├── .gitignore
├── src
    ├── Header.css
    ├── Item.css
    ├── App.test.js
    ├── App.jsx
    ├── List.jsx
    ├── Header.jsx
    ├── index.css
    ├── index.js
    ├── useFetch.js
    ├── Item.jsx
    ├── App.css
    ├── reducers.js
    ├── Form.jsx
    ├── TodoStore.js
    ├── logo.svg
    └── serviceWorker.js
├── public
    ├── favicon.ico
    ├── manifest.json
    └── index.html
├── README.md
└── package.json


/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | .DS_Store
3 | 


--------------------------------------------------------------------------------
/src/Header.css:
--------------------------------------------------------------------------------
1 | .countInfo { 
2 |     margin-bottom: 1rem;
3 | }


--------------------------------------------------------------------------------
/src/Item.css:
--------------------------------------------------------------------------------
1 | .done {
2 |     text-decoration: line-through; 
3 |     font-style: italic;
4 | }


--------------------------------------------------------------------------------
/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/crongro/react-hooks-todos-app/HEAD/public/favicon.ico


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/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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/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": ".",
12 |   "display": "standalone",
13 |   "theme_color": "#000000",
14 |   "background_color": "#ffffff"
15 | }
16 | 


--------------------------------------------------------------------------------
/src/App.jsx:
--------------------------------------------------------------------------------
 1 | import React from 'react'
 2 | import TodoStore from './TodoStore.js';
 3 | import List from './List.jsx';
 4 | import Header from './Header.jsx';
 5 | import Form from './Form.jsx';
 6 | import './App.css';
 7 | 
 8 | const App = () => {
 9 |   return (
10 |     <TodoStore>
11 |       <Header />
12 |       <Form  />
13 |       <List />
14 |     </TodoStore>
15 |   )
16 | }
17 | 
18 | export default App
19 | 


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/README.md:
--------------------------------------------------------------------------------
 1 | Todo application using React Hooks API(16.8+)
 2 | 
 3 | -----
 4 | ## Usage
 5 | 
 6 | ```shell
 7 | npm install
 8 | npm start
 9 | ```
10 | Open [http://localhost:3000]
11 | 
12 | -----
13 | ## YouTube lecture
14 | [Youtube lecture](https://www.youtube.com/playlist?list=PLAHa1zfLtLiMukrBDWr-o0q-At7oARwXv)
15 | 
16 | ------
17 | \# This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).


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/src/List.jsx:
--------------------------------------------------------------------------------
 1 | import React, {useContext} from 'react'
 2 | import Item from './Item.jsx'
 3 | import { TodoContext } from './TodoStore.js';
 4 | 
 5 | const List = () => {
 6 | 
 7 |   const {todos, loading} = useContext(TodoContext);
 8 | 
 9 |   let todoList = <div>loading...</div>;
10 |   if(!loading) todoList = todos.map( (todo) => 
11 |     <Item key={todo.id} todo={todo} />
12 |   )
13 | 
14 |   return (
15 |     <ul>
16 |         {todoList}
17 |     </ul>
18 |   )
19 | }
20 | export default List


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/src/Header.jsx:
--------------------------------------------------------------------------------
 1 | import React, {useContext} from 'react'
 2 | import './Header.css';
 3 | import { TodoContext } from './TodoStore.js';
 4 | 
 5 | const Header = () => {
 6 |   const {todos} = useContext(TodoContext);
 7 |   return (
 8 |           <>
 9 |             <h1>HELLO TODO 애플리케이션</h1>
10 |             <div className="countInfo">
11 |               해야할일 ! {todos.filter(v => v.status === "todo").length}개가 있습니다
12 |             </div>
13 |           </>
14 |   )
15 | }
16 | 
17 | export default Header
18 | 


--------------------------------------------------------------------------------
/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 | 
16 | #root {
17 |   padding : 1.5rem;
18 | }
19 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import './index.css';
 4 | import App from './App.jsx';
 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/useFetch.js:
--------------------------------------------------------------------------------
 1 | import { useState, useEffect } from 'react';
 2 | 
 3 | const useFetch = (callback, url) => {
 4 | 
 5 |     const [loading, setLoading] = useState(false);
 6 |   
 7 |     const fetchInitialData = async () => {
 8 |       setLoading(true);
 9 |       const response = await fetch(url);
10 |       const initialData = await response.json();
11 |       callback(initialData);
12 |       setLoading(false);
13 |     }
14 |   
15 |     useEffect ( () => {
16 |       fetchInitialData();
17 |     }, [])
18 |   
19 |     return loading;
20 |   
21 |   }
22 | 
23 |   export default useFetch;


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "mytodo",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "react": "^16.8.3",
 7 |     "react-dom": "^16.8.3",
 8 |     "react-scripts": "2.1.5"
 9 |   },
10 |   "scripts": {
11 |     "start": "react-scripts start",
12 |     "build": "react-scripts build",
13 |     "test": "react-scripts test",
14 |     "eject": "react-scripts eject"
15 |   },
16 |   "eslintConfig": {
17 |     "extends": "react-app"
18 |   },
19 |   "browserslist": [
20 |     ">0.2%",
21 |     "not dead",
22 |     "not ie <= 11",
23 |     "not op_mini all"
24 |   ]
25 | }
26 | 


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/src/Item.jsx:
--------------------------------------------------------------------------------
 1 | import React, {useContext} from 'react'
 2 | import './Item.css'
 3 | import { TodoContext } from './TodoStore.js';
 4 | 
 5 | const Item = ({todo}) => {
 6 | 
 7 |   const {dispatch} = useContext(TodoContext);
 8 | 
 9 |   const toggleItem = (e) => {
10 |       const id = e.target.dataset.id;
11 |       dispatch({type:'CHANGE_TODO_STATUS', payload:id});
12 |   }
13 | 
14 |   const itemClassName = todo.status === 'done' ? 'done' : '';
15 | 
16 |   return (
17 |     <li data-id={todo.id} onClick={toggleItem} className={itemClassName} > {todo.title} </li>
18 |   )
19 | }
20 | 
21 | export default Item
22 | 


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/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 | 


--------------------------------------------------------------------------------
/src/reducers.js:
--------------------------------------------------------------------------------
 1 | export const todoReducer = (todos, {type, payload}) => {
 2 |     switch (type) {
 3 |       case "ADD_TODO":
 4 |         return [...todos, {'title': payload, 'id' : todos.length, 'status' : 'todo'}]
 5 |     
 6 |       case "SET_INIT_DATA":
 7 |         return payload;
 8 |   
 9 |       case "CHANGE_TODO_STATUS":
10 |         return todos.map(todo => {
11 |           if(todo.id === +payload) {
12 |             if(todo.status === "done") todo.status = "todo";
13 |             else todo.status = "done";
14 |           }
15 |           return todo;
16 |         });
17 |   
18 |       default:
19 |         break;
20 |     }
21 |     
22 |   }
23 |   


--------------------------------------------------------------------------------
/src/Form.jsx:
--------------------------------------------------------------------------------
 1 | import React, {useContext, useRef} from 'react'
 2 | import { TodoContext } from './TodoStore.js';
 3 | 
 4 | const Form = () => {
 5 |     const inputRef = useRef(false);
 6 |     const {dispatch} = useContext(TodoContext);
 7 | 
 8 |     const addTodoData = (e) => {
 9 |         e.preventDefault();
10 |         dispatch({type:'ADD_TODO', payload :inputRef.current.value})
11 |     }
12 | 
13 |     return (
14 |         <>
15 |             <form action="">
16 |                 <input type="text" ref={inputRef} />
17 |                 <button onClick={addTodoData}>할일추가</button>
18 |             </form>
19 |         </>
20 |     )
21 | }
22 | 
23 | export default Form
24 | 


--------------------------------------------------------------------------------
/src/TodoStore.js:
--------------------------------------------------------------------------------
 1 | import React, { useEffect, useReducer } from 'react';
 2 | import useFetch from './useFetch.js';
 3 | import {todoReducer}  from './reducers.js';
 4 | 
 5 | export const TodoContext = React.createContext();
 6 | 
 7 | const TodoStore = (props) => {
 8 |   const [todos, dispatch] = useReducer(todoReducer, []);
 9 | 
10 |   const setInitData = (initData) => {
11 |     dispatch({type:'SET_INIT_DATA', payload:initData})
12 |   }
13 | 
14 |   const loading = useFetch(setInitData, 'http://localhost:8080/todo');
15 | 
16 |   useEffect( ()=> {
17 |     console.log("새로운 내용이 렌더링됐네요", todos);
18 |   }, [todos])
19 | 
20 |   return (
21 |     <TodoContext.Provider value={ {todos, loading, dispatch} }>
22 |       {props.children}
23 |     </TodoContext.Provider>
24 |   )
25 | }
26 | 
27 | export default TodoStore;
28 | 


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/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
 7 |       name="viewport"
 8 |       content="width=device-width, initial-scale=1, shrink-to-fit=no"
 9 |     />
10 |     <meta name="theme-color" content="#000000" />
11 |     <!--
12 |       manifest.json provides metadata used when your web app is installed on a
13 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
14 |     -->
15 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
16 |     <!--
17 |       Notice the use of %PUBLIC_URL% in the tags above.
18 |       It will be replaced with the URL of the `public` folder during the build.
19 |       Only files inside the `public` folder can be referenced from the HTML.
20 | 
21 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
22 |       work correctly both with client-side routing and a non-root public URL.
23 |       Learn how to configure a non-root public URL by running `npm run build`.
24 |     -->
25 |     <title>React App</title>
26 |   </head>
27 |   <body>
28 |     <noscript>You need to enable JavaScript to run this app.</noscript>
29 |     <div id="root"></div>
30 |     <!--
31 |       This HTML file is a template.
32 |       If you open it directly in the browser, you will see an empty page.
33 | 
34 |       You can add webfonts, meta tags, or analytics to this file.
35 |       The build step will place the bundled scripts into the <body> tag.
36 | 
37 |       To begin the development, run `npm start` or `yarn start`.
38 |       To create a production bundle, use `npm run build` or `yarn build`.
39 |     -->
40 |   </body>
41 | </html>
42 | 


--------------------------------------------------------------------------------
/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 | // 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 http://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 http://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 http://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 | 


--------------------------------------------------------------------------------