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Tạo một component ColorPicker trong ReactJS - Freetuts
REACTJS EXAMPLE
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
Tạo một component ColorPicker trong ReactJS
Trong bài này, mình sẽ tạo một component ColorPicker
chứa một biểu mẫu cho phép người dùng chọn màu từ một bảng màu và hiển thị màu đã chọn trong console.
Color Picker trong ReactJS
Mình sẽ bắt đầu bằng việc tạo một ứng dụng React mới và thêm component ColorPicker
vào đó.
Bước 1: Tạo một ứng dụng React mới
npx create-react-app react-color-picker
cd react-color-picker
Bước 2: Tạo component ColorPicker
Trong thư mục src, tạo một file mới có tên là ColorPicker.js.
File này sẽ chứa component ColorPicker
.
ColorPicker.js
import React, { useState } from 'react';
import './ColorPicker.css';
const ColorPicker = () => {
const [color, setColor] = useState('#ffffff');
const handleChange = (e) => {
setColor(e.target.value);
};
const handleSubmit = (e) => {
e.preventDefault();
console.log('Màu đã chọn:', color);
// Thêm logic xử lý màu đã chọn ở đây (ví dụ: gửi đến API, lưu vào state, ...)
};
return (
<div className="color-picker-container">
<form onSubmit={handleSubmit}>
<input
type="color"
value={color}
onChange={handleChange}
className="color-input"
/>
<button type="submit">Chọn Màu</button>
</form>
</div>
);
};
export default ColorPicker;
Bước 3: Tạo file CSS cho ColorPicker
Tạo một file CSS mới có tên là ColorPicker.css
trong thư mục src để trang trí giao diện của ColorPicker.
ColorPicker.css
.color-picker-container {
max-width: 300px;
margin: auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.color-input {
margin-right: 10px;
}
button {
background-color: #3498db;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background-color: #2980b9;
}
Bước 4: Sử dụng component ColorPicker trong App
Sửa nội dung file src/App.js để sử dụng component ColorPicker
.
App.js
import React from 'react';
import ColorPicker from './ColorPicker';
function App() {
return (
<div className="App">
<h1>React Color Picker Exercise</h1>
<ColorPicker />
</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 color picker cho phép bạn chọn màu sắc. Khi bạn chọn một màu và nhấn nút "Chọn Màu", màu đã chọn sẽ hiển thị trong console.
Kết bài
Với bài tập "Color Picker" này, mình đã tạo một color picker cho phép người dùng chọn màu sắc và hiển thị màu đã chọn trong console. CSS đã được kết hợp để tạo ra giao diện thân thiện và dễ sử dụng. 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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