Сделали компонент с фотографией

src/App.jsx

@@ -1,59 +1,58 @@
-import { memo, useState, useMemo } from 'react'
+import React from 'react'
 
-function memoize(fn) {
+class RandomUser extends React.Component {
-    const cache = new Map();
+    constructor(props) {
-    return function(...args) {
+        super(props)
-        const key = JSON.stringify(args);
+        this.state = { user: {} }
-        if (cache.has(key)) {
-            return cache.get(key);
     }
-        const result = fn.apply(this, args);
+    
-        cache.set(key,result);
+    componentDidMount() {
-        return result;
+        fetch('https://randomuser.me/api')
+        .then(responce => responce.json())
+        .then(json => this.setState({ user: json.results[0] }));
+        console.log('смонтирован')
     }
-}
     
-function fibonachi(n, memo={}) {
+    componentDidUpdate(prevProps,prevState) {
-    if (n in memo) {console.log(n);return memo[n];}
+        console.log(this.state);
-    if (n <= 1) return 1;
+        console.log('Компонент обнвлен')
-    memo[n] = fibonachi(n-1, memo) + fibonachi(n - 2, memo);
+    }
-    return memo[n];
-}
     
-const MyComponent = ({ value }) => {
+    componentWillUnmount() {
-    console.log('Rendring');
+        console.log('Компонент таймера размонтирован')
-    return <div>{value}</div>
+    }
-}
     
-const MemoizedComponent = memo(MyComponent);
+    render() {
-
+        return <div>
-const Child = memo(({ children }) => {
+            {this.state.user && 
-    console.log('Child component rendred');
+                this.state.user.name &&
-    return <div>{children}</div>;
+                (
-});
-
-const Parent = () => {
-    const [count,setCount] = useState(0);
-    const [text, setText] = useState('');
-    
-    const stableChild = useMemo(() => <span>Memo text</span>,[]);
-    
-    return (
                 <>
-            <Child>
+                    <h2>{this.state.user.name.first} {this.state.user.name.last}</h2>
-                {stableChild}
+                    <img src={this.state.user.picture.medium} />
-            </Child>
+                    <button onClick={() => {
-            <input type="text" onChange={(e) => setText(e.target.value)} value={text} />
+                        console.log('Загружаем ... ')
-            <button onClick={() => setCount(count + 1)}>Increment {count}</button>
+                        fetch('https://randomuser.me/api')
+                        .then(responce => responce.json())
+                        .then(json => this.setState({ user: json.results[0] }));
+                    }}>Загрузить нового</button>
                 </>
                 )
+            }
+            </div>
+    }
 }
 
 function App() {
+    const [showClock, setShowClock] = React.useState(true);
+    
 	return (
 		<>
-			<h1>Hello, React!</h1>
+			<h1>Домашнее задание: жизненый цикл</h1>
-            <Parent />
+            <button onClick={()=> setShowClock(!showClock)}>
+                {showClock ? 'Скрыть часы' : 'Показать часы' }
+            </button>
+            {showClock && <RandomUser />}
 		</>
 	)
 }