Сделали практику с кнопками Увеличить Уменьшить счетчик

package.json

@@ -10,6 +10,7 @@
     "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

@@ -1,82 +1,29 @@
-import memo, { useMemo, useCallback, useState } from 'react'
+import styles from './styles/App.module.scss'
-
+import React, { useState, useCallback } from 'react'
-function MyComponent() {
-    const [count, setCount] = useState(0);
-    const [name, setName] = useState('John');
-    
-    const greeting = useMemo(() => `Hello, ${name}!`,[name]);
 
+function CounterButton({label, onClick}) {
     return (
-        <>
+        <button onClick={onClick} className={styles.counter_button}>{label}</button>
-        <h2>{greeting}</h2>
-        <button onClick={()=>setName('Alex')}>New name</button>
-        </>
     )
 }
-
+function CounterDisplay({value}) {
-function MyComponent2() {
+    return (<div className={styles.counter_display}>
-    const [data,setData] = useState([{theme:'light'}])
+            Значение счетчика: <b>{value}</b>
-    const userPreferences = useMemo(()=>({theme: 'dark', language: 'en'}),[]);
+    </div>)
-    
-    const processData = useMemo(()=>{
-        return data.map(item => ({ ...item,theme: userPreferences.theme }))
-    },[data, userPreferences]);
-    console.log(processData);
-    return (
-        <>
-            <h2 className={data.theme}>2</h2>
-            <button onClick={()=>setData(data)}>set new theme</button>
-        </>
-    )
-}
-
-function MyComponent3() {
-    const sum = useMemo(()=> a+b,[a,b]);//Бессмысленное применение и вредное
-
-    //Применение оправдано
-    const complexResult = useMemo(()=>{
-        return heavyMethOperations(largeDataSet);
-    },[largeDataSet])
-}
-
-function ParentComponent({ items }) {
-    const [filter, setFilter] = useState('');
-    
-    const listProps = useMemo(()=>({
-            items: items.filter(item => item.name.includes(filter)),
-            onItemClick: id => console.log('Clicked',id),
-            theme: 'dark'
-        }),[items,filter]);
-    
-    return (
-        <>
-        <Memoized {...listProps} />
-        <button onClick={()=>setFilter('Bob')}>Click</button>
-        </>
-    )
-}
-
-function Memoized(props) {
-    console.log(props);
-    return (
-        <>
-        <h3 className={props.theme}>Memoized</h3>
-        {props.items.map((item) => (
-         <>
-            <li>
-                {item.name}
-            </li>
-         </>))}
-        </>
-    )
 }
 
 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 */}
+            <h2>Практика по созданию счетчика с колбэками</h2>
-			<h1>Hello, React!</h1>
+            <CounterButton label="Увеличить" onClick={increment} />
-            <ParentComponent items={[{name:'Alex'},{name:'Bob'}]} />
+            <CounterButton label="уменьшить" onClick={decrement} />
+            <CounterDisplay value={counter} />
 		</>
 	)
 }

src/main.jsx

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