final

src/App.jsx

@@ -1,78 +1,45 @@
-import { useState, createContext, useContext } from 'react'
-import styles from './App.module.scss'
+import React, { useMemo, useCallback, useState } from 'react'
 
-const UserContext = createContext('')
+const TodoItem = React.memo(({ item, onToggle, onDelete }) => {
+    console.log(`rendred ${item.id}`);
+    return <li>
+            {item.name}
+            <button onClick={() => onToggle(item.id)}>Done</button>
+            <button onClick={() => onDelete(item.id)}>remove</button>
+        </li>
+})
 
-function UserProvider({ children }) {
-    const [name,setName] = useState('');
+function ItemList({ items }) {
 
-    const toggleName = (newName) => {
-        setName(newName);
-    }
+    const handleToggle = useCallback(id => {
+        items.done = true;
+        console.log(`Item ${id} done`)
+        console.log(id)
+    },[]);
     
+    const handleDelete = useCallback(id => {
+        items.pop(id);
+    },[]);
     return (
-        <UserContext.Provider value={{name, toggleName}}>
-            {children}
-        </UserContext.Provider>
-    )
-}
-
-function Form() {
-    const {name, toggleName} = useContext(UserContext)
-    const [newName,setNewName] = useState('');
-    const handleSubmit = (event) => {
-        event.preventDefault();
-        toggleName(event.target[0].value)
-    }
-    const handlerChange = (event) => {
-        setNewName(event.target.value);
-    }
-    return (
-        <form onSubmit={handleSubmit}>
-        <input type='text' value={newName} onChange={handlerChange} />
-        <button type='submit'>Войти</button>
-        </form>
-    )
-}
-
-function ExitButton() {
-    const {name, toggleName} = useContext(UserContext)
-    
-    return (
-        <button onClick={() => toggleName('')}>Выход</button>
-    )
-}
-
-function Toolbar() {
-    const {name, toggleName} = useContext(UserContext)
-    return(
-        <div className={styles.container}>
-            <h3>Панель пользователя</h3>
-            {name && `Привет ${name}`}
-            {name ? <ExitButton /> : <Form /> }
-            
-        </div>
-    )
-}
-
-function Page() {
-    return (
-        <div>
-            <h1 style={{textAlign: 'center'}}>Главная страница</h1>
-            <Toolbar />
-        </div>
+        <>
+            <h3>List items</h3>
+            {items.map(item => (
+             <TodoItem key={item.id} item={item}
+              onToggle={handleToggle} onDelete={handleDelete} />
+             ))}
+        </>
     )
 }
 
 function App() {
-    
 	return (
 		<>
 			{/* Добавьте тестовый контент для проверки */}
 			<h1>Hello, React!</h1>
-        <UserProvider>
-            <Page />
-        </UserProvider>
+            <ItemList items={[
+                {id:1,name:'Первый',done:false},
+                {id:2,name:'Второй',done:false}
+            ]} />
 		</>
 	)
 }

src/App.module.scss

@@ -1,13 +0,0 @@
-.container {
-    height: 500px;
-    border: 1px solid black;
-    border-radius: 10px;
-    background-color: lightblue;
-}
-.item {
-    font-size: 16pt;
-    border: 1px dotted gray;
-    /*margin: 5px 10px;
-    padding: 10px;*/
-    border-radius: 5px;
-}

src/main.jsx

@@ -4,7 +4,5 @@ import { createRoot } from 'react-dom/client'
 import App from './App.jsx'
 
 createRoot(document.getElementById('root')).render(
-	<StrictMode>
 		<App />
-	</StrictMode>
 )