Сделали отложеную загрузку и перехват исключений

package.json

@@ -10,9 +10,10 @@
     "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",
@@ -23,8 +24,6 @@
     "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

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

@@ -1,22 +0,0 @@
-.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;
-    }
-}