Сделали практику с кнопками Увеличить Уменьшить счетчик

package.json

@@ -4,12 +4,13 @@
   "version": "0.0.0",
   "type": "module",
   "scripts": {
-    "dev": "vite", 
+    "dev": "vite",
     "build": "vite build",
     "lint": "eslint .",
     "preview": "vite preview"
   },
   "dependencies": {
+    "info": "^1.0.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },
@@ -22,6 +23,8 @@
     "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

@@ -1,44 +1,29 @@
-import { useMutation, QueryClientProvider, QueryClient } from '@tanstack/react-query'
-import PostAddForm from './components/PostAddForm'
+import styles from './styles/App.module.scss'
+import React, { useState, useCallback } from 'react'
 
-/*
-const mutation = useMutation({
-    mutationFn: newUser => {
-        fetch('https://jsonplaceholder.typicode.com/users', {
-            method: 'GET',
-            headers: {'Content-type':'application/json'},
-            body: JSON.stringify(newUser),
-        }).then(res => res.json())
-    }
-})
-*/
-
-const createQueryClient = () => {
-    new QueryClient({
-        defaultOptions: {
-            queries: {
-                staleTime: 5 * 60*1000,
-                retry: 1,
-                gcTime: 10*60*1000,
-                refetchOnWindowFocus: false,
-            },
-            mutations: {
-                retry:0,
-                onError: error => {console.error('Mutation error:',error.message)}
-            }
-        }
-    })
+function CounterButton({label, onClick}) {
+    return (
+        <button onClick={onClick} className={styles.counter_button}>{label}</button>
+    )
+}
+function CounterDisplay({value}) {
+    return (<div className={styles.counter_display}>
+            Значение счетчика: <b>{value}</b>
+    </div>)
 }
 
 function App() {
+    const [counter,setCounter] = useState(0);
+    
+    const increment = () => setCounter(prev => prev + 1);
+    const decrement = () => setCounter(prev => prev - 1);
+    
 	return (
 		<>
-			{/* Добавьте тестовый контент для проверки */}
-			<h1>Hello, React!</h1>
-        <QueryClientProvider client={createQueryClient}>
-            <PostAddForm />
-        </QueryClientProvider>
-            
+            <h2>Практика по созданию счетчика с колбэками</h2>
+            <CounterButton label="Увеличить" onClick={increment} />
+            <CounterButton label="уменьшить" onClick={decrement} />
+            <CounterDisplay value={counter} />
 		</>
 	)
 }