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

@@ -1,60 +1,30 @@
-import { memo, useState, useMemo } from 'react'
-
-function memoize(fn) {
-    const cache = new Map();
-    return function(...args) {
-        const key = JSON.stringify(args);
-        if (cache.has(key)) {
-            return cache.get(key);
-        }
-        const result = fn.apply(this, args);
-        cache.set(key,result);
-        return result;
-    }
-}
-
-function fibonachi(n, memo={}) {
-    if (n in memo) {console.log(n);return memo[n];}
-    if (n <= 1) return 1;
-    memo[n] = fibonachi(n-1, memo) + fibonachi(n - 2, memo);
-    return memo[n];
-}
-
-const MyComponent = ({ value }) => {
-    console.log('Rendring');
-    return <div>{value}</div>
-}
-
-const MemoizedComponent = memo(MyComponent);
-
-const Child = memo(({ children }) => {
-    console.log('Child component rendred');
-    return <div>{children}</div>;
-});
-
-const Parent = () => {
-    const [count,setCount] = useState(0);
-    const [text, setText] = useState('');
-    
-    const stableChild = useMemo(() => <span>Memo text</span>,[]);
+import styles from './styles/App.module.scss'
+import React, { useState, useCallback } from 'react'
 
+function CounterButton({label, onClick}) {
     return (
-        <>
-            <Child>
-                {stableChild}
-            </Child>
-            <input type="text" onChange={(e) => setText(e.target.value)} value={text} />
-            <button onClick={() => setCount(count + 1)}>Increment {count}</button>
-        </>
+        <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 (
 		<>
-			<h1>Hello, React!</h1>
-            <Parent />
-        </>
+            <h2>Практика по созданию счетчика с колбэками</h2>
+            <CounterButton label="Увеличить" onClick={increment} />
+            <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>
 )