Сделали таймер

package-lock.json

@@ -8,10 +8,8 @@
       "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"
-        "zustand": "^5.0.14"
       },
       "devDependencies": {
         "@eslint/js": "^9.25.0",
@@ -1369,7 +1367,7 @@
       "version": "19.1.6",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.6.tgz",
       "integrity": "sha512-JeG0rEWak0N6Itr6QUx+X60uQmN+5t3j9r/OVDtWzFXKaj6kD1BwJzOksD0FF6iWxZlbE1kB0q9vtnU2ekqa1Q==",
-      "devOptional": true,
+      "dev": true,
       "license": "MIT",
       "dependencies": {
         "csstype": "^3.0.2"
@@ -1621,7 +1619,7 @@
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
       "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
-      "devOptional": true,
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/debug": {
@@ -2056,16 +2054,6 @@
         "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",
@@ -2806,35 +2794,6 @@
       "funding": {
         "url": "https://github.com/sponsors/sindresorhus"
       }
-    },
-    "node_modules/zustand": {
-      "version": "5.0.14",
-      "resolved": "https://registry.npmjs.org/zustand/-/zustand-5.0.14.tgz",
-      "integrity": "sha512-/8tAspM5LMPr28b3fwLYrtdj77ECpfZviaP75CMTnwO8ISyaE4GDIG/9rDDYq/cH9D2Xw2A2RXglLInmVBQB/g==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=12.20.0"
-      },
-      "peerDependencies": {
-        "@types/react": ">=18.0.0",
-        "immer": ">=9.0.6",
-        "react": ">=18.0.0",
-        "use-sync-external-store": ">=1.2.0"
-      },
-      "peerDependenciesMeta": {
-        "@types/react": {
-          "optional": true
-        },
-        "immer": {
-          "optional": true
-        },
-        "react": {
-          "optional": true
-        },
-        "use-sync-external-store": {
-          "optional": true
-        }
-      }
     }
   }
 }

package.json

@@ -10,10 +10,8 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "immer": "^11.1.8",
     "react": "^19.1.0",
-    "react-dom": "^19.1.0",
+    "react-dom": "^19.1.0"
-    "zustand": "^5.0.14"
   },
   "devDependencies": {
     "@eslint/js": "^9.25.0",

src/App.jsx

@@ -1,10 +1,108 @@
-import Quiz from './components/Quiz'
+import React from 'react'
+
+class MyComponent extends React.Component {
+    constructor(props) {
+        super(props);
+        this.state = { data: null };
+        this.handleClick = this.handleClick.bind(this);
+    }
+    
+    render() {
+        return (
+            <div>
+            {this.state.data ? (
+                    <div>Данные: {this.state.data}</div>
+                ) : (
+                    <div>Загрузка...</div>
+                )}
+                <button onClick={this.handleClick}>Обновить</button>
+            </div>
+        )
+    }
+    
+    componentDidMount() {
+        fetch('https://api.example.com/data')
+        .then(responce => responce.json())
+        .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);
+    
 	return (
 		<>
-			<h1>Практика по созданию списка задач</h1>
+			<h1>Таймер с классом</h1>
-            <Quiz />
+            <button onClick={()=>setShow(prev => !prev)}>{show ? 'Скрыть' : 'Показать'} таймер</button>
+            {show && <Timer />}
 		</>
 	)
 }

src/components/Question.jsx

@@ -1,31 +0,0 @@
-import { useState } from 'react'
-
-const Question = ({question, onSubmit}) => {
-    const [selectedOption,setSelectedOption] = useState('')
-    const handleSubmit = () => {
-        console.log(selectedOption);
-        if (selectedOption) onSubmit(selectedOption);
-    }
-    
-    return (
-        <div>
-            <h2>Вопрос {question.id}: {question.text}</h2>
-            <div>
-                {question.options.map((option, index)=>(
-                    <label key={index}>
-                        <input 
-                        type="radio" 
-                        name={`question-${question.id}`}
-                        value={option}
-                        checked={selectedOption === option}
-                        onChange={() => setSelectedOption(option)} />
-                        {option}
-                    </label>
-                ))}
-            </div>
-            <button onClick={handleSubmit} >Следующий вопрос</button>
-        </div>
-    )
-}
-
-export default Question

src/components/Quiz.jsx

@@ -1,35 +0,0 @@
-import useQuizStore from './store/useQuizStore'
-import Question from './Question'
-import Result from './Result'
-
-const Quiz = () => {
-    const {
-        questions,
-        currentQuestion,
-        userAswers,
-        isFinished,
-        submitAnswer,
-        goToNextQuestion,
-        restartQuiz,
-    } = useQuizStore();
-    
-    const handleAnswerSubmit = (anwser) => {
-        console.log('Yes')
-        submitAnswer(answer)
-        if (currentQuestion < questions.length - 1 ) {
-            goToNextQuestion()
-        }
-    }
-    if(isFinished) {
-        return (<Result />)
-    }
-    return (
-        <div className="quiz">
-            <Question 
-            question={questions[currentQuestion]} 
-            onSubmit={handleAnswerSubmit} />
-        </div>
-    )
-}
-
-export default Quiz

src/components/Result.jsx

@@ -1,9 +0,0 @@
-const Result = ({questions, userAswers, onRestart}) => {
-    return (
-        <div>
-            <h2>Результат</h2>
-            <button onClick={onRestart}>Начать заново</button>
-        </div>
-    )
-}
-export default Result

src/components/store/useQuizStore.jsx

@@ -1,36 +0,0 @@
-import { create } from 'zustand'
-
-const useQuizStore = create(set => ({
-    questions: [
-        {
-            id:1,
-            text: 'Сколько будет 2+2?',
-            options: ['3','4','2'],
-            correctAnswer: '4',
-        },
-        {
-            id:2,
-            text: 'Столица России?',
-            options: ['Москва','Париж','Лондон'],
-            correctAnswer: 'Москва',
-        },
-    ],
-    currentQuestion: 0,
-    userAnswer:[],
-    isFinished: false,
-    goToNextQuestion: () => set(state => ({
-            currentQuestion: state.currentQuestion + 1,
-    })),
-    submitAnswer: answer => set(state => {
-        const updatedAnswer = [...state.userAnswer, answer];
-        const isFinished = (state.currentQuestion >= state.questions.length - 1);
-        return {userAnswer: updatedAnswer, isFinished};
-    }),/*
-    restartQuiz: () => set({
-        currentQuestion: 0,
-        userAnswer: [],
-        isFinished: false
-    }),     */
-}))
-
-export default useQuizStore