How does PageSourceSearch know what heypolls.netlify.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 heypolls.netlify.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 heypolls.netlify.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 heypolls.netlify.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

heypolls.netlify.app

Built with react, classnames, webpack, lodash, firebase, react-dom, prismjs, @firebase/firestore, regenerator-runtime, @babel/runtime, webfontloader, tslib and more. 1 page and 4 stored files, last crawled 2026-10-03.

135 libraries 0 identifiers 11 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
react		2026-10-03
classnames		2026-10-03
webpack		2026-10-03
lodash		2026-10-03
firebase		2026-10-03
react-dom		2026-10-03
prismjs		2026-10-03
@firebase/firestore		2026-10-03
regenerator-runtime		2026-10-03
@babel/runtime		2026-10-03
webfontloader		2026-10-03
tslib		2026-10-03
codemirror		2026-10-03
sockjs-client		2026-10-03
scheduler		2026-10-03
perfect-scrollbar		2026-10-03
react-router-dom		2026-10-03
react-router		2026-10-03
@babel/polyfill		2026-10-03
react-redux		2026-10-03
react-is		2026-10-03
@firebase/util		2026-10-03
immer		2026-10-03
isarray		2026-10-03
path-to-regexp		2026-10-03
process		2026-10-03
redux		2026-10-03
core-js		2026-10-03
fbjs		2026-10-03
inherits		2026-10-03
object-assign		2026-10-03
prop-types		2026-10-03
querystring-es3		2026-10-03
warning		2026-10-03
querystringify		2026-10-03
requires-port		2026-10-03
url-parse		2026-10-03
hoist-non-react-statics		2026-10-03
invariant		2026-10-03
redux-logger		2026-10-03
symbol-observable		2026-10-03
create-react-context		2026-10-03
gud		2026-10-03
react-fast-compare		2026-10-03
history		2026-10-03
memoize-one		2026-10-03
shallowequal		2026-10-03
acorn		2026-10-03
redux-thunk		2026-10-03
@firebase/component		2026-10-03
@firebase/logger		2026-10-03
@firebase/app		2026-10-03
is-buffer		2026-10-03
base64-js		2026-10-03
buffer		2026-10-03
ieee754		2026-10-03
@emotion/styled		2026-10-03
react-router-hash-link		2026-10-03
punycode		2026-10-03
@emotion/memoize		2026-10-03
@emotion/serialize		2026-10-03
qr.js		2026-10-03
emotion-theming		2026-10-03
babel-runtime		2026-10-03
deepmerge		2026-10-03
@emotion/is-prop-valid		2026-10-03
fast-deep-equal		2026-10-03
react-helmet		2026-10-03
react-side-effect		2026-10-03
url		2026-10-03
add-dom-event-listener		2026-10-03
component-classes		2026-10-03
component-indexof		2026-10-03
escape-string-regexp		2026-10-03
copy-to-clipboard		2026-10-03
toggle-selection		2026-10-03
@emotion/core		2026-10-03
@emotion/utils		2026-10-03
@emotion/weak-memoize		2026-10-03
lodash.get		2026-10-03
polished		2026-10-03
color-convert		2026-10-03
color-name		2026-10-03
react-hot-loader		2026-10-03
ansi-regex		2026-10-03
strip-ansi		2026-10-03
reduce-reducers		2026-10-03
magic-string		2026-10-03
json3		2026-10-03
ansi-styles		2026-10-03
chalk		2026-10-03
supports-color		2026-10-03
@firebase/webchannel-wrapper		2026-10-03
copy-text-to-clipboard		2026-10-03
redux-persist		2026-10-03
ulid		2026-10-03
react-feather		2026-10-03
detect-node		2026-10-03
array-sort		2026-10-03
default-compare		2026-10-03
get-value		2026-10-03
kind-of		2026-10-03
react-codemirror2		2026-10-03
react-dev-utils		2026-10-03
react-error-overlay		2026-10-03
@mdx-js/tag		2026-10-03
capitalize		2026-10-03
acorn-jsx		2026-10-03
acorn-dynamic-import		2026-10-03
callbag-observe		2026-10-03
callbag-subject		2026-10-03
component-props		2026-10-03
component-xor		2026-10-03
docz-theme-default		2026-10-03
docz		2026-10-03
dom-iterator		2026-10-03
lodash.flattendepth		2026-10-03
react-imported-component		2026-10-03
react-perfect-scrollbar		2026-10-03
react-powerplug		2026-10-03
react-qr-svg		2026-10-03
react-redux-firebase		2026-10-03
react-sizes		2026-10-03
redux-firestore		2026-10-03
regenerate		2026-10-03
regexpu-core		2026-10-03
regjsgen		2026-10-03
regjsparser		2026-10-03
responsively		2026-10-03
sourcemap-codec		2026-10-03
unescape		2026-10-03
unicode-canonical-property-names-ecmascript		2026-10-03
unicode-match-property-ecmascript		2026-10-03
unicode-match-property-value-ecmascript		2026-10-03
unicode-property-aliases-ecmascript		2026-10-03

Tracking, tag and verification IDs

No analytics property, tag manager container, pixel or site-verification token was found in the stored source.

Third-party hosts

Hosts outside heypolls.netlify.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
codesandbox.io	connect	view source
docz.site	connect	view source
f.fontdeck.com	connect	view source
fast.fonts.net	connect	view source
fonts.googleapis.com	connect	view source
heypolls.com	connect	view source
reactjs.org	connect	view source
unpkg.com	connect	view source
use.typekit.net	connect	view source
www.danijelgrabez.com	stylesheet connect	view source
www.w3.org	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 4) }. 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://heypolls.netlify.app/static/js/app.4e1c5075.js	js	26.4 KB	2026-10-03	2026-10-03
https://heypolls.netlify.app/static/js/vendors.a2c0d97b.js	js	2.4 MB	2026-10-03	2026-10-03
https://heypolls.netlify.app/	html	954 B	2026-10-03	2026-10-03
https://heypolls.netlify.app/static/js/runtime~app.a970673992876da70f4c.js	js	12.3 KB	2026-10-03	2026-10-03

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

1 page, 4 files, 2.4 MB; 135 libraries, 0 identifiers, 11 third-party hosts
135 libraries added
- @babel/polyfill
- @babel/runtime
- @emotion/core
- @emotion/is-prop-valid
- @emotion/memoize
- @emotion/serialize
- @emotion/styled
- @emotion/utils
- @emotion/weak-memoize
- @firebase/app
- @firebase/component
- @firebase/firestore
- and 123 more
12 third-party hosts added
4 files added

Questions about heypolls.netlify.app

How does PageSourceSearch know what heypolls.netlify.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 heypolls.netlify.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 heypolls.netlify.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 heypolls.netlify.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.