react.js
Open source front end javascript libraryreact.js
A JavaScript library for building user interfacesreact.js
class ShoppingList extends React.Component {
render() {
return (
<div className="shopping-list">
<h1>Shopping List for {this.props.name}</h1>
<ul>
<li>Instagram</li>
<li>WhatsApp</li>
<li>Oculus</li>
</ul>
</div>
);
}
}
// Example usage: <ShoppingList name="Mark" />react js
function Cart() {
const monsteraPrice = 8
const [cart, updateCart] = useState(0)
const [isOpen, setIsOpen] = useState(false)
return isOpen ? (
<div className='lmj-cart'>
<button onClick={() => setIsOpen(false)}>Fermer</button>
<h2>Panier</h2>
<div>
Monstera : {monsteraPrice}€
<button onClick={() => updateCart(cart + 1)}>
Ajouter
</button>
</div>
<h3>Total : {monsteraPrice * cart}€</h3>
</div>
) : (
<button onClick={() => setIsOpen(true)}>Ouvrir le Panier</button>
)
}reactjs
import React, { useState, useEffect } from 'react';
function Example() {
const [count, setCount] = useState(0);
// Similaire à componentDidMount et componentDidUpdate : useEffect(() => { // Met à jour le titre du document via l’API du navigateur document.title = `Vous avez cliqué ${count} fois`; });
return (
<div>
<p>Vous avez cliqué {count} fois</p>
<button onClick={() => setCount(count + 1)}>
Cliquez ici
</button>
</div>
);
}Copyright © 2021 Codeinu
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