Ничего не сделали

package.json

@@ -10,10 +10,9 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "info": "^1.0.0",
     "react": "^19.1.0",
-    "react-dom": "^19.1.0",
+    "react-dom": "^19.1.0"
-    "react-error-boundary": "^6.1.2",
-    "react-router-dom": "^7.17.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.25.0",
@@ -24,6 +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

@@ -1,25 +1,29 @@
-import { Suspense, lazy } from 'react'
+import styles from './styles/App.module.scss'
-import { ErrorBoundary } from 'react-error-boundary'
+import React, { useState, useCallback } from 'react'
 
-const LazyComponent = lazy(() => import('./MyComponent'))
+function CounterButton({label, onClick}) {
-
-function ErrorFallBack({error, resetErrorBoundary }) {
     return (
-        <div>
+        <button onClick={onClick} className={styles.counter_button}>{label}</button>
-            <h2>Что то сломалось</h2>
-            <button onClick={resetErrorBoundary}></button>
-        </div>
     )
 }
+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 (
 		<>
-			<ErrorBoundary FallBackComponent={ErrorFallBack}>
+            <h2>Практика по созданию счетчика с колбэками</h2>
-                <Suspense fallback={<div>Загрузка ...</div>}>
+            <CounterButton label="Увеличить" onClick={increment} />
-			        <LazyComponent />
+            <CounterButton label="уменьшить" onClick={decrement} />
-                </Suspense>
+            <CounterDisplay value={counter} />
-            </ErrorBoundary>
 		</>
 	)
 }

src/main.jsx

@@ -1,6 +1,6 @@
 import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
-// удаляем import './index.css'
+
 import App from './App.jsx'
 
 createRoot(document.getElementById('root')).render(

src/styles/App.module.scss

@@ -0,0 +1,22 @@
+.container {
+    display:flex;
+    flex-direction: row;
+    border: 1px solid black;
+    border-radius: 5px;
+    margin-bottom: 10px;
+    p {
+        padding: 5px 10px;
+    }
+}
+.counter {
+    &_display{
+        border: 1px solid black;
+        border-width: 3px;
+        border-radius: 10px;
+        padding: 10px;
+        width: 300px;
+    }
+    &_button{
+        padding: 10px;
+    }
+}