Конец урока

package.json

@@ -10,7 +10,6 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "info": "^1.0.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },
@@ -23,8 +22,6 @@
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.19",
     "globals": "^16.0.0",
-    "sass": "^1.99.0",
-    "sass-embedded": "^1.99.0",
     "vite": "^6.3.5"
   }
 }

src/App.jsx

@@ -1,30 +1,67 @@
-import styles from './styles/App.module.scss'
-import React, { useState, useCallback } from 'react'
+import React, { useState, useReducer, useRef, memo } from 'react'
 
-function CounterButton({label, onClick}) {
+function tasksReducer(state, action) {
+    switch(action.type) {
+        case 'ADD_TASK':
+            return [...state, action.payload]
+        case 'TOGGLE_TASK':
+            return state.map(task => task.id === action.payload ? {...task, complite: !task.complite} : task)
+        case 'REMOVE_TASK':
+            return state.filter(task => task.id !== action.payload)
+        default:
+            return state
+    }
+}
+
+const TaskList = memo(function TaskList({tasks, onToggle, onRemove}) {
+    console.log("Rendred")
     return (
-        <button onClick={onClick} className={styles.counter_button}>{label}</button>
+        <ul>
+        {tasks.map(({id, text, complite}) => (
+                <li key={id}
+                    style={{textDecoration: complite ? 'line-through' : 'none' }}>
+                    <input type="checkbox" checked={complite} onChange={()=>onToggle(id)} />
+                    {text}
+                    <button onClick={()=> onRemove(id)} style={{marginLeft: 10}}>
+                        Удалить
+                    </button>
+                </li>
+            ))}
+        </ul>
     )
-}
-function CounterDisplay({value}) {
-    return (<div className={styles.counter_display}>
-            Значение счетчика: <b>{value}</b>
-    </div>)
-}
+})
 
 function App() {
-    const [counter,setCounter] = useState(0);
+    const [tasks, dispatch] = useReducer(tasksReducer,[])
+    const [input,setInput] = useState('')
+    const [error,setError] = useState('')
+    const inputRef = useRef(null)
     
-    const increment = () => setCounter(prev => prev + 1);
-    const decrement = () => setCounter(prev => prev - 1);
+    const addTask = () => {
+        if (input.trim() === '') {
+            setError('Пустой текст задачи')
+            return
+        }
+        setError('')
+        dispatch({
+            type: 'ADD_TASK',
+            payload: {id: Date.now(), text: input.trim(), complite: false }
+        })
+        setInput('')
+        inputRef.current.focus()
+    }
     
 	return (
-		<>
-            <h2>Практика по созданию счетчика с колбэками</h2>
-            <CounterButton label="Увеличить" onClick={increment} />
-            <CounterButton label="уменьшить" onClick={decrement} />
-            <CounterDisplay value={counter} />
-		</>
+		<div style={{padding: 20}}>
+			<h1>Список дел</h1>
+			<input ref={inputRef} value={input} onChange={e => setInput(e.target.value)} />
+			<button onClick={addTask}>Добавить</button>
+            {error && <p style={{color: 'red'}}>{error}</p>}
+            
+            <TaskList tasks={tasks} 
+                onToggle={id => dispatch({type: 'TOGGLE_TASK', payload: id})}
+                onRemove={id => dispatch({type: 'REMOVE_TASK', payload: id})} />
+		</div>
 	)
 }