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Tạo một component FormSubmission trong ReactJS
REACTJS EXAMPLE
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
Tạo một component FormSubmission trong ReactJS
Trong bài tập này, mình sẽ tạo một component FormSubmission để thực hành xử lý sự kiện khi người dùng điền và submit một biểu mẫu. Mình sẽ tạo một biểu mẫu đơn giản với các trường nhập liệu cho tên người dùng và email. Khi người dùng nhấn nút "Submit", giá trị nhập liệu sẽ hiển thị trong console.
Component FormSubmission trong ReactJS
Bước 1: Tạo Component FormSubmission
FormSubmission.js
// src/components/FormSubmission.js
import React, { useState } from 'react';
import './FormSubmission.css';
const FormSubmission = () => {
const [formData, setFormData] = useState({
username: '',
email: '',
});
const handleChange = (e) => {
setFormData({
...formData,
[e.target.name]: e.target.value,
});
};
const handleSubmit = (e) => {
e.preventDefault();
console.log('Form submitted:', formData);
};
return (
<form className="form-submission" onSubmit={handleSubmit}>
<label htmlFor="usernameInput">Username:</label>
<input
type="text"
id="usernameInput"
name="username"
value={formData.username}
onChange={handleChange}
/>
<label htmlFor="emailInput">Email:</label>
<input
type="email"
id="emailInput"
name="email"
value={formData.email}
onChange={handleChange}
/>
<button type="submit">Submit</button>
</form>
);
};
export default FormSubmission;
Bước 2: Định dạng CSS cho Đẹp Mắt
FormSubmission.css
/* src/components/FormSubmission.css */
.form-submission {
max-width: 300px;
margin: 20px auto;
}
label {
display: block;
margin-bottom: 5px;
}
input {
width: 100%;
padding: 8px;
margin-bottom: 10px;
}
button {
background-color: #4caf50;
color: white;
padding: 10px;
border: none;
cursor: pointer;
}
Bước 3: Tích hợp Component vào App
App.js
// src/App.js
import React from 'react';
import FormSubmission from './components/FormSubmission';
import './App.css';
function App() {
return (
<div className="App">
<header className="App-header">
<FormSubmission />
</header>
</div>
);
}
export default App;
Bước 4: Kiểm tra hiệu quả
Chạy ứng dụng React và kiểm tra xem giá trị nhập từ ô nhập liệu có xuất hiện trong console khi bạn nhấn nút "Submit" hay không.
Lưu ý: Đảm bảo bạn đã tạo các file CSS và App.js được tạo mặc định bởi Create React App và có thể điều chỉnh chúng theo ý muốn của bạn.
Bài tập này giúp bạn làm quen với xử lý sự kiện trong ReactJS, đặc biệt là khi người dùng interact với các biểu mẫu. Hãy thực hành và tìm hiểu thêm về cách ReactJS giúp quản lý sự kiện một cách hiệu quả.
Bài giải
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