indexo.dev

react.dev

.dev toplist crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 677 ms crawled 2026-05-18

US · 76.76.21.22 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
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.
Language
en
Canonical
https://react.dev/
Translations
  • en
  • es
  • fr
  • ja
  • ko
  • tr
  • zh-hans
Feeds

Open Graph

url
https://react.dev/
title
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.

Technology

CDN
Vercel
CMS
Next.js
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • 1fcf9ayyat-dsn.algolia.net×1
  • www.googletagmanager.com×1

Social

DNS records live

NS
  • edna.ns.cloudflare.com
  • norm.ns.cloudflare.com
TXT
  • google-site-verification=a5RC7LuUuYSWBrPBwybnA2bPZSh4aYEDbYEg7O4t9l4

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-15 to 2026-07-14
Expires in 55 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://react.dev/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=63072000

Links to (9)

Linked from (50)