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Simple List with Keys trong ReactJS - Freetuts
REACTJS EXAMPLE
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
Simple List with Keys trong ReactJS
Trong bài này, mình sẽ tạo một component SimpleListWithKeys
để hiển thị một danh sách các phần tử, với mỗi phần tử được gán một key duy nhất.
Tạo một component Simple List with Keys trong ReactJS
Mình sẽ bắt đầu bằng việc tạo một ứng dụng React mới và thêm component SimpleListWithKeys
vào đó.
Bước 1: Tạo một ứng dụng React mới
npx create-react-app react-simple-list
cd react-simple-list
Bước 2: Tạo component SimpleListWithKeys
Trong thư mục src
, tạo một file mới có tên là SimpleListWithKeys.js
. File này sẽ chứa component SimpleListWithKeys
.
SimpleListWithKeys.js
import React from 'react';
import './SimpleListWithKeys.css'; // Import CSS file
const SimpleListWithKeys = () => {
const data = ['Item 1', 'Item 2', 'Item 3', 'Item 4', 'Item 5'];
return (
<div>
<h2>Simple List with Keys</h2>
<ul className="simple-list"> {/* Add className for styling */}
{data.map((item, index) => (
<li key={index}>{item}</li>
))}
</ul>
</div>
);
};
export default SimpleListWithKeys;
Bước 3: Tạo file CSS cho SimpleListWithKeys (tuỳ chọn)
Nếu bạn muốn trang trí giao diện của SimpleListWithKeys
, bạn có thể tạo một file CSS mới.
SimpleListWithKeys.css
.simple-list {
list-style-type: none;
padding: 0;
}
.simple-list li {
margin-bottom: 10px;
background-color: #f8f9fa;
padding: 12px;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
transition: background-color 0.3s ease;
}
.simple-list li:hover {
background-color: aqua;
}
Bước 4: Sử dụng component SimpleListWithKeys trong App
Sửa nội dung file src/App.js
để sử dụng component SimpleListWithKeys
.
App.js
import React from 'react';
import SimpleListWithKeys from './SimpleListWithKeys';
function App() {
return (
<div className="App">
<h1>React Simple List with Keys Exercise</h1>
<SimpleListWithKeys />
</div>
);
}
export default App;
Bước 5: Chạy ứng dụng React
Quay lại terminal và chạy lệnh sau để khởi động ứng dụng React:
Mở trình duyệt và truy cập http://localhost:3000 để xem ứng dụng của bạn. Bạn sẽ thấy một danh sách các mục được hiển thị, với mỗi mục có một key duy nhất.
Kết bài:
Với bài tập "Simple List with Keys" này, mình đã tạo một danh sách đơn giản trong React với mỗi mục được gán một key duy nhất. Điều này giúp React hiểu và quản lý danh sách hiệu quả hơn. Hãy tiếp tục tìm hiểu và thực hành để làm quen với các tính năng khác của ReactJS và phát triển kỹ năng lập trình của bạn!
Bài giải
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