- Introduction In this section, we’ll learn about Controlled Components in React. Controlled components are a technique used in React to manage the state of form elements, ensuring that they stay in sync with the application state. Let’s dive into a conversation between Geek and Gal to better understand the concept of controlled components!
Controlled components in React are a way to manage form elements by keeping their state in sync with the application state.
How does that work?
In a controlled component, the input value is controlled by the React state. When the input value changes, an event handler updates the state, and the input value is updated with the new state.
- Creating a Controlled Component
To create a controlled component, first, create a state variable for the input value. Then, add an event handler to update the state when the input value changes.
Can you show me an example?
Sure! Here's a simple example of a controlled component in React:
import React, { useState } from 'react';
function ControlledInput() {
const [inputValue, setInputValue] = useState('');
function handleChange(event) {
setInputValue(event.target.value);
}
return (
<input type="text" value={inputValue} onChange={handleChange} />
);
}
I see! We have an input element, a state variable to manage the input value, and an event handler to update the state when the input value changes.
Exactly! With controlled components, React manages the input value, making it easier to handle form data and validation.
- Hilarious Example
How about a funny example of using controlled components in React?
Sure thing! Let's create a controlled input component where you can enter your favorite dessert!
import React, { useState } from 'react';
function FavoriteDessert() {
const [dessert, setDessert] = useState('');
function handleChange(event) {
setDessert(event.target.value);
}
return (
<div>
<label>
Your favorite dessert:
<input type="text" value={dessert} onChange={handleChange} />
</label>
<p>Yummy! {dessert} is a delicious choice! 🍰🍨🍪</p>
</div>
);
}
Haha, that's awesome! A controlled input component to share your favorite dessert!
You got it! Controlled components make working with form data more fun and manageable!
- Conclusion Controlled Components in React are a powerful technique to manage form elements by keeping their state in sync with the application state. By using controlled components, you can handle form data and validation with ease, making your React applications more efficient and enjoyable to work with! 🌟