├── public
    ├── favicon.ico
    ├── manifest.json
    └── index.html
├── netlify.toml
├── src
    ├── App.test.js
    ├── lambda
    │   ├── hello.js
    │   └── async-dadjoke.js
    ├── index.css
    ├── index.js
    ├── App.css
    ├── App.js
    ├── logo.svg
    └── serviceWorker.js
├── .gitignore
├── package.json
└── README.md


/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/VitorGuedesMadeira/Bookstore-React-Netlify/HEAD/public/favicon.ico


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/netlify.toml:
--------------------------------------------------------------------------------
1 | [build]
2 |   command = "yarn build" # the command you run to build this file
3 |   functions = "built-lambda" # netlify-lambda builds to this folder AND Netlify reads functions from here
4 |   publish = "build" # create-react-app builds to this folder, Netlify should serve all these files statically


--------------------------------------------------------------------------------
/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 | 


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/src/lambda/hello.js:
--------------------------------------------------------------------------------
1 | // this uses the callback syntax, however, we encourage you to try the async/await syntax shown in async-dadjoke.js
2 | export function handler(event, context, callback) {
3 |   console.log('queryStringParameters', event.queryStringParameters)
4 |   callback(null, {
5 |     statusCode: 200,
6 |     body: JSON.stringify({ msg: 'Hello, World!' }),
7 |   })
8 | }
9 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     }
10 |   ],
11 |   "start_url": "./index.html",
12 |   "display": "standalone",
13 |   "theme_color": "#000000",
14 |   "background_color": "#ffffff"
15 | }
16 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/ignore-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | 
 6 | # testing
 7 | /coverage
 8 | 
 9 | # production
10 | /build
11 | /built-lambda
12 | 
13 | /.netlify
14 | 
15 | # misc
16 | .DS_Store
17 | .env.local
18 | .env.development.local
19 | .env.test.local
20 | .env.production.local
21 | 
22 | npm-debug.log*
23 | yarn-debug.log*
24 | yarn-error.log*
25 | 


--------------------------------------------------------------------------------
/src/index.css:
--------------------------------------------------------------------------------
 1 | body {
 2 |   margin: 0;
 3 |   padding: 0;
 4 |   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
 5 |     'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
 6 |     sans-serif;
 7 |   -webkit-font-smoothing: antialiased;
 8 |   -moz-osx-font-smoothing: grayscale;
 9 | }
10 | 
11 | code {
12 |   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
13 |     monospace;
14 | }
15 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import './index.css';
 4 | import App from './App';
 5 | import * as serviceWorker from './serviceWorker';
 6 | 
 7 | ReactDOM.render(<App />, document.getElementById('root'));
 8 | 
 9 | // If you want your app to work offline and load faster, you can change
10 | // unregister() to register() below. Note this comes with some pitfalls.
11 | // Learn more about service workers: http://bit.ly/CRA-PWA
12 | serviceWorker.unregister();
13 | 


--------------------------------------------------------------------------------
/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 | }
 9 | 
10 | .App-header {
11 |   background-color: #282c34;
12 |   min-height: 100vh;
13 |   display: flex;
14 |   flex-direction: column;
15 |   align-items: center;
16 |   justify-content: center;
17 |   font-size: calc(10px + 2vmin);
18 |   color: white;
19 | }
20 | 
21 | .App-link {
22 |   color: #61dafb;
23 | }
24 | 
25 | @keyframes App-logo-spin {
26 |   from {
27 |     transform: rotate(0deg);
28 |   }
29 |   to {
30 |     transform: rotate(360deg);
31 |   }
32 | }
33 | 


--------------------------------------------------------------------------------
/src/lambda/async-dadjoke.js:
--------------------------------------------------------------------------------
 1 | // example of async handler using async-await
 2 | // https://github.com/netlify/netlify-lambda/issues/43#issuecomment-444618311
 3 | 
 4 | import axios from "axios"
 5 | export async function handler(event, context) {
 6 |   try {
 7 |     const response = await axios.get("https://icanhazdadjoke.com", { headers: { Accept: "application/json" } })
 8 |     const data = response.data
 9 |     return {
10 |       statusCode: 200,
11 |       body: JSON.stringify({ msg: data.joke })
12 |     }
13 |   } catch (err) {
14 |     console.log(err) // output to netlify function log
15 |     return {
16 |       statusCode: 500,
17 |       body: JSON.stringify({ msg: err.message }) // Could be a custom message or object i.e. JSON.stringify(err)
18 |     }
19 |   }
20 | }
21 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "create-react-app-lambda",
 3 |   "version": "0.5.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "axios": "^0.19.0",
 7 |     "react": "^16.8.6",
 8 |     "react-dom": "^16.8.6",
 9 |     "react-scripts": "^3.0.1"
10 |   },
11 |   "scripts": {
12 |     "start": "react-scripts start",
13 |     "start:lambda": "netlify-lambda serve src/lambda",
14 |     "build": "run-p build:**",
15 |     "build:app": "react-scripts build",
16 |     "build:lambda": "netlify-lambda build src/lambda",
17 |     "test": "react-scripts test",
18 |     "eject": "react-scripts eject"
19 |   },
20 |   "eslintConfig": {
21 |     "extends": "react-app"
22 |   },
23 |   "browserslist": [
24 |     ">0.2%",
25 |     "not dead",
26 |     "not ie <= 11",
27 |     "not op_mini all"
28 |   ],
29 |   "devDependencies": {
30 |     "netlify-lambda": "^1.4.5",
31 |     "npm-run-all": "^4.1.5"
32 |   }
33 | }
34 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
 1 | import React, { Component } from "react"
 2 | import logo from "./logo.svg"
 3 | import "./App.css"
 4 | 
 5 | class LambdaDemo extends Component {
 6 |   constructor(props) {
 7 |     super(props)
 8 |     this.state = { loading: false, msg: null }
 9 |   }
10 | 
11 |   handleClick = api => e => {
12 |     e.preventDefault()
13 | 
14 |     this.setState({ loading: true })
15 |     fetch("/.netlify/functions/" + api)
16 |       .then(response => response.json())
17 |       .then(json => this.setState({ loading: false, msg: json.msg }))
18 |   }
19 | 
20 |   render() {
21 |     const { loading, msg } = this.state
22 | 
23 |     return (
24 |       <p>
25 |         <button onClick={this.handleClick("hello")}>{loading ? "Loading..." : "Call Lambda"}</button>
26 |         <button onClick={this.handleClick("async-dadjoke")}>{loading ? "Loading..." : "Call Async Lambda"}</button>
27 |         <br />
28 |         <span>{msg}</span>
29 |       </p>
30 |     )
31 |   }
32 | }
33 | 
34 | class App extends Component {
35 |   render() {
36 |     return (
37 |       <div className="App">
38 |         <header className="App-header">
39 |           <img src={logo} className="App-logo" alt="logo" />
40 |           <p>
41 |             Edit <code>src/App.js</code> and save to reload.
42 |           </p>
43 |           <LambdaDemo />
44 |         </header>
45 |       </div>
46 |     )
47 |   }
48 | }
49 | 
50 | export default App
51 | 


--------------------------------------------------------------------------------
/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 6 |     <meta name="theme-color" content="#000000">
 7 |     <!--
 8 |       manifest.json provides metadata used when your web app is added to the
 9 |       homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
10 |     -->
11 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
12 |     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
13 |     <!--
14 |       Notice the use of %PUBLIC_URL% in the tags above.
15 |       It will be replaced with the URL of the `public` folder during the build.
16 |       Only files inside the `public` folder can be referenced from the HTML.
17 | 
18 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
19 |       work correctly both with client-side routing and a non-root public URL.
20 |       Learn how to configure a non-root public URL by running `npm run build`.
21 |     -->
22 |     <title>React App</title>
23 |   </head>
24 |   <body>
25 |     <noscript>
26 |       You need to enable JavaScript to run this app.
27 |     </noscript>
28 |     <div id="root"></div>
29 |     <!--
30 |       This HTML file is a template.
31 |       If you open it directly in the browser, you will see an empty page.
32 | 
33 |       You can add webfonts, meta tags, or analytics to this file.
34 |       The build step will place the bundled scripts into the <body> tag.
35 | 
36 |       To begin the development, run `npm start` or `yarn start`.
37 |       To create a production bundle, use `npm run build` or `yarn build`.
38 |     -->
39 |   </body>
40 | </html>
41 | 


--------------------------------------------------------------------------------
/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 | 


--------------------------------------------------------------------------------
/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // In production, we register a service worker to serve assets from local cache.
  2 | 
  3 | // This lets the app load faster on subsequent visits in production, and gives
  4 | // it offline capabilities. However, it also means that developers (and users)
  5 | // will only see deployed updates on the "N+1" visit to a page, since previously
  6 | // cached resources are updated in the background.
  7 | 
  8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
  9 | // This link also includes instructions on opting out of this behavior.
 10 | 
 11 | const isLocalhost = Boolean(
 12 |   window.location.hostname === 'localhost' ||
 13 |     // [::1] is the IPv6 localhost address.
 14 |     window.location.hostname === '[::1]' ||
 15 |     // 127.0.0.1/8 is considered localhost for IPv4.
 16 |     window.location.hostname.match(
 17 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 18 |     )
 19 | );
 20 | 
 21 | export function register(config) {
 22 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 23 |     // The URL constructor is available in all browsers that support SW.
 24 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
 25 |     if (publicUrl.origin !== window.location.origin) {
 26 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 27 |       // from what our page is served on. This might happen if a CDN is used to
 28 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 29 |       return;
 30 |     }
 31 | 
 32 |     window.addEventListener('load', () => {
 33 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 34 | 
 35 |       if (isLocalhost) {
 36 |         // This is running on localhost. Let's check if a service worker still exists or not.
 37 |         checkValidServiceWorker(swUrl, config);
 38 | 
 39 |         // Add some additional logging to localhost, pointing developers to the
 40 |         // service worker/PWA documentation.
 41 |         navigator.serviceWorker.ready.then(() => {
 42 |           console.log(
 43 |             'This web app is being served cache-first by a service ' +
 44 |               'worker. To learn more, visit https://goo.gl/SC7cgQ'
 45 |           );
 46 |         });
 47 |       } else {
 48 |         // Is not local host. Just register service worker
 49 |         registerValidSW(swUrl, config);
 50 |       }
 51 |     });
 52 |   }
 53 | }
 54 | 
 55 | function registerValidSW(swUrl, config) {
 56 |   navigator.serviceWorker
 57 |     .register(swUrl)
 58 |     .then(registration => {
 59 |       registration.onupdatefound = () => {
 60 |         const installingWorker = registration.installing;
 61 |         installingWorker.onstatechange = () => {
 62 |           if (installingWorker.state === 'installed') {
 63 |             if (navigator.serviceWorker.controller) {
 64 |               // At this point, the old content will have been purged and
 65 |               // the fresh content will have been added to the cache.
 66 |               // It's the perfect time to display a "New content is
 67 |               // available; please refresh." message in your web app.
 68 |               console.log('New content is available; please refresh.');
 69 | 
 70 |               // Execute callback
 71 |               if (config && config.onUpdate) {
 72 |                 config.onUpdate(registration);
 73 |               }
 74 |             } else {
 75 |               // At this point, everything has been precached.
 76 |               // It's the perfect time to display a
 77 |               // "Content is cached for offline use." message.
 78 |               console.log('Content is cached for offline use.');
 79 | 
 80 |               // Execute callback
 81 |               if (config && config.onSuccess) {
 82 |                 config.onSuccess(registration);
 83 |               }
 84 |             }
 85 |           }
 86 |         };
 87 |       };
 88 |     })
 89 |     .catch(error => {
 90 |       console.error('Error during service worker registration:', error);
 91 |     });
 92 | }
 93 | 
 94 | function checkValidServiceWorker(swUrl, config) {
 95 |   // Check if the service worker can be found. If it can't reload the page.
 96 |   fetch(swUrl)
 97 |     .then(response => {
 98 |       // Ensure service worker exists, and that we really are getting a JS file.
 99 |       if (
100 |         response.status === 404 ||
101 |         response.headers.get('content-type').indexOf('javascript') === -1
102 |       ) {
103 |         // No service worker found. Probably a different app. Reload the page.
104 |         navigator.serviceWorker.ready.then(registration => {
105 |           registration.unregister().then(() => {
106 |             window.location.reload();
107 |           });
108 |         });
109 |       } else {
110 |         // Service worker found. Proceed as normal.
111 |         registerValidSW(swUrl, config);
112 |       }
113 |     })
114 |     .catch(() => {
115 |       console.log(
116 |         'No internet connection found. App is running in offline mode.'
117 |       );
118 |     });
119 | }
120 | 
121 | export function unregister() {
122 |   if ('serviceWorker' in navigator) {
123 |     navigator.serviceWorker.ready.then(registration => {
124 |       registration.unregister();
125 |     });
126 |   }
127 | }
128 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | ## Create-React-App-Lambda
  2 | 
  3 | This project is a reference demo showing you how to use [Create React App v3](https://github.com/facebookincubator/create-react-app) and [netlify-lambda v1](https://github.com/netlify/netlify-lambda) together in a [Netlify Dev](https://www.netlify.com/docs/cli/?utm_source=github&utm_medium=swyx-CRAL&utm_campaign=devex#netlify-dev-beta) workflow. You can clone this and immediately be productive with a React app with serverless Netlify Functions in the same repo. Alternatively you can deploy straight to Netlify with this one-click Deploy:
  4 | 
  5 | 
  6 | [![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg?utm_source=github&utm_medium=swyx-CRAL&utm_campaign=devex)](https://app.netlify.com/start/deploy?repository=https://github.com/netlify/create-react-app-lambda&utm_source=github&utm_medium=swyx-CRAL&utm_campaign=devex)
  7 | 
  8 | > ⚠️NOTE: You may not need this project at all. [Netlify Dev](https://github.com/netlify/netlify-dev-plugin) works with `create-react-app` out of the box! Only use `netlify-lambda` if you need a build step for your functions, eg if you want to use Babel or TypeScript ([see its README for details](https://github.com/netlify/netlify-lambda/blob/master/README.md#netlify-lambda)).
  9 | 
 10 | ## Project Setup
 11 | 
 12 | **Source**: The main addition to base Create-React-App is a new folder: `src/lambda`. This folder is specified and can be changed in the `package.json` script: `"build:lambda": "netlify-lambda build src/lambda"`.
 13 | 
 14 | **Dist**: Each JavaScript file in there will be built for Netlify Function deployment in `/built-lambda`, specified in [`netlify.toml`](https://www.netlify.com/docs/netlify-toml-reference/?utm_source=github&utm_medium=swyx-CRAL&utm_campaign=devex).
 15 | 
 16 | As an example, we've included a small `src/lambda/hello.js` function, which will be deployed to `/.netlify/functions/hello`. We've also included an async lambda example using async/await syntax in `async-dadjoke.js`.
 17 | 
 18 | ## Video
 19 | 
 20 | Learn how to set this up yourself (and why everything is the way it is) from scratch in a video: https://www.youtube.com/watch?v=3ldSM98nCHI
 21 | 
 22 | ## Babel/webpack compilation
 23 | 
 24 | All functions (inside `src/lambda`) are compiled with webpack using Babel, so you can use modern JavaScript, import npm modules, etc., without any extra setup.
 25 | 
 26 | ## Local Development
 27 | 
 28 | ```bash
 29 | ## prep steps for first time users
 30 | npm i -g netlify-cli # Make sure you have the [Netlify CLI](https://github.com/netlify/cli) installed
 31 | git clone https://github.com/netlify/create-react-app-lambda ## clone this repo
 32 | cd create-react-app-lambda ## change into this repo
 33 | yarn # install all dependencies
 34 | 
 35 | ## done every time you start up this project
 36 | ntl dev ## nice shortcut for `netlify dev`, starts up create-react-app AND a local Node.js server for your Netlify functions
 37 | ```
 38 | 
 39 | This fires up [Netlify Dev](https://www.netlify.com/docs/cli/?utm_source=github&utm_medium=swyx-CRAL&utm_campaign=devex#netlify-dev-beta), which:
 40 | 
 41 | - Detects that you are running a `create-react-app` project and runs the npm script that contains `react-scripts start`, which in this project is the `start` script
 42 | - Detects that you use `netlify-lambda` as a [function builder](https://github.com/netlify/netlify-dev-plugin/#function-builders-function-builder-detection-and-relationship-with-netlify-lambda), and runs the npm script that contains `netlify-lambda build`, which in this project is the `build:lambda` script.
 43 | 
 44 | You can view the project locally via Netlify Dev, via `localhost:8888`.
 45 | 
 46 | Each function will be available at the same port as well:
 47 | 
 48 | - `http://localhost:8888/.netlify/functions/hello` and 
 49 | - `http://localhost:8888/.netlify/functions/async-dadjoke`
 50 | 
 51 | ## Deployment
 52 | 
 53 | During deployment, this project is configured, inside `netlify.toml` to run the build `command`: `yarn build`.
 54 | 
 55 | `yarn build` corresponds to the npm script `build`, which uses `npm-run-all` (aka `run-p`) to concurrently run `"build:app"` (aka `react-scripts build`) and `build:lambda` (aka `netlify-lambda build src/lambda`).
 56 | 
 57 | ## Typescript
 58 | 
 59 | <details>
 60 |   <summary>
 61 |     <b id="typescript">Click for instructions</b>
 62 |   </summary>
 63 | 
 64 | You can use Typescript in both your frontend React code (with `react-scripts` v2.1+) and your serverless functions (with `netlify-lambda` v1.1+). Follow these instructions:
 65 | 
 66 | 1. `yarn add -D typescript @types/node @types/react @types/react-dom @babel/preset-typescript @types/aws-lambda`
 67 | 2. convert `src/lambda/hello.js` to `src/lambda/hello.ts`
 68 | 3. use types in your event handler:
 69 | 
 70 | ```ts
 71 | import { Handler, Context, Callback, APIGatewayEvent } from 'aws-lambda'
 72 | 
 73 | interface HelloResponse {
 74 |   statusCode: number
 75 |   body: string
 76 | }
 77 | 
 78 | const handler: Handler = (event: APIGatewayEvent, context: Context, callback: Callback) => {
 79 |   const params = event.queryStringParameters
 80 |   const response: HelloResponse = {
 81 |     statusCode: 200,
 82 |     body: JSON.stringify({
 83 |       msg: `Hello world ${Math.floor(Math.random() * 10)}`,
 84 |       params,
 85 |     }),
 86 |   }
 87 | 
 88 |   callback(undefined, response)
 89 | }
 90 | 
 91 | export { handler }
 92 | ```
 93 | 
 94 | rerun and see it work!
 95 | 
 96 | You are free to set up your `tsconfig.json` and `tslint` as you see fit.
 97 | 
 98 | </details>
 99 | 
100 | **If you want to try working in Typescript on the client and lambda side**: There are a bunch of small setup details to get right. Check https://github.com/sw-yx/create-react-app-lambda-typescript for a working starter.
101 | 
102 | ## Routing and authentication with Netlify Identity
103 | 
104 | For a full demo of routing and authentication, check this branch: https://github.com/netlify/create-react-app-lambda/pull/18 This example will not be maintained but may be helpful.
105 | 
106 | ## Service Worker
107 | 
108 | `create-react-app`'s default service worker (in `src/index.js`) does not work with lambda functions out of the box. It prevents calling the function and returns the app itself instead ([Read more](https://github.com/facebook/create-react-app/issues/2237#issuecomment-302693219)). To solve this you have to eject and enhance the service worker configuration in the webpack config. Whitelist the path of your lambda function and you are good to go.
109 | 


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