Websites using React 18+ (hydrateRoot)
React 18 and later hydrate server-rendered markup with the hydrateRoot API. About 407,963 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is React 18+ (hydrateRoot) detected?
The name hydrateRoot is exported by react-dom 18+ and called by server-rendered apps, so it appears in any site bundle that ships React 18 or later. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
hydrateRoot Search the index for it
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About React 18+ (hydrateRoot)
Top 50 websites using React 18+ (hydrateRoot)
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-10-04 15:20:40 UTC.
How it appears in the source
From github.com (js):
ance.mark(Z),a=r(es?eu:ec),ei?(0,P.default.startTransition)(()=>{ei.render(a)}):(ei=b.default.hydrateRoot(t,a,{onRecoverableError:B.onRecoverableError}),es=!1),m}async function ep(e){if(e.err&&(void 0
Questions about finding React 18+ (hydrateRoot)
- How does PageSourceSearch know a website uses React 18+ (hydrateRoot)?
- By the source itself: The name hydrateRoot is exported by react-dom 18+ and called by server-rendered apps, so it appears in any site bundle that ships React 18 or later. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
- Is this a complete list of websites using React 18+ (hydrateRoot)?
- No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 407,963 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
- How do I find websites that use React 18+ (hydrateRoot) together with another technology?
- Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example hydrateRoot with wp-content/plugins/ lists the WordPress sites that use React 18+ (hydrateRoot).