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7 Commits

8 changed files with 214 additions and 70 deletions
+13
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@@ -5,6 +5,19 @@
<link rel="icon" type="image/svg+xml" href="/vite.svg" /> <link rel="icon" type="image/svg+xml" href="/vite.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite + React</title> <title>Vite + React</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: Arial, Helvetica, sans-serif;
}
body {
background-color: #ecfeff;
}
</style>
</head> </head>
<body> <body>
<div id="root"></div> <div id="root"></div>
+11
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@@ -20,6 +20,7 @@
"eslint-plugin-react-hooks": "^5.2.0", "eslint-plugin-react-hooks": "^5.2.0",
"eslint-plugin-react-refresh": "^0.4.19", "eslint-plugin-react-refresh": "^0.4.19",
"globals": "^16.0.0", "globals": "^16.0.0",
"react-icons": "^5.6.0",
"vite": "^6.3.5" "vite": "^6.3.5"
} }
}, },
@@ -2461,6 +2462,16 @@
"react": "^19.1.0" "react": "^19.1.0"
} }
}, },
"node_modules/react-icons": {
"version": "5.6.0",
"resolved": "https://registry.npmjs.org/react-icons/-/react-icons-5.6.0.tgz",
"integrity": "sha512-RH93p5ki6LfOiIt0UtDyNg/cee+HLVR6cHHtW3wALfo+eOHTp8RnU2kRkI6E+H19zMIs03DyxUG/GfZMOGvmiA==",
"dev": true,
"license": "MIT",
"peerDependencies": {
"react": "*"
}
},
"node_modules/react-refresh": { "node_modules/react-refresh": {
"version": "0.17.0", "version": "0.17.0",
"resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.17.0.tgz", "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.17.0.tgz",
+2 -1
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@@ -4,7 +4,7 @@
"version": "0.0.0", "version": "0.0.0",
"type": "module", "type": "module",
"scripts": { "scripts": {
"dev": "vite", "dev": "vite",
"build": "vite build", "build": "vite build",
"lint": "eslint .", "lint": "eslint .",
"preview": "vite preview" "preview": "vite preview"
@@ -22,6 +22,7 @@
"eslint-plugin-react-hooks": "^5.2.0", "eslint-plugin-react-hooks": "^5.2.0",
"eslint-plugin-react-refresh": "^0.4.19", "eslint-plugin-react-refresh": "^0.4.19",
"globals": "^16.0.0", "globals": "^16.0.0",
"react-icons": "^5.6.0",
"vite": "^6.3.5" "vite": "^6.3.5"
} }
} }
+58 -68
View File
@@ -1,82 +1,72 @@
import memo, { useMemo, useCallback, useState } from 'react' import styles from './App.module.css'
import SneakersImage from './assets/images/sneakers-image.jpg'
import { FaRegUser } from 'react-icons/fa'
function MyComponent() { function handleClick(i) {
const [count, setCount] = useState(0); console.log(i);
const [name, setName] = useState('John');
const greeting = useMemo(() => `Hello, ${name}!`,[name]);
return (
<>
<h2>{greeting}</h2>
<button onClick={()=>setName('Alex')}>New name</button>
</>
)
} }
function MyComponent2() { function Header() {
const [data,setData] = useState([{theme:'light'}]) const handleChange = event => {
const userPreferences = useMemo(()=>({theme: 'dark', language: 'en'}),[]); const newValue = event.target.value;
console.log(`Новое значение ${newValue}`);
const processData = useMemo(()=>{ }
return data.map(item => ({ ...item,theme: userPreferences.theme }))
},[data, userPreferences]);
console.log(processData);
return ( return (
<> <header className={styles.header}>
<h2 className={data.theme}>2</h2> <div>
<button onClick={()=>setData(data)}>set new theme</button> <h2>Store</h2>
</> <input type='text ' placeholder='Search...' onChange={handleChange} />
) </div>
<div>
<FaRegUser size={24} color='#3258e3' />
<button>Profile</button>
</div>
</header>
)
} }
function MyComponent3() { function Product() {
const sum = useMemo(()=> a+b,[a,b]);//Бессмысленное применение и вредное const handlerMouseEnter = event => {
const img = event.target;
//Применение оправдано img.style.border = '5px solid yellow';
const complexResult = useMemo(()=>{ }
return heavyMethOperations(largeDataSet); const handlerMouseOut = event => {
},[largeDataSet]) const img = event.target;
} img.style.border = '';
console.log(event);
function ParentComponent({ items }) { }
const [filter, setFilter] = useState(''); return (
<div className={styles.product}>
const listProps = useMemo(()=>({ <img src={SneakersImage} alt='' onMouseEnter={handlerMouseEnter} onMouseOut={handlerMouseOut} />
items: items.filter(item => item.name.includes(filter)), <div className={styles.content}>
onItemClick: id => console.log('Clicked',id), <div className={styles.title}>
theme: 'dark' <h4>Sneakers Red & White 2025</h4>
}),[items,filter]); <button onClick={() => handleClick(0)} onMouseEnter={handlerMouseEnter} onMouseOut={handlerMouseOut}>+</button>
</div>
return ( <p className={styles.description}>NIKE</p>
<> <p className={styles.price}>$38.00</p>
<Memoized {...listProps} /> </div>
<button onClick={()=>setFilter('Bob')}>Click</button> </div>
</> )
)
}
function Memoized(props) {
console.log(props);
return (
<>
<h3 className={props.theme}>Memoized</h3>
{props.items.map((item) => (
<>
<li>
{item.name}
</li>
</>))}
</>
)
} }
function App() { function App() {
return ( return (
<> <>
{/* Добавьте тестовый контент для проверки */} <div className={styles.container}>
<h1>Hello, React!</h1> <Header />
<ParentComponent items={[{name:'Alex'},{name:'Bob'}]} /> <ul className={styles.list}>
<li>
<Product />
</li>
<li>
<Product />
</li>
<li>
<Product />
</li>
</ul>
</div>
</> </>
) )
} }
+123
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@@ -0,0 +1,123 @@
@use './assets/styles/variables' as *;
.header {
display: flex;
justify-content: space-between;
align-items: center;
padding: 20px;
background-color: white;
border-bottom-left-radius: 10px;
border-bottom-right-radius: 10px;
div {
&:first-child {
display: flex;
align-items: center;
gap: 20px;
h2 {
color: $primary-color;
}
input {
border-radius: 5px;
outline: none;
font-size: 16px;
border: 1px solid gainsboro;
padding: 5px 10px;
&:focus {
border: 1px solid $primary-color;
}
}
}
&:last-child {
display: flex;
align-items: center;
gap: 10px;
button {
outline: 0;
border: 0;
border-radius: 5px;
padding: 5px 15px;
font-size: 16px;
background-color: $primary-color;
color: $white-color;
font-weight: 600;
cursor: pointer;
&:hover {
background-color: $seconday-color;
}
}
}
}
}
.container {
max-width: 1220px;
margin: 0 auto;
}
.list {
display: flex;
justify-content: space-between;
border-radius: 10px;
margin-top: 100px; /* временно */
padding: 20px;
background-color: white;
list-style: none;
}
.product {
display: flex;
flex-direction: column;
width: 350px;
gap: 20px;
border-radius: 10px;
}
.content {
display: flex;
flex-direction: column;
gap: 10px;
}
.title {
display: flex;
justify-content: space-between;
align-items: center;
h4 {
font-size: 18px;
}
button {
background-color: black;
color: white;
border: 0;
border-radius: 50%;
outline: 0;
font-size: 20px;
padding: 5px 10px;
cursor: pointer;
}
}
img {
border-radius: 10px;
}
.description {
color: gray;
}
.price {
font-weight: bold;
}
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+5
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@@ -0,0 +1,5 @@
$white-color: white;
$black-color: black;
$primary-color: #3258e3;
$seconday-color: #4432e3;
+2 -1
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@@ -1,8 +1,9 @@
import { StrictMode } from 'react' import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client' import { createRoot } from 'react-dom/client'
// удаляем import './index.css'
import App from './App.jsx' import App from './App.jsx'
createRoot(document.getElementById('root')).render( createRoot(document.getElementById('root')).render(
<StrictMode>
<App /> <App />
</StrictMode>
) )