata used when your web app is installed on a
16 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
17 |     -->
18 |     <!--
19 |       Notice the use of %PUBLIC_URL% in the tags above.
20 |       It will be replaced with the URL of the `public` folder during the build.
21 |       Only files inside the `public` folder can be referenced from the HTML.
22 | 
23 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
24 |       work correctly both with client-side routing and a non-root public URL.
25 |       Learn how to configure a non-root public URL by running `npm run build`.
26 |     -->
27 |     <title>React App</title>
28 |   </head>
29 |   <body>
30 |     <noscript>You need to enable JavaScript to run this app.</noscript>
31 |     <div id="root"></div>
32 |   </body>
33 | </html>
34 | 


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/client/public/robots.txt:
--------------------------------------------------------------------------------
1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | 


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/client/src/ApolloClient.js:
--------------------------------------------------------------------------------
1 | import ApolloClient from 'apollo-boost';
2 | 
3 | const client = new ApolloClient({
4 | 	uri: 'http://localhost:5000/graphql',
5 | });
6 | 
7 | export default client;
8 | 


--------------------------------------------------------------------------------
/client/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   animation: App-logo-spin infinite 20s linear;
 7 |   height: 40vmin;
 8 |   pointer-events: none;
 9 | }
10 | 
11 | .App-header {
12 |   background-color: #282c34;
13 |   min-height: 100vh;
14 |   display: flex;
15 |   flex-direction: column;
16 |   align-items: center;
17 |   justify-content: center;
18 |   font-size: calc(10px + 2vmin);
19 |   color: white;
20 | }
21 | 
22 | .App-link {
23 |   color: #61dafb;
24 | }
25 | 
26 | @keyframes App-logo-spin {
27 |   from {
28 |     transform: rotate(0deg);
29 |   }
30 |   to {
31 |     transform: rotate(360deg);
32 |   }
33 | }
34 | 


--------------------------------------------------------------------------------
/client/src/App.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import './App.css';
 3 | 
 4 | import client from './ApolloClient';
 5 | import { ApolloProvider } from '@apollo/react-hooks';
 6 | import { Home } from "./components/Home";
 7 | 
 8 | 
 9 | const App = () =>  (
10 | 	<ApolloProvider client={ client }>
11 | 		<Home/>
12 | 	</ApolloProvider>
13 | );
14 | 
15 | export default App;
16 | 


--------------------------------------------------------------------------------
/client/src/App.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import App from './App';
 4 | 
 5 | it('renders without crashing', () => {
 6 |   const div = document.createElement('div');
 7 |   ReactDOM.render(<App />, div);
 8 |   ReactDOM.unmountComponentAtNode(div);
 9 | });
10 | 


--------------------------------------------------------------------------------
/client/src/components/Home.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import { useQuery } from "@apollo/react-hooks";
 3 | import { gql } from "apollo-boost";
 4 | 
 5 | 
 6 | const postQuery = gql`
 7 | {
 8 | 	post( id: "1" ) {
 9 | 		title
10 |         content
11 |   }
12 | }
13 | `;
14 | 
15 | export const Home = () => {
16 | 	const { loading, error, data } = useQuery( postQuery );
17 | 
18 | 	if ( loading ) {
19 | 		return <p>Loading...</p>
20 | 	}
21 | 	if ( error ) {
22 | 		return <p>Error</p>
23 | 	}
24 | 	return (
25 | 			<div className="card border-primary m-5" style={{ maxWidth: '20rem' }}>
26 | 				<div className="card-header">{ data.post.title }</div>
27 | 				<div className="card-body">
28 | 					<p className="card-text">{ data.post.content }</p>
29 | 				</div>
30 | 			</div>
31 | 	)
32 | };
33 | 


--------------------------------------------------------------------------------
/client/src/index.css:
--------------------------------------------------------------------------------
 1 | body {
 2 |   margin: 0;
 3 |   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
 4 |     "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
 5 |     sans-serif;
 6 |   -webkit-font-smoothing: antialiased;
 7 |   -moz-osx-font-smoothing: grayscale;
 8 | }
 9 | 
10 | code {
11 |   font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
12 |     monospace;
13 | }
14 | 


--------------------------------------------------------------------------------
/client/src/index.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import ReactDOM from 'react-dom';
3 | import './index.css';
4 | import App from './App';
5 | 
6 | ReactDOM.render(<App />, document.getElementById('root'));
7 | 


--------------------------------------------------------------------------------
/client/src/logo.svg:
--------------------------------------------------------------------------------
1 | <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
2 |     <g fill="#61DAFB">
3 |         <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
4 |         <circle cx="420.9" cy="296.5" r="45.7"/>
5 |         <path d="M520.5 78.1z"/>
6 |     </g>
7 | </svg>
8 | 


--------------------------------------------------------------------------------
/client/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // This optional code is used to register a service worker.
  2 | // register() is not called by default.
  3 | 
  4 | // This lets the app load faster on subsequent visits in production, and gives
  5 | // it offline capabilities. However, it also means that developers (and users)
  6 | // will only see deployed updates on subsequent visits to a page, after all the
  7 | // existing tabs open on the page have been closed, since previously cached
  8 | // resources are updated in the background.
  9 | 
 10 | // To learn more about the benefits of this model and instructions on how to
 11 | // opt-in, read https://bit.ly/CRA-PWA
 12 | 
 13 | const isLocalhost = Boolean(
 14 |   window.location.hostname === 'localhost' ||
 15 |     // [::1] is the IPv6 localhost address.
 16 |     window.location.hostname === '[::1]' ||
 17 |     // 127.0.0.1/8 is considered localhost for IPv4.
 18 |     window.location.hostname.match(
 19 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 20 |     )
 21 | );
 22 | 
 23 | export function register(config) {
 24 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 25 |     // The URL constructor is available in all browsers that support SW.
 26 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
 27 |     if (publicUrl.origin !== window.location.origin) {
 28 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 29 |       // from what our page is served on. This might happen if a CDN is used to
 30 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 31 |       return;
 32 |     }
 33 | 
 34 |     window.addEventListener('load', () => {
 35 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 36 | 
 37 |       if (isLocalhost) {
 38 |         // This is running on localhost. Let's check if a service worker still exists or not.
 39 |         checkValidServiceWorker(swUrl, config);
 40 | 
 41 |         // Add some additional logging to localhost, pointing developers to the
 42 |         // service worker/PWA documentation.
 43 |         navigator.serviceWorker.ready.then(() => {
 44 |           console.log(
 45 |             'This web app is being served cache-first by a service ' +
 46 |               'worker. To learn more, visit https://bit.ly/CRA-PWA'
 47 |           );
 48 |         });
 49 |       } else {
 50 |         // Is not localhost. Just register service worker
 51 |         registerValidSW(swUrl, config);
 52 |       }
 53 |     });
 54 |   }
 55 | }
 56 | 
 57 | function registerValidSW(swUrl, config) {
 58 |   navigator.serviceWorker
 59 |     .register(swUrl)
 60 |     .then(registration => {
 61 |       registration.onupdatefound = () => {
 62 |         const installingWorker = registration.installing;
 63 |         if (installingWorker == null) {
 64 |           return;
 65 |         }
 66 |         installingWorker.onstatechange = () => {
 67 |           if (installingWorker.state === 'installed') {
 68 |             if (navigator.serviceWorker.controller) {
 69 |               // At this point, the updated precached content has been fetched,
 70 |               // but the previous service worker will still serve the older
 71 |               // content until all client tabs are closed.
 72 |               console.log(
 73 |                 'New content is available and will be used when all ' +
 74 |                   'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
 75 |               );
 76 | 
 77 |               // Execute callback
 78 |               if (config && config.onUpdate) {
 79 |                 config.onUpdate(registration);
 80 |               }
 81 |             } else {
 82 |               // At this point, everything has been precached.
 83 |               // It's the perfect time to display a
 84 |               // "Content is cached for offline use." message.
 85 |               console.log('Content is cached for offline use.');
 86 | 
 87 |               // Execute callback
 88 |               if (config && config.onSuccess) {
 89 |                 config.onSuccess(registration);
 90 |               }
 91 |             }
 92 |           }
 93 |         };
 94 |       };
 95 |     })
 96 |     .catch(error => {
 97 |       console.error('Error during service worker registration:', error);
 98 |     });
 99 | }
100 | 
101 | function checkValidServiceWorker(swUrl, config) {
102 |   // Check if the service worker can be found. If it can't reload the page.
103 |   fetch(swUrl)
104 |     .then(response => {
105 |       // Ensure service worker exists, and that we really are getting a JS file.
106 |       const contentType = response.headers.get('content-type');
107 |       if (
108 |         response.status === 404 ||
109 |         (contentType != null && contentType.indexOf('javascript') === -1)
110 |       ) {
111 |         // No service worker found. Probably a different app. Reload the page.
112 |         navigator.serviceWorker.ready.then(registration => {
113 |           registration.unregister().then(() => {
114 |             window.location.reload();
115 |           });
116 |         });
117 |       } else {
118 |         // Service worker found. Proceed as normal.
119 |         registerValidSW(swUrl, config);
120 |       }
121 |     })
122 |     .catch(() => {
123 |       console.log(
124 |         'No internet connection found. App is running in offline mode.'
125 |       );
126 |     });
127 | }
128 | 
129 | export function unregister() {
130 |   if ('serviceWorker' in navigator) {
131 |     navigator.serviceWorker.ready.then(registration => {
132 |       registration.unregister();
133 |     });
134 |   }
135 | }
136 | 


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/graphiql.gif:
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https://raw.githubusercontent.com/imranhsayed/graphql-workshop/8a1479b01650038bd1603b6ee9d0d0f7f5a96f57/graphiql.gif


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/graphql-meetup-tweet.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/imranhsayed/graphql-workshop/8a1479b01650038bd1603b6ee9d0d0f7f5a96f57/graphql-meetup-tweet.png


--------------------------------------------------------------------------------
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1137 |       }
1138 |     }
1139 |   }
1140 | }
1141 | 


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/package.json:
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 1 | {
 2 |   "name": "graphql-workshop",
 3 |   "version": "1.0.0",
 4 |   "description": "A GraphQL workshop to learn GraphQL implementations in JavaScript",
 5 |   "main": "server.js",
 6 |   "scripts": {
 7 |     "dev:client": "npm start --prefix client",
 8 |     "prod:client": "npm run build --prefix client",
 9 |     "dev:server": "nodemon server.js",
10 |     "dev": "concurrently \"npm run dev:server \" \"npm run dev:client\" "
11 |   },
12 |   "keywords": [
13 |     "GraphQL",
14 |     "JavaScript",
15 |     "React",
16 |     "WordPress",
17 |     "Apollo",
18 |     "Client",
19 |     "Express"
20 |   ],
21 |   "author": "Imran Sayed",
22 |   "license": "MIT",
23 |   "dependencies": {
24 |     "cors": "^2.8.5",
25 |     "express": "^4.17.1",
26 |     "express-graphql": "^0.9.0",
27 |     "graphql": "^14.5.5"
28 |   },
29 |   "devDependencies": {
30 |     "concurrently": "^4.1.2"
31 |   }
32 | }
33 | 


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/schema.js:
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 1 | const graphql = require( 'graphql' );
 2 | 
 3 | const {
 4 | 	      GraphQLObjectType,
 5 | 	      GraphQLString,
 6 | 	      GraphQLSchema
 7 |       } = graphql;
 8 | 
 9 | // Dummy Data
10 | const posts = [
11 | 	{ id: '1', title: 'Lord of the Rings', content: 'Awesome book' },
12 | 	{ id: '2', title: 'Avengers', content: 'Awesome movie' },
13 | 	{ id: '3', title: 'Harry Potter', content: 'Awesome book' },
14 | ];
15 | 
16 | // Define an object type called 'PostType'.
17 | const PostType = new GraphQLObjectType({
18 | 	name: 'Post',
19 | 	fields: () => ({
20 | 		id: { type: GraphQLString },
21 | 		title: { type: GraphQLString },
22 | 		content: { type: GraphQLString }
23 | 	})
24 | });
25 | 
26 | // Define RootQuery
27 | const RootQuery = new GraphQLObjectType({
28 | 	name: 'RootQueryType',
29 | 	fields: {
30 | 		post: {
31 | 			type: PostType,
32 | 			args: { id: { type: GraphQLString } },
33 | 			resolve( parent, args ) {
34 | 				// Get the data.
35 | 				return posts.find( post => ( post.id === args.id ) );
36 | 			}
37 | 		}
38 | 	}
39 | });
40 | 
41 | module.exports = new GraphQLSchema({
42 | 	query: RootQuery
43 | }) ;
44 | 


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/server.js:
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 1 | const express = require( 'express' );
 2 | var cors = require('cors');
 3 | 
 4 | const graphqlHTTP = require( 'express-graphql' );
 5 | 
 6 | const schema = require( './schema' );
 7 | 
 8 | const app = express();
 9 | app.use( cors() );
10 | 
11 | // Add the graphqlHTTP() middleware, to interact with GraphQL
12 | app.use( '/graphql', graphqlHTTP({
13 | 	schema,
14 | 	graphiql: true
15 | }) );
16 | 
17 | app.listen( 5000, () => {
18 | 	console.warn( 'Listening on port 5000' );
19 | } );
20 | 


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