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‎.gitignore

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# See https://help.github.com/ignore-files/ for more about ignoring files.
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# dependencies
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/node_modules
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# testing
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/coverage
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# production
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/build
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/lambda
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# misc
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.DS_Store
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.env.local
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.env.development.local
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.env.test.local
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.env.production.local
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*

‎README.md

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This project is based on [Create React App v2](https://github.com/facebookincubator/create-react-app) and [netlify-lambda v1](https://github.com/netlify/netlify-lambda). (For more information about Create react App, check their full [documentation](https://github.com/facebookincubator/create-react-app#create-react-app).)
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The main addition is a new folder: `src/lambda`. Each JavaScript file in there will automatically be prepared for Lambda function deployment.
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As an example, we've included a small `src/lambda/hello.js` function, which will be deployed to `/.netlify/functions/hello`.
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[![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg)](https://app.netlify.com/start/deploy?repository=https://github.com/netlify/create-react-app-lambda)
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## Babel/webpack compilation
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All functions are compiled with webpack using the Babel Loader, so you can use modern JavaScript, import npm modules, etc., without any extra setup.
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## Local Development
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Before developing, clone the repository and run `yarn` from the root of the repo to install all dependencies.
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### Run the functions dev server
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From inside the project folder, run:
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```
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yarn start:lambda
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```
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This will open a local server running at `http://localhost:9000` serving your Lambda functions, updating as you make changes in the `src/lambda` folder.
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You can then access your functions directly at `http://localhost:9000/{function_name}`, but to access them with the app, you'll need to start the app dev server. Under the hood, this uses `react-scripts`' [advanced proxy feature](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#configuring-the-proxy-manually) with the `setupProxy.js` file.
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### Run the app dev server
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While the functions server is still running, open a new terminal tab and run:
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```
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yarn start
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```
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This will start the normal create-react-app dev server and open your app at `http://localhost:3000`.
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Local in-app requests to the relative path `/.netlify/functions/*` will automatically be proxied to the local functions dev server.

‎netlify.toml

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[build]
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Command = "yarn build && yarn build:lambda"
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Functions = "lambda"
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Publish = "build"

‎package.json

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{
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"name": "react-lambda",
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"version": "0.4.0",
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"private": true,
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"dependencies": {
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"react": "^16.5.2",
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"react-dom": "^16.5.2",
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"react-scripts": "2.0.4"
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},
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"scripts": {
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"start": "run-p start:**",
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"start:app": "react-scripts start",
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"start:lambda": "netlify-lambda serve src/lambda",
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"build": "run-p build:**",
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"build:app": "react-scripts build",
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"build:lambda": "netlify-lambda build src/lambda",
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"test": "react-scripts test",
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"eject": "react-scripts eject"
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},
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"eslintConfig": {
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"extends": "react-app"
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},
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"browserslist": [
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">0.2%",
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"not dead",
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"not ie <= 11",
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"not op_mini all"
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],
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"devDependencies": {
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"babel-loader": "^8.0.4",
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"http-proxy-middleware": "^0.19.0",
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"netlify-lambda": "^1.0.1",
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"npm-run-all": "^4.1.3"
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}
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}

‎public/favicon.ico

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‎public/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<meta name="theme-color" content="#000000">
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<!--
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manifest.json provides metadata used when your web app is added to the
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homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
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-->
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<link rel="manifest" href="%PUBLIC_URL%/manifest.json">
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<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
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<!--
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Notice the use of %PUBLIC_URL% in the tags above.
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It will be replaced with the URL of the `public` folder during the build.
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Only files inside the `public` folder can be referenced from the HTML.
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Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
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work correctly both with client-side routing and a non-root public URL.
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Learn how to configure a non-root public URL by running `npm run build`.
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-->
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<title>React App</title>
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</head>
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<body>
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<noscript>
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You need to enable JavaScript to run this app.
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</noscript>
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<div id="root"></div>
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<!--
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This HTML file is a template.
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If you open it directly in the browser, you will see an empty page.
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You can add webfonts, meta tags, or analytics to this file.
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The build step will place the bundled scripts into the <body> tag.
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To begin the development, run `npm start` or `yarn start`.
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To create a production bundle, use `npm run build` or `yarn build`.
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-->
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</body>
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</html>

‎public/manifest.json

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{
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"short_name": "React App",
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"name": "Create React App Sample",
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"icons": [
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{
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"src": "favicon.ico",
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"sizes": "64x64 32x32 24x24 16x16",
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"type": "image/x-icon"
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}
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],
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"start_url": "./index.html",
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"display": "standalone",
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"theme_color": "#000000",
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"background_color": "#ffffff"
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}

‎src/App.css

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.App {
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text-align: center;
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}
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.App-logo {
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animation: App-logo-spin infinite 20s linear;
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height: 40vmin;
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}
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.App-header {
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background-color: #282c34;
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min-height: 100vh;
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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font-size: calc(10px + 2vmin);
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color: white;
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}
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.App-link {
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color: #61dafb;
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}
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@keyframes App-logo-spin {
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from {
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transform: rotate(0deg);
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}
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to {
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transform: rotate(360deg);
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}
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}

‎src/App.js

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import React, { Component } from 'react';
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import logo from './logo.svg';
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import './App.css';
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class LambdaDemo extends Component {
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constructor(props) {
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super(props);
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this.state = { loading: false, msg: null };
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}
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handleClick = e => {
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e.preventDefault();
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this.setState({ loading: true });
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fetch('/.netlify/functions/hello')
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.then(response => response.json())
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.then(json => this.setState({ loading: false, msg: json.msg }));
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};
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render() {
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const { loading, msg } = this.state;
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return (
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<p>
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<button onClick={this.handleClick}>
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{loading ? 'Loading...' : 'Call Lambda'}
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</button>
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<br />
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<span>{msg}</span>
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</p>
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);
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}
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}
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class App extends Component {
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render() {
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return (
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<div className="App">
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<header className="App-header">
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<img src={logo} className="App-logo" alt="logo" />
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<p>
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Edit <code>src/App.js</code> and save to reload.
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</p>
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<LambdaDemo />
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</header>
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</div>
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);
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}
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}
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export default App;

‎src/App.test.js

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import React from 'react';
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import ReactDOM from 'react-dom';
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import App from './App';
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it('renders without crashing', () => {
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const div = document.createElement('div');
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ReactDOM.render(<App />, div);
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ReactDOM.unmountComponentAtNode(div);
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});

‎src/index.css

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body {
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margin: 0;
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padding: 0;
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font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
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'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
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sans-serif;
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-webkit-font-smoothing: antialiased;
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-moz-osx-font-smoothing: grayscale;
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}
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code {
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font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
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monospace;
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}

‎src/index.js

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import React from 'react';
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import ReactDOM from 'react-dom';
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import './index.css';
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import App from './App';
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import * as serviceWorker from './serviceWorker';
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ReactDOM.render(<App />, document.getElementById('root'));
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// If you want your app to work offline and load faster, you can change
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// unregister() to register() below. Note this comes with some pitfalls.
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// Learn more about service workers: http://bit.ly/CRA-PWA
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serviceWorker.unregister();

‎src/lambda/hello.js

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// show object spread works, i.e. babel works
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const obj = {
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foo: 'bar'
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};
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export function handler(event, context, callback) {
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console.log('qsp', event.queryStringParameters);
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console.log('**********');
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console.log('mvsp', event.multiValueQueryStringParameters);
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callback(null, {
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statusCode: 200,
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body: JSON.stringify({ msg: 'Hello, World!', ...obj })
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});
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}

‎src/logo.svg

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