mission: mission 1 완료

keyword/chapter02/hello-react/react_basic.md

@@ -0,0 +1,86 @@
+ import './App.css'
+// import List from './components/List';
+import {useState} from 'react';
+
+function App() {
+  // jsx 실습
+  /*
+  const nickname = '매튜'
+  const sweetPotato = '고구마'
+  const array = ['REACT', 'NEXT', 'VUE', 'SVELTE', 'ANGULAR', 'REACT-NATIVE']
+  return (
+     <>
+      <strong className='school'>상명대학교</strong>
+      <p style={{color: 'purple', fontWeight:'bold', fontSize:'3rem'}}>{nickname}/김용민</p>
+      <h1>{`${nickname}는 ${sweetPotato} 아이스크림을 좋아합니다.`}</h1>
+      <ul>
+        {array.map((yaho, idx) => (
+          <List key = {idx} tech = {yaho} />
+        ))}
+      </ul>
+     </>
+  )
+  */
+
+  //useState 실습
+  /*
+  const [count, setCount] = useState(0)
+  const handleIncreaseNumber = () => {
+    setCount(count + 1);
+
+    // setCount를 여러번 호출해도 한 번 호출한 것과 같은 결과
+    // setCount(prev => prev + 1); 로 해결 가능!
+    setCount(prev => prev + 1);
+    setCount(prev => prev + 1);
+    setCount(prev => prev + 1);
+    setCount(prev => prev + 1);
+    setCount(prev => prev + 1);
+    setCount(prev => prev + 1);
+  }
+  return (
+     <>
+      <h1>{count}</h1>
+      <button onClick={handleIncreaseNumber}>숫자 증가</button>
+     </>
+  )
+  */
+
+  // useState를 활용하여 객체를 업데이트 하기
+  /*
+  const [person, setPerson] = useState({
+    // useState를 이용하여 person 객체를 초기화
+    name: "임가희",
+    age: 10,
+    nickname: "제리"
+  });
+
+  // city 값 새로 추가하여 업데이트 하는 함수
+  const updateCity = () => {
+    setPerson(prevPerson => ({
+      ...prevPerson,  // 얕은 복사
+      city: "서울"
+    }));
+  };
+
+  // age 값을 1씩 증가시키는 함수
+  const increaseAge = () => {
+    setPerson(prevPerson => ({
+      ...prevPerson, // 이전 person 객체의 복사본 생성
+      age: prevPerson.age + 1 // 다른 key value는 유지하고 age 값만 1 증가
+    }))
+  }
+
+  return(
+    <>
+      <h1>이름: {person.name}</h1>
+      <h2>나이: {person.age}</h2>
+      <h3>닉네임: {person.nickname}</h3>
+      {person.city && <h4>도시: {person.city}</h4>}
+      <button onClick={updateCity}>도시 추가</button>
+      <button onClick={increaseAge}>나이 증가</button>
+    </>
+  );
+  */
+}
+
+export default App

keyword/chapter02/hello-react/src/App.jsx

@@ -1,87 +1,7 @@
 import './App.css'
-// import List from './components/List';
 import {useState} from 'react';
 
 function App() {
-  // jsx 실습
-  /*
-  const nickname = '매튜'
-  const sweetPotato = '고구마'
-  const array = ['REACT', 'NEXT', 'VUE', 'SVELTE', 'ANGULAR', 'REACT-NATIVE']
-  return (
-     <>
-      <strong className='school'>상명대학교</strong>
-      <p style={{color: 'purple', fontWeight:'bold', fontSize:'3rem'}}>{nickname}/김용민</p>
-      <h1>{`${nickname}는 ${sweetPotato} 아이스크림을 좋아합니다.`}</h1>
-      <ul>
-        {array.map((yaho, idx) => (
-          <List key = {idx} tech = {yaho} />
-        ))}
-      </ul>
-     </>
-  )
-  */
-
-  //useState 실습
-  /*
-  const [count, setCount] = useState(0)
-  const handleIncreaseNumber = () => {
-    setCount(count + 1);
-
-    // setCount를 여러번 호출해도 한 번 호출한 것과 같은 결과
-    // setCount(prev => prev + 1); 로 해결 가능!
-    setCount(prev => prev + 1);
-    setCount(prev => prev + 1);
-    setCount(prev => prev + 1);
-    setCount(prev => prev + 1);
-    setCount(prev => prev + 1);
-    setCount(prev => prev + 1);
-  }
-  return (
-     <>
-      <h1>{count}</h1>
-      <button onClick={handleIncreaseNumber}>숫자 증가</button>
-     </>
-  )
-  */
-
-  // useState를 활용하여 객체를 업데이트 하기
-  /*
-  const [person, setPerson] = useState({
-    // useState를 이용하여 person 객체를 초기화
-    name: "임가희",
-    age: 10,
-    nickname: "제리"
-  });
-
-  // city 값 새로 추가하여 업데이트 하는 함수
-  const updateCity = () => {
-    setPerson(prevPerson => ({
-      ...prevPerson,  // 얕은 복사
-      city: "서울"
-    }));
-  };
-
-  // age 값을 1씩 증가시키는 함수
-  const increaseAge = () => {
-    setPerson(prevPerson => ({
-      ...prevPerson, // 이전 person 객체의 복사본 생성
-      age: prevPerson.age + 1 // 다른 key value는 유지하고 age 값만 1 증가
-    }))
-  }
-
-  return(
-    <>
-      <h1>이름: {person.name}</h1>
-      <h2>나이: {person.age}</h2>
-      <h3>닉네임: {person.nickname}</h3>
-      {person.city && <h4>도시: {person.city}</h4>}
-      <button onClick={updateCity}>도시 추가</button>
-      <button onClick={increaseAge}>나이 증가</button>
-    </>
-  );
-  */
-
   // 실습 - ToDoList 만들며 useState 익히기
 
   const [todos, setTodos] = useState([
@@ -93,13 +13,17 @@ function App() {
 
   const [text, setText] = useState('');
 
+  const [editingId, setEditingId] = useState(false);
+  const [editText, setEditText] = useState('');
+
   // 렌더링 방지 함수
   const handleSubmit = (e) => {
     e.preventDefault();
   };
 
   // 1. 추가하기
   const addTodo = () => {
+    if(text.trim().length === 0) return; // 입력창이 빈칸일 때는 todo 추가 안 됨
     setTodos((prev) => [
       ...prev,
       { id: Math.floor(Math.random() * 100) + 2, task: text },
@@ -110,9 +34,16 @@ function App() {
   // 2. 삭제하기
   const deleteTodo = (id) => {
     setTodos((prev) => prev.filter((item) => item.id !== id));
-  };
+  }; // 삭제하기 버튼을 누른 todo만 제외한 나머지를 보여주기
+  // id: 삭제하기 버튼을 누른 todo의 id, item: todos 배열의 요소, filter: todos 배열을 순회
 
   // 3. **수정하기**
+  const updateTodo = (id, text) => {
+    setTodos((prev) =>
+      prev.map((item) => (item.id === id ? { ...item, task: text } : item))
+    );
+    setEditingId('');
+  };
 
   return(
     <>
@@ -126,8 +57,30 @@ function App() {
       <div>
         {todos.map((todo, _) => (
           <div key={todo.id} style={{display: 'flex', gap: '20px'}}>
-            <h4>{todo.id}. {todo.task}</h4>
-            <button onClick={() => deleteTodo()}>삭제하기</button>
+            {/* 수정이 아닐 때 */}
+            {editingId !== todo.id && (
+              <div key ={todo.id} style = {{display: 'flex', gap: '5px'}}>
+              <p>{todo.id}.</p>
+              <p>{todo.task}</p>
+            </div>
+            )}
+            {/* 수정중 상태일 때 */}
+            {editingId === todo.id && (
+              <div key ={todo.id} style = {{display: 'flex', gap: '5px'}}>
+              <p>{todo.id}.</p>
+              <input 
+                defaultValue={todo.task} 
+                onChange={(e) => setEditText(e.target.value)}
+              />
+            </div>
+            )}
+            <button onClick={() => deleteTodo(todo.id)}>삭제하기</button>
+
+            {editingId === todo.id ?(
+              <button onClick={() => updateTodo(editingId, editText)}>수정 완료</button>
+            ) : (
+              <button onClick={() => setEditingId(todo.id)}>수정 진행</button>
+            )}
           </div>
         ))}
       </div>

mission/chapter02/mission1/.gitignore

@@ -0,0 +1,23 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

mission/chapter02/mission1/README.md

@@ -0,0 +1,70 @@
+# Getting Started with Create React App
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm start`
+
+Runs the app in the development mode.\
+Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
+
+The page will reload when you make changes.\
+You may also see any lint errors in the console.
+
+### `npm test`
+
+Launches the test runner in the interactive watch mode.\
+See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
+
+### `npm run build`
+
+Builds the app for production to the `build` folder.\
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.\
+Your app is ready to be deployed!
+
+See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
+
+### `npm run eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can't go back!**
+
+If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
+
+You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
+
+## Learn More
+
+You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
+
+To learn React, check out the [React documentation](https://reactjs.org/).
+
+### Code Splitting
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
+
+### Analyzing the Bundle Size
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
+
+### Making a Progressive Web App
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
+
+### Advanced Configuration
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
+
+### Deployment
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
+
+### `npm run build` fails to minify
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)