i dont know

src/App.jsx

@@ -1,98 +1,44 @@
-import { useState, useRef, useEffect } from 'react'
+import { useMutation, QueryClientProvider, QueryClient } from '@tanstack/react-query'
+import PostAddForm from './components/PostAddForm'
 
-function Example() {
-    const myRef = useRef(null);
-    const counterRef = useRef(0);
-    const [text, setText] = useState('');
-    
-    useEffect(() => {
-        myRef.current?.focus();
-    },[]);
-        
-    const handlerFocus = () => {
-        if(myRef.current) {
-            myRef.current.focus();
-        }
-    };
-    
-    const handlerChange = (event) => {
-        setText(event.target.value);
+/*
+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())
     }
-    counterRef.current += 1;
-    return <div>
-        <input ref={myRef} text="text" /><br />
-        Количество рендров: {counterRef.current}<br />
-        <input text="text" onChange={handlerChange} value={text} />
-        <button onClick={handlerFocus}>Поставить фокус на поле</button>
-    </div>
-}
+})
+*/
 
-function ClickCounter() {
-    const countRef = useRef(0);
-    
-    function handlerClick() {
-        countRef.current += 1;
-        //alert(`Нажали ${countRef.current} раз.`);
-    }
-    return <button onClick={handlerClick}>Нажать</button>;
-}
-
-function TimerComponent() {
-    const timerIdRef = useRef(null);
-    
-    useEffect(() => {
-        timerIdRef.current = setTimeout(() => {
-            alert("Прошло 3 секунды");
-        }, 3000);
-        return () => {
-            clearTimeout(timerIdRef.current);
+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 PrevValue({ value }) {
-    const prevValueRef = useRef();
-    
-    useEffect(() => {
-        prevValueRef.current = value;
-    });
-    return (
-        <div>
-            Текущее значение: {value} <br />
-            Предыдущее значение: {prevValueRef.current}
-        </div>
-    )
-}
-
-function ScrollList() {
-    const listRef = useRef(null);
-    
-    const scrollToBottom = () => {
-        if(listRef.current) {
-            listRef.current.scrollTop = listRef.current.scrollHeight;
-        }
-    }
-        
-    return (
-        <>
-            <div ref={listRef} 
-               style={{height: 200, overflowY: 'auto', border: '1px solid black'}}>
-                {[...Array(20)].map((_,i)=>(
-                    <div key={i}>Элемент № {i + 1}</div>
-                ))}
-            </div>
-            <button onClick={scrollToBottom}>Прокрутить вниз</button>
-        </>
-    )
-}
-        
 function App() {
-    
-    
 	return (
 		<>
+			{/* Добавьте тестовый контент для проверки */}
 			<h1>Hello, React!</h1>
-            <ScrollList />
+        <QueryClientProvider client={createQueryClient}>
+            <PostAddForm />
+        </QueryClientProvider>
+            
 		</>
 	)
 }

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>
 )