Сделали несколько страниц с отложенной загрузкой

package-lock.json

@@ -8,9 +8,9 @@
       "name": "store-client",
       "version": "0.0.0",
       "dependencies": {
-        "immer": "^11.1.8",
         "react": "^19.1.0",
-        "react-dom": "^19.1.0"
+        "react-dom": "^19.1.0",
+        "react-router-dom": "^7.17.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.25.0",
@@ -1601,6 +1601,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.1.1.tgz",
+      "integrity": "sha512-ei8Aos7ja0weRpFzJnEA9UHJ/7XQmqglbRwnf2ATjcB9Wq874VKH9kfjjirM6UhU2/E5fFYadylyhFldcqSidQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -2055,16 +2068,6 @@
         "node": ">= 4"
       }
     },
-    "node_modules/immer": {
-      "version": "11.1.8",
-      "resolved": "https://registry.npmjs.org/immer/-/immer-11.1.8.tgz",
-      "integrity": "sha512-/tbkHMW7y10Lx6i1crLjD4/OhNkRG+Fo7byZHtah0547nIeXYcpIXaUh0IAQY6gO5459qpGGYapcEOHtFXkIuA==",
-      "license": "MIT",
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/immer"
-      }
-    },
     "node_modules/import-fresh": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.3.1.tgz",
@@ -2482,6 +2485,44 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-router": {
+      "version": "7.17.0",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-7.17.0.tgz",
+      "integrity": "sha512-FDELK7rTMlCHO5+reyXsPlmfr7N1F91lPHsWYfMEGQm/KQ+F4JFM8jGoeQDmDvdTs93Fw9aSilH+uKRb4/jXvQ==",
+      "license": "MIT",
+      "dependencies": {
+        "cookie": "^1.0.1",
+        "set-cookie-parser": "^2.6.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/react-router-dom": {
+      "version": "7.17.0",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.17.0.tgz",
+      "integrity": "sha512-fyU2yjGups/hE6Xz0I5ZYbVL8Gx29eCjgpHaRaTaVU+OOAdfRX05KsvyRm0GO8YQwOkhpU3MurW1jyMUJn+zSw==",
+      "license": "MIT",
+      "dependencies": {
+        "react-router": "7.17.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
+      }
+    },
     "node_modules/resolve-from": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
@@ -2555,6 +2596,12 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
+      "integrity": "sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==",
+      "license": "MIT"
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",

package.json

@@ -10,9 +10,9 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "immer": "^11.1.8",
     "react": "^19.1.0",
-    "react-dom": "^19.1.0"
+    "react-dom": "^19.1.0",
+    "react-router-dom": "^7.17.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.25.0",

src/App.jsx

@@ -1,50 +1,28 @@
-import React, { useState, useEffect } from 'react'
-import { produce } from 'immer'
+import { Suspense, lazy } from 'react'
+import { BrowserRouter, Routes, Route } from 'react-router-dom'
+
+const HomePage = lazy(() => import('./pages/HomePage'))
+const AboutPage = lazy(() => import('./pages/AboutPage'))
+const ContactPage = lazy(() => import('./pages/ContactPage'))
+const AdminPanel = lazy(() => import('./pages/AdminPanel'))
 
 function App() {
-    const [tasks,setTasks] = useState([])
-    const [input,setInput] = useState('')
-    
-    const addTask = () => {
-        if(!input.trim()) return
-        
-        setTasks(currentTasks => produce(currentTasks, draft => {
-            draft.push({
-                id: Date.now(),
-                text: input.trim(),
-                done: false
-            })
-        }))
-        setInput('')
-    }
-    const toggleTask = id => {
-        setTasks(currentTask => produce(currentTask, draft => {
-            const task = draft.find(t => t.id === id)
-            if(task) {
-                task.done = !task.done
-            }
-        }))
-    }
-    const removeTask = id => {
-        setTasks(currentTask => produce(currentTask, draft => {
-            const index = draft.findIndex(t => t.id === id)
-            if (index !== -1)
-                draft.splice(index,1)
-        }))
-    }
 	return (
-		<>
-			<h1>Практика по созданию списка задач</h1>
-            <input value={input} onChange={e=>setInput(e.target.value)} />
-            <button onClick={addTask}>Добавить</button>
-        <ul>{tasks.map(({id,text,done}) => (
-                <li key={id} style={{ textDecoration: done ? 'line-through' : 'none'}}>
-                <input type="checkbox" checked={done} onChange={()=> toggleTask(id)} />
-                {text}
-                <button onClick={() => removeTask(id)}>Удалить</button>
-                </li>
-            ))}</ul>
-		</>
+		<BrowserRouter>
+		    <div>
+                <nav><a href='/'>Главная</a> <a href='/about'>О нас</a> <a href='/contact'>Контакты</a></nav>
+                <main>
+                    <Suspense fallback={<div>Загрузка ...</div>}>
+                        <Routes>
+                            <Route path='/' element={<HomePage />} />
+                            <Route path='/about' element={<AboutPage />} />
+                            <Route path='/contact' element={<ContactPage />} />
+                            <Route path='/admin' element={<AdminPanel />} />
+                        </Routes>
+                    </Suspense>
+                </main>
+		    </div>
+		</BrowserRouter>
 	)
 }
 

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>
 )

src/pages/AboutPage.jsx

@@ -0,0 +1,9 @@
+export function MyComponent() {
+    return (
+        <>
+        <h1>About Page</h1>
+        </>
+        )
+}
+
+export default MyComponent

src/pages/AdminPanel.jsx

@@ -0,0 +1,9 @@
+export function MyComponent() {
+    return (
+        <>
+        <h1>Admin Page</h1>
+        </>
+        )
+}
+
+export default MyComponent

src/pages/ContactPage.jsx

@@ -0,0 +1,9 @@
+export function MyComponent() {
+    return (
+        <>
+        <h1>Contact Page</h1>
+        </>
+        )
+}
+
+export default MyComponent

src/pages/HomePage.jsx

@@ -1,8 +1,9 @@
 export function MyComponent() {
     return (
         <>
-        <h1>Hello</h1>
+        <h1>Home Page</h1>
         </>
-    )
+        )
 }
+
 export default MyComponent