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Vercel
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🐻 Bear necessities for state management in React
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react.dev
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Multilingual
Categories: Development
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.
Updated: 2026-09-01 10:54
Language: English (default)
Access: Normal
Profile views 5
Outbound visits 4
Website Overview
An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.
Domain and Registration
Registered in 2019, this domain has about 7 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .dev extension, which is not an independent safety signal.
DNS and Email
Nameservers are provided by Cloudflare, indicating managed DNS hosting. No CNAME was found; the observed records resolve directly to addresses. No MX record was found. A conventional explicit inbound-mail route is not configured. TXT records include verification markers for Google. Such markers may also remain after a service stops being used. DNSSEC signatures were not detected, so this additional DNS authenticity protection is not confirmed.
TLS and Certificates
The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.
HTTP and Browser Security
The response lacks these common security headers: CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, clickjacking protection. CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. No obvious internal addresses or debug information were found in the headers. The Server header contains the custom value Vercel.
Technology Stack Analysis
The public page identifies Next.js, React, Google Analytics, Vercel without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
The meta description has 260 characters and may be shortened in search results. Twitter Card metadata is configured. The page declares 8 language or regional alternatives using hreflang. The title has 5 characters, within a common display range. The observed directives allow indexing and link following.
Hosting and Email
Pages, Search and Sharing
| Meta 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. |
|---|---|
| Canonical URL | https://react.dev/ |
| Language | English (default) · Multilingual |
| Twitter Card | summary_large_image |
Social Sharing Preview
10 fieldsSharing metadata
| og:url | https://react.dev/ |
|---|---|
| og:type | website |
| og:image | https://react.dev/images/og-home.png |
| og:title | React |
| og: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. |
| twitter:card | summary_large_image |
| twitter:site | @reactjs |
| twitter:image | https://react.dev/images/og-home.png |
| twitter:title | React |
| twitter: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. |
robots.txt (opens in a new tab)
0 rulesAll bots 0 allowed · 0 disallowed
No matching rules.
Sitemaps
0No sitemaps found
Registration details RDAP / WHOIS
| Registrar | Key-Systems LLC |
|---|---|
| Registered | 2019-02-19 |
| Expires | 2028-02-19 |
| Domain status | client transfer prohibited |
| Nameservers | hattie.ns.cloudflare.com、junade.ns.cloudflare.com |
| DNSSEC | unsigned |
DNS records
TLS and certificates
| Assessment | Normal configuration |
|---|---|
| Supported protocols | TLSv1.2、TLSv1.3 |
| Negotiated protocol | TLSv1.3 |
| Certificate subject | react.dev |
| Issuer | Let's Encrypt |
| Valid until | 2026-11-14T01:44 · Remaining when checked: 73 days |
| Verification details | Certificate trust: Passed · Hostname match: Passed |
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| cache-control | public, max-age=0, must-revalidate |
| server | Vercel |
| strict-transport-security | max-age=63072000 |
| access-control-allow-origin | * |
Identified technologies
Next.jsReactGoogle AnalyticsVercel
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