Informations principales

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Titre: React

Description: React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations.

Mots-clés: unknown

Encodage des pages: utf-8

Taille du fichier de page: 266 KB

Informations sur le serveur

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IP: 66.33.60.194

Emplacement: United States,US,,,37.751,-97.822,America/Chicago

Serveur HTTP: vercel

Codage: utf-8

Liste des balises méta

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charset: utf-8 head:
name: viewport content: width=device-width, initial-scale=1 head:
name: description content: React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. head:
property: fb:app_id content: 623268441017527 head:
property: og:type content: website head:
property: og:url content: https://react.dev/ head:
property: og:title content: React head:
property: og:description content: React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. head:
property: og:image content: https://react.dev/images/og-home.png head:
name: twitter:card content: summary_large_image head:
name: twitter:site content: @reactjs head:
name: twitter:creator content: @reactjs head:
name: twitter:title content: React head:
name: twitter:description content: React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. head:
name: twitter:image content: https://react.dev/images/og-home.png head:
name: google-site-verification content: sIlAGs48RulR4DdP95YSWNKZIEtCqQmRjzn-Zq-CcD0 head:
name: msapplication-TileColor content: #2b5797
name: theme-color content: #23272f

Liens internes

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Liens externes

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Informations Whois

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domain_name: react.dev

update_date: 2025-11-27T09:00:28.109Z

update_time: 1764234028

creation_date: 2019-02-19T22:23:10.403Z

creation_time: 1550614990

expiration_date: 2027-02-19T22:23:10.403Z

Données brutes Whois

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            Domain Name: REACT.DEV
Registrar: RegistrarSEC, LLC
Domain Status: client delete prohibited
Domain Status: client transfer prohibited
Domain Status: client update prohibited
Creation Date: 2019-02-19T22:23:10.403Z
Registry Expiry Date: 2027-02-19T22:23:10.403Z
Updated Date: 2025-11-27T09:00:28.109Z
Name Server: EDNA.NS.CLOUDFLARE.COM
Name Server: NORM.NS.CLOUDFLARE.COM
REGISTRAR Contact: RegistrarSEC, LLC
>>> Last update of RDAP database: 2026-01-25T19:30:00Z

Robots.txt

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			User-agent: *
Disallow:

Audit SEO

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Référencement technique

✓

Code de réponse

200

Statut 200 OK - la page se charge correctement.

✓

Codage des caractères

Page: utf-8, Header: utf-8

Codage des caractères cohérent entre le HTML et les en-têtes.

✓

Taille des pages

272543 bytes

Taille de page acceptable pour un chargement rapide.

!

Ressources

108 total

Trop de ressources. Optimisez et combinez les fichiers pour de meilleures performances.

✓

Hreflang balises

8 hreflang tags

Balises Hreflang trouvées pour le référencement multilingue.

✓

Robots.txt

Exists

Fichier Robots.txt trouvé.

!

Sitemap

Not found

Ajoutez sitemap.xml et référencez-le dans robots.txt.

✓

HTTPS

Yes

Connexion HTTPS sécurisée activée.

!

Compression

br

Activez la compression gzip ou zstd pour réduire la taille des fichiers.

✓

Mise en cache

public, max-age=0, must-revalidate

Les en-têtes de contrôle du cache sont correctement définis.

✓

Vitesse des pages

0.53 ms

Excellente vitesse de chargement.

Référencement sur la page

!

Titre

React

Titre trop court. Développez jusqu'à 30 à 60 caractères pour un meilleur référencement.

!

Méta-description

React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. Lenght:260

Méta description trop longue. Réduisez à 100-160 caractères.

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Titre H1

2 found - "React"

Utilisez un seul titre H1 par page. Supprimez les balises H1 supplémentaires.

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Nombre de mots

785

Bonne longueur de contenu (500 à 2 000 mots recommandés).

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Balise canonique

Ajoutez une balise canonique pour éviter les problèmes de contenu en double.

✓

Méta en double

[]

Aucune balise méta en double trouvée.

✓

Mots-clés

unknown

Ensemble de méta-mots-clés (remarque : non utilisé par les principaux moteurs de recherche).

Contenu et UX

✓

Langue

en

Attribut de langue correctement défini.

!

Images

35 total, 24 missing ALT

Ajoutez du texte ALT aux images pour l'accessibilité et le référencement.

✓

Fenêtre

width=device-width, initial-scale=1

Balise méta Viewport correctement définie pour les appareils mobiles.

✓

Ouvrir le graphique

All OG tags present.

Toutes les balises OpenGraph essentielles présentes.

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Données structurées

0 JSON-LD scripts

Ajoutez des données structurées (JSON-LD) pour des extraits enrichis et un meilleur référencement.

Expressions de recherche - Google

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Position	Phrase	Page	Fragment
1	use event	/reference/react/useEffectEvent	useEffectEvent useEffectEvent is a React Hook that lets you extract non-reactive logic from your Effects into a reusable function called an Effect Event. ... Use for non- ...
1	react	/	React React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript.
2	are read	/	React React lets you build user interfaces out of individual pieces called components. Create your own React components like Thumbnail, LikeButton, and Video.
4	input content	/reference/react-dom/components/input	– React To display an input, render an component. By default, it will be a text input. You can pass type="checkbox" for a checkbox, type="radio" for a radio ...
7	children 2	/reference/react/Children	Children Children lets you manipulate and transform the JSX you received as the children prop. const mappedChildren = Children.map(children, child => 9	form use	/reference/react-dom/components/form	form The built-in browser < form > component lets you create interactive controls for submitting information.
11	html components	/reference/react-dom/components	React DOM Components React supports all of the browser built-in HTML and SVG components . Common components All of the built-in browser components support some props and events.
12	html ref	/learn/referencing-values-with-refs	Referencing Values with Refs When you want a component to “remember” some information, but you don't want that information to trigger new renders, you can use a ref . You will learn. How to ...
14	imgur com	/learn/writing-markup-with-jsx	Writing Markup with JSX JSX is a syntax extension for JavaScript that lets you write HTML-like markup inside a JavaScript file. Although there are other ways to write components, ...
16	javascript view	/	React React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript.

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Informations principales

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Données brutes Whois

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Audit SEO

Référencement technique

Référencement sur la page

Contenu et UX

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Expressions de recherche - Google

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