How does PageSourceSearch know what jestjs-jest-preview-prod.vercel.app is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of jestjs-jest-preview-prod.vercel.app go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from jestjs-jest-preview-prod.vercel.app?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as jestjs-jest-preview-prod.vercel.app?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

jestjs-jest-preview-prod.vercel.app

Built with gtag, instantsearch.js 4.118.0, algoliasearch.zendesk-hc 3.0.0, swagger-ui-dist 5.33.0, @inkeep/cxkit-js 0.5.119, @reachfive/identity-ui 2.1.0, @cognigy/webchat 3.50.0, @vitest/utils 5.0.2, @collectionspace/cspace-public-browser 4.0.0, @ant-design/x 2.9.0, cobrowse-sdk-js 3.28.7, @inkeep/agents-ui-js-cloud 0.17.8 and more. 5 pages and 201 stored files, last crawled 2026-10-03.

15 libraries 1 identifier 140 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
gtag		2026-10-03
instantsearch.js	4.118.0	2026-10-03
algoliasearch.zendesk-hc	3.0.0	2026-10-03
swagger-ui-dist	5.33.0	2026-10-03
@inkeep/cxkit-js	0.5.119	2026-10-03
@reachfive/identity-ui	2.1.0	2026-10-03
@cognigy/webchat	3.50.0	2026-10-03
@vitest/utils	5.0.2	2026-10-03
@collectionspace/cspace-public-browser	4.0.0	2026-10-03
@ant-design/x	2.9.0	2026-10-03
cobrowse-sdk-js	3.28.7	2026-10-03
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-03
@chainlink/cl-search-frontend	0.13.2	2026-10-03
@progress/kendo-date-math	1.5.17	2026-10-03
@wix/image	1.454.0	2026-10-03

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Universal Analytics property id (Google)	UA-44373548-17	view source

Third-party hosts

Hosts outside jestjs-jest-preview-prod.vercel.app that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
2018.stateofjs.com	connect	view source
2019.stateofjs.com	connect	view source
2020.stateofjs.com	connect	view source
academy.plot.ly	connect	view source
alexjoverm.github.io	connect	view source
archive.jestjs.io	connect	view source
artsy.github.io	connect	view source
aws.amazon.com	connect	view source
babeljs.io	connect	view source
bazel.build	connect	view source
benjaminbrandt.com	connect	view source
benmccormick.org	connect	view source
blog.callstack.io	connect	view source
blog.grommet.io	connect	view source
blog.jetbrains.com	connect	view source
browniefed.com	connect	view source
bylaws.openjsf.org	connect	view source
callstack.com	connect	view source
chaijs.com	connect	view source
code-of-conduct.openjsf.org	connect	view source
code.visualstudio.com	connect	view source
cpojer.net	connect	view source
create-react-app.dev	connect	view source
crowdin.com	connect	view source
datadoghq.com	connect	view source
developer.mozilla.org	connect	view source
developers.facebook.com	connect	view source
discord.gg	connect	view source
docs.aws.amazon.com	connect	view source
docs.nestjs.com	connect	view source
docs.npmjs.com	connect	view source
docusaurus.io	connect	view source
dwatow.github.io	connect	view source
egghead.io	connect	view source
en.wikipedia.org	connect	view source
engineering.haus.com	connect	view source
enzymejs.github.io	connect	view source
esbuild.github.io	connect	view source
eslint.org	connect	view source
example.com	connect	view source
facebook.com	connect	view source
facebook.github.io	connect	view source
flowtype.org	connect	view source
gist.github.com	connect	view source
git-scm.com	connect	view source
github.com	connect	view source
google.com	connect	view source
googleads.g.doubleclick.net	connect	view source
guigrpa.github.io	connect	view source
happo.io	connect	view source
i.ytimg.com	connect	view source
images.opencollective.com	connect	view source
img.youtube.com	connect	view source
jasmine.github.io	connect	view source
jdlt.co.uk	connect	view source
jest-archive-august-2023.netlify.app	connect	view source
jestjs.io	connect	view source
kulshekhar.github.io	connect	view source
lernajs.io	connect	view source
medium.com	connect	view source
medium.freecodecamp.com	connect	view source
mfbtech.com	connect	view source
mochajs.org	connect	view source
moxio.com	connect	view source
news.ycombinator.com	connect	view source
nextjs.org	connect	view source
nodejs.org	connect	view source
npmjs.com	connect	view source
nuclide.io	connect	view source
opencollective.com	connect	view source
openjsf.org	connect	view source
opensource.facebook.com	connect	view source
parceljs.org	connect	view source
pksjce.github.io	connect	view source
posthog.com	connect	view source
prettier.io	connect	view source
privacy-policy.openjsf.org	connect	view source
reactjs.org	connect	view source
reactnative.dev	connect	view source
redux.js.org	connect	view source
regex101.com	connect	view source
repl.it	connect	view source
schema.org	connect	view source
scrapcartorontoshop.ca	connect	view source
sebastienlorber.com	connect	view source
semaphoreci.com	connect	view source
sinonjs.org	connect	view source
spockframework.org	connect	view source
stackoverflow.com	connect	view source
static.doubleclick.net	connect	view source
terms-of-use.openjsf.org	connect	view source
testing-library.com	connect	view source
trademark-list.openjsf.org	connect	view source
trademark-policy.openjsf.org	connect	view source
twitter.com	connect	view source
unpkg.com	connect	view source
v1.docusaurus.io	connect	view source
v2.docusaurus.io	connect	view source
v8.dev	connect	view source
vitejs.dev	connect	view source
vitest.dev	connect	view source
voice.kadira.io	connect	view source
webdriver.io	connect	view source
webpack.js.org	connect	view source
website.com	connect	view source
www.airbnb.com	connect	view source
www.albertgao.com	connect	view source
www.algolia.com	connect	view source
www.appdrawn.com	connect	view source
www.facebook.com	connect	view source
www.fuller-inc.com	connect	view source
www.gatsbyjs.com	connect	view source
www.google.com	connect	view source
www.googletagmanager.com	script	view source
www.graphcommerce.org	connect	view source
www.instagram.com	connect	view source
www.jetbrains.com	connect	view source
www.lindenphotonics.com	connect	view source
www.linuxfoundation.org	connect	view source
www.mongodb.com	connect	view source
www.multiquotetime.com	connect	view source
www.npmjs.com	connect	view source
www.nytimes.com	connect	view source
www.playretrogames.com	connect	view source
www.principal.com	connect	view source
www.reachdigital.nl	connect	view source
www.reactiflux.com	connect	view source
www.snowpack.dev	connect	view source
www.softermii.com	connect	view source
www.spotify.com	connect	view source
www.thordata.com	connect	view source
www.twitter.com	connect	view source
www.typescriptlang.org	connect	view source
www.viget.com	connect	view source
www.w3.org	connect	view source
www.xfive.co	connect	view source
www.youtube-nocookie.com	connect	view source
www.youtube.com	connect	view source
yarnpkg.com	connect	view source
youtu.be	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 201) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://jestjs-jest-preview-prod.vercel.app/assets/js/5725.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
https://www.googletagmanager.com/gtag/js?id=UA-44373548-17	js library	not fetched	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/5249.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/5085.57f342e0.js	js	21.1 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/4773.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/4737.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
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https://jestjs-jest-preview-prod.vercel.app/assets/js/3048.700494a3.js	js	5.8 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/2868.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/2392.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
https://jestjs-jest-preview-prod.vercel.app/assets/js/1880.3e5aa33e.js	js	8.2 KB	2026-10-03	2026-10-03
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Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-03 first crawl

5 pages, 201 files, 4.4 MB; 15 libraries, 1 identifier, 140 third-party hosts
15 libraries added
- gtag
- @vitest/utils 5.0.2
- cobrowse-sdk-js 3.28.7
- @collectionspace/cspace-public-browser 4.0.0
- @ant-design/x 2.9.0
- @cognigy/webchat 3.50.0
- @reachfive/identity-ui 2.1.0
- swagger-ui-dist 5.33.0
- @wix/image 1.454.0
- @inkeep/cxkit-js 0.5.119
- @chainlink/cl-search-frontend 0.13.2
- @inkeep/agents-ui-js-cloud 0.17.8
- and 3 more
1 identifier added
- UA-44373548-17 Universal Analytics property id
140 third-party hosts added
- www.googletagmanager.com
- docusaurus.io
- jestjs.io
- www.w3.org
- reactjs.org
- github.com
- opensource.facebook.com
- jest-archive-august-2023.netlify.app
- archive.jestjs.io
- stackoverflow.com
- www.reactiflux.com
- twitter.com
- and 128 more
201 files added

Questions about jestjs-jest-preview-prod.vercel.app

How does PageSourceSearch know what jestjs-jest-preview-prod.vercel.app is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of jestjs-jest-preview-prod.vercel.app go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from jestjs-jest-preview-prod.vercel.app?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as jestjs-jest-preview-prod.vercel.app?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.