final

src/App.jsx

@@ -1,50 +1,45 @@
-import { useState, useReducer } from 'react'
+import React, { useMemo, useCallback, useState } from 'react'
 
-function counterReducer(state, action) {
+const TodoItem = React.memo(({ item, onToggle, onDelete }) => {
-    switch (action.type) {
+    console.log(`rendred ${item.id}`);
-        case 'increment':
+    return <li>
-            return state + 1
+            {item.name}
-        case 'decrement':
+            <button onClick={() => onToggle(item.id)}>Done</button>
-            return state - 1
+            <button onClick={() => onDelete(item.id)}>remove</button>
-        case 'reset':
+        </li>
-            return 0
+})
-        case 'set_value':
-            return action.value
-        default:
-            return state
-    }
-}
 
-function Counter() {
+function ItemList({ items }) {
-    const [count, dispatch] = useReducer(counterReducer,0);
+
+    const handleToggle = useCallback(id => {
+        items.done = true;
+        console.log(`Item ${id} done`)
+        console.log(id)
+    },[]);
     
+    const handleDelete = useCallback(id => {
+        items.pop(id);
+    },[]);
     return (
-        <div>
+        <>
-            <span>Счетчик: {count}</span>
+            <h3>List items</h3>
-            <button onClick={()=> dispatch({type: 'increment'})}>+</button>
+            {items.map(item => (
-            <button onClick={()=> dispatch({type: 'decrement'})}>-</button>
+             <TodoItem key={item.id} item={item}
-            <button onClick={()=> dispatch({type: 'reset'})}>reset</button>
+              onToggle={handleToggle} onDelete={handleDelete} />
-            <button onClick={()=> dispatch({type: 'set_value', value: 5})}>set 5</button>
+             ))}
-        </div>
+        </>
     )
 }
 
 function App() {
-    const [tasks, setTasks] = useState([])
-    const [filter, setFilter] = useState('all')
-    const [sortBy,setSortBy] = useState('date')
-    
-    const addTask = newTask => {
-        setTasks([...tasks,newTask])
-    }
-    
-    
-    
 	return (
 		<>
 			{/* Добавьте тестовый контент для проверки */}
 			<h1>Hello, React!</h1>
-            <Counter />
+            <ItemList items={[
+                {id:1,name:'Первый',done:false},
+                {id:2,name:'Второй',done:false}
+            ]} />
 		</>
 	)
 }

src/App.module.scss

@@ -1,15 +0,0 @@
-.container {
-/*    display: flex;
-    flex-direction: column;
-    flex-wrap: nowrap;*/
-    height: 500px;
-    overflow: auto;
-    border: 1px solid black;
-}
-.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>
 )