Сделали практику с кнопками Увеличить Уменьшить счетчик

package.json

@@ -10,6 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "info": "^1.0.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },
@@ -22,6 +23,8 @@
     "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

@@ -1,108 +1,29 @@
-import React from 'react'
+import styles from './styles/App.module.scss'
+import React, { useState, useCallback } from 'react'
 
-class MyComponent extends React.Component {
+function CounterButton({label, onClick}) {
-    constructor(props) {
-        super(props);
-        this.state = { data: null };
-        this.handleClick = this.handleClick.bind(this);
-    }
-    
-    render() {
     return (
-            <div>
+        <button onClick={onClick} className={styles.counter_button}>{label}</button>
-            {this.state.data ? (
-                    <div>Данные: {this.state.data}</div>
-                ) : (
-                    <div>Загрузка...</div>
-                )}
-                <button onClick={this.handleClick}>Обновить</button>
-            </div>
     )
 }
-    
+function CounterDisplay({value}) {
-    componentDidMount() {
+    return (<div className={styles.counter_display}>
-        fetch('https://api.example.com/data')
+            Значение счетчика: <b>{value}</b>
-        .then(responce => responce.json())
+    </div>)
-        .then(json => this.setState({data: json}));
-        
-        this.timerId = setInterval(()=> console.log('Tick'), 1000);
-    }
-    
-    componentWillUnmout() {
-        clearInterval(this.timerId);
-    }
-    
-    handleClick() {
-        this.setState({data: 'Данные'})
-    }
-}
-
-class MyComponent2 extends React.Component {
-    controller = new AbortController()
-
-    componentDidMount() {
-        fetch('https://api.example.com/data',{ singnal: this.controller.signal })
-        .then(responce => responce.json())
-        .then(json => this.setState({data: json}))
-        .catch(error => {
-            if(error.name == 'AbortError') {
-                console.log('Aborted');
-            } else {
-                console.log('Other error',error);
-            }
-        });
-    }
-
-    componentWillUnmount() {
-        this.controller.abort()
-    }
-}
-class MyComponent3 extends React.Component {
-    componentDidMount() {
-        this.loadData();
-    }
-    
-    async loadData() {
-        try {
-            const response = await fetch('https://api.example.com/data');
-            const data = await response.json();
-            this.setSate({ data });
-        } catch {
-            console.log('error');
-        }
-    }
-}
-
-class Timer extends React.Component {
-    constructor(props) {
-        super(props);
-        this.state = { seconds: 0 }
-    }
-    
-    componentDidMount() {
-        console.log('Timer mounted');
-        this.interval = setInterval(()=>{
-            this.setState(prevState => ({seconds: prevState.seconds + 1}))
-        },1000);
-    }
-    
-    componentWillUnmount() {
-        console.log('Timer unmount');
-        clearInterval(this.interval);
-    }
-    render() {
-        return <h2>Прошло секунд: {this.state.seconds}</h2>
-    }
 }
 
 function App() {
-    const [show,setShow] = React.useState(true);
+    const [counter,setCounter] = useState(0);
+    
+    const increment = () => setCounter(prev => prev + 1);
+    const decrement = () => setCounter(prev => prev - 1);
     
 	return (
 		<>
-			<h1>Таймер с классом</h1>
+            <h2>Практика по созданию счетчика с колбэками</h2>
-            <button onClick={()=>setShow(prev => !prev)}>{show ? 'Скрыть' : 'Показать'} таймер</button>
+            <CounterButton label="Увеличить" onClick={increment} />
-            {show && <Timer />}
+            <CounterButton label="уменьшить" onClick={decrement} />
+            <CounterDisplay value={counter} />
 		</>
 	)
 }

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>
 )