final

src/App.jsx

@@ -1,33 +1,34 @@
-import { useMutation, QueryClientProvider, QueryClient } from '@tanstack/react-query'
-import PostAddForm from './components/PostAddForm'
+import React, { useMemo, useCallback, useState } from 'react'
 
-/*
-const mutation = useMutation({
-    mutationFn: newUser => {
-        fetch('https://jsonplaceholder.typicode.com/users', {
-            method: 'GET',
-            headers: {'Content-type':'application/json'},
-            body: JSON.stringify(newUser),
-        }).then(res => res.json())
-    }
+const TodoItem = React.memo(({ item, onToggle, onDelete }) => {
+    console.log(`rendred ${item.id}`);
+    return <li>
+            {item.name}
+            <button onClick={() => onToggle(item.id)}>Done</button>
+            <button onClick={() => onDelete(item.id)}>remove</button>
+        </li>
 })
-*/
 
-const createQueryClient = () => {
-    new QueryClient({
-        defaultOptions: {
-            queries: {
-                staleTime: 5 * 60*1000,
-                retry: 1,
-                gcTime: 10*60*1000,
-                refetchOnWindowFocus: false,
-            },
-            mutations: {
-                retry:0,
-                onError: error => {console.error('Mutation error:',error.message)}
-            }
-        }
-    })
+function ItemList({ items }) {
+
+    const handleToggle = useCallback(id => {
+        items.done = true;
+        console.log(`Item ${id} done`)
+        console.log(id)
+    },[]);
+    
+    const handleDelete = useCallback(id => {
+        items.pop(id);
+    },[]);
+    return (
+        <>
+            <h3>List items</h3>
+            {items.map(item => (
+             <TodoItem key={item.id} item={item}
+              onToggle={handleToggle} onDelete={handleDelete} />
+             ))}
+        </>
+    )
 }
 
 function App() {
@@ -35,10 +36,10 @@ function App() {
 		<>
 			{/* Добавьте тестовый контент для проверки */}
 			<h1>Hello, React!</h1>
-        <QueryClientProvider client={createQueryClient}>
-            <PostAddForm />
-        </QueryClientProvider>
-            
+            <ItemList items={[
+                {id:1,name:'Первый',done:false},
+                {id:2,name:'Второй',done:false}
+            ]} />
 		</>
 	)
 }

src/main.jsx

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