i dont know

src/App.jsx

@@ -1,96 +1,44 @@
-import React from 'react'
+import { useMutation, QueryClientProvider, QueryClient } from '@tanstack/react-query'
-import styles from './App.module.scss'
+import PostAddForm from './components/PostAddForm'
 
-class Clock extends React.Component {
+/*
-    constructor(props) {
+const mutation = useMutation({
-        super(props);
+    mutationFn: newUser => {
-        this.state = { date: new Date() };
+        fetch('https://jsonplaceholder.typicode.com/users', {
+            method: 'GET',
+            headers: {'Content-type':'application/json'},
+            body: JSON.stringify(newUser),
+        }).then(res => res.json())
     }
-    componentDidMount() {
+})
-        this.timerId = setInterval( () => this.tick(), 1000);
+*/
-    }
-    componentWillUnmount() {
-        clearInterval(this.timerId)
-    }
-    tick() {
-        this.setState({ date: new Date() })
-    }
-    render() {
-        return <div>{this.state.date.toLocaleTimeString()}</div>
-    }
-}
 
-function Clock2() {
+const createQueryClient = () => {
-    const [date, setDate] = React.useState(new Date());
+    new QueryClient({
-    
+        defaultOptions: {
-    React.useEffect(()=>{
+            queries: {
-        const timerId = setInterval(()=> setDate(new Date()),1000);
+                staleTime: 5 * 60*1000,
-        return () => clearInterval(timerId);
+                retry: 1,
-    },[])
+                gcTime: 10*60*1000,
-    
+                refetchOnWindowFocus: false,
-    return <div>{date.toLocaleTimeString()}</div>
+            },
-}
+            mutations: {
-
+                retry:0,
-function MouseTracker() {
+                onError: error => {console.error('Mutation error:',error.message)}
-    const [x,setX] = React.useState(0);
+            }
-    const [y,setY] = React.useState(0);
-    
-    const mouseMoveHandler = event => {
-        setX(event.clientX);
-        setY(event.clientY);
-    }
-    
-    React.useEffect(()=>{
-        document.addEventListener('mousemove', mouseMoveHandler);
-        return () => {
-            document.removeEventListener('mousemove',mouseMoveHandler);
         }
-    },[]);
+    })
-    
-    return <div className={styles.container}>
-        <p>Координаты мыши:<br /> X:<b>{x}</b>, Y:<b>{y}</b></p>
-        </div>
-}
-
-function DataFetcher() {
-    const [posts,setPosts] = React.useState([]);
-    const [users,setUsers] = React.useState([]);
-    
-    const getPosts = async () => {
-        const response = await fetch('https://jsonplaceholder.typicode.com/posts');
-        const data = await response.json();
-        setUsers(data.reduce((acc, value) => {
-            if (!(value.userId in acc))
-                return [...acc,value.userId]
-            return acc
-        }))
-        console.log(users);
-        setPosts(data.slice(1,10));
-        
-    }
-    
-    React.useEffect(() => {
-        console.log("Компонент создан");
-        getPosts();
-        return () => {console.log("Компонент удален");setPosts([])};
-    },[])
-    
-    return <div><ol>{posts.map(post => <li id={post.id}>{post.title}</li>)}</ol></div>
 }
 
 function App() {
-    const [tracker,setTracker] = React.useState(false);
-    const [dataFetcher,setDataFetcher] = React.useState(false);
-    
 	return (
 		<>
+			{/* Добавьте тестовый контент для проверки */}
 			<h1>Hello, React!</h1>
-            <Clock />
+        <QueryClientProvider client={createQueryClient}>
-            <Clock2 />
+            <PostAddForm />
-            <button onClick={() => setTracker(!tracker)}>Показать/Скрыть трекер</button>
+        </QueryClientProvider>
-            { tracker && <MouseTracker /> }
+            
-            <button onClick={() => setDataFetcher(!dataFetcher)}>Показать/Скрыть посты</button>
-            { dataFetcher && <DataFetcher /> }
 		</>
 	)
 }

src/App.module.scss

@@ -1,11 +0,0 @@
-.container {
-    width: 300px;
-    height: 200px;
-    border: 2px dashed grey;
-    margin: 10px;
-    text-align: center;
-    p {
-        margin-top: 20%;
-    }
-}
-