How does PageSourceSearch know what douglas.hk 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 douglas.hk 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 douglas.hk?

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 douglas.hk?

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

douglas.hk

Built with webpack, p5 2.3.3, raven-js 3.27.2, @vitest/utils 5.0.2, @pdftron/pdfjs-express-viewer 8.7.5, @collectionspace/cspace-public-browser 4.0.0, @okta/okta-signin-widget 7.49.1, @wangeditor/editor 5.1.23, @flussonic/flussonic-webrtc-player 24.7.1-10-g016867a, gtag, facebook-pixel, facebook-sdk and more. 5 pages and 11 stored files, last crawled 2026-10-03.

rank 1,569,148 15 libraries 6 identifiers 10 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
webpack		2026-10-03
p5	2.3.3	2026-10-03
raven-js	3.27.2	2026-10-03
@vitest/utils	5.0.2	2026-10-03
@pdftron/pdfjs-express-viewer	8.7.5	2026-10-03
@collectionspace/cspace-public-browser	4.0.0	2026-10-03
@okta/okta-signin-widget	7.49.1	2026-10-03
@wangeditor/editor	5.1.23	2026-10-03
@flussonic/flussonic-webrtc-player	24.7.1-10-g016867a	2026-10-03
gtag		2026-09-25
facebook-pixel		2026-09-25
facebook-sdk		2026-09-25
youtube-iframe-api		2026-09-25
webex	3.12.0	2026-09-25
@chakra-ui/utils	2.2.2	2026-09-25

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
Facebook domain verification (Meta)	2h8amdxtchqlxg4xvnsw8wbi0p2h9k	view source
Google site verification (Google)	_1dfpEA43m8alJqxWXU6Z0fDOww5YK0W7dCb_NFTWWU	view source
Google site verification (Google)	j7VMO_9XmtnoWvRie2-W6OJY9dGIFVwgImIV9bY0JWE	view source
Google site verification (Google)	zUutuMrrTQFe8cQ40yzM3a-kaNLFCCsCAT6LpRD8WH8	view source
Sentry DSN host (Sentry)	sentry.io	view source
Sentry DSN host (Sentry)	sentry.wixpress.com	view source

Third-party hosts

Hosts outside douglas.hk 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
axios-http.com	connect	view source
bo.wix.com	connect	view source
browser.sentry-cdn.com	script	view source
frog.wix.com	connect	view source
github.com	connect	view source
pages.parastorage.com	connect	view source
panorama.wixapps.net	connect	view source
sled.wix.dev	connect	view source
static.parastorage.com	script connect	view source
unused.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 11) }. 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://www.douglas.hk/_partials/wix-thunderbolt…ntWorker.f99f6b73.bundle.min.js	js	652.3 KB	2026-10-03	2026-10-03
https://www.douglas.hk/courses	html	903.2 KB	2026-10-03	2026-10-03
https://www.douglas.hk/contact	html	686.4 KB	2026-10-03	2026-10-03
https://www.douglas.hk/about	html	626.4 KB	2026-10-03	2026-10-03
https://www.douglas.hk/blog	html	1.3 MB	2026-10-03	2026-10-03
https://www.douglas.hk/	html	691.4 KB	2026-10-03	2026-10-03
https://connect.facebook.net/en_US/fbevents.js	js library	not fetched	2026-09-25	current
https://connect.facebook.net/signals/config/4289…155%2C168%2C45%2C121%2C13%2C187	js library	not fetched	2026-09-25	current
https://www.douglas.hk/_partials/wix-thunderbolt…ntWorker.74db2e02.bundle.min.js	js	652.4 KB	2026-09-25	current
https://www.googletagmanager.com/gtag/js?id=G-W1X9DQ62K0	js library	not fetched	2026-09-25	current
https://www.youtube.com/iframe_api	js library	not fetched	2026-09-25	current

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, 6 files, 4.8 MB; 9 libraries, 6 identifiers, 10 third-party hosts
9 libraries added
- @vitest/utils 5.0.2
- @flussonic/flussonic-webrtc-player 24.7.1-10-g016867a
- raven-js 3.27.2
- @okta/okta-signin-widget 7.49.1
- @collectionspace/cspace-public-browser 4.0.0
- @wangeditor/editor 5.1.23
- @pdftron/pdfjs-express-viewer 8.7.5
- p5 2.3.3
- webpack
6 identifiers added
- _1dfpEA43m8alJqxWXU6Z0fDOww5YK0W7dCb_NFTWWU Google site verification
- j7VMO_9XmtnoWvRie2-W6OJY9dGIFVwgImIV9bY0JWE Google site verification
- zUutuMrrTQFe8cQ40yzM3a-kaNLFCCsCAT6LpRD8WH8 Google site verification
- 2h8amdxtchqlxg4xvnsw8wbi0p2h9k Facebook domain verification
- sentry.wixpress.com Sentry DSN host
- sentry.io Sentry DSN host
11 third-party hosts added
6 files added

Questions about douglas.hk

How does PageSourceSearch know what douglas.hk 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 douglas.hk 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 douglas.hk?: 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 douglas.hk?: 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.