PageSourceSearch / Technologies / JavaScript libraries / SystemJS JavaScript libraries
Websites using SystemJS
SystemJS is a module loader with import map support for older browsers.
About 125,714 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is SystemJS detected?
The page declares its modules in a script of type systemjs-importmap. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
systemjs-importmap 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 SystemJS
Top 50 websites using SystemJS
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 17:25:22 UTC.
# Website Rank Found in
1
w3schools.com 486
js https://campus.w3schools.com/cdn/sho…/c1/app.A60-IfPs.js
view source profile
2
zerohedge.com 767
js https://store.zerohedge.com/cdn/shop…/c1/app.D1P6yWfp.js
view source profile
3
izotope.com 1,063
js https://www.izotope.com/cdn/shopifyc…/c1/app.D1P6yWfp.js
view source profile
4
ncaapublications.com 1,239
js https://ncaapublications.com/cdn/sho…/c1/app.D1P6yWfp.js
view source profile
5
getresponse.com 1,996
html https://app.getresponse.com/login?lang=en
view source profile
6
wechat.com 2,132
js https://sgnewres.wechat.com/t/wx_fed…/CoWwRVd0-legacy.js
view source profile
7
lonelyplanet.com 2,251
js https://shop.lonelyplanet.com/cdn/sh…/c1/app.A60-IfPs.js
view source profile
8
vistaprint.com 2,698
html https://www.vistaprint.com/
view source profile
9
khronos.org 2,708
js https://store.khronos.org/cdn/shopif…/c1/app.D1P6yWfp.js
view source profile
10
nu.nl 3,273
js https://shop.nu.nl/cdn/shopifycloud/…/c1/app.A60-IfPs.js
view source profile
11
chicagotribune.com 3,345
js https://store.chicagotribune.com/cdn…/c1/app.A60-IfPs.js
view source profile
12
vogue.co.uk 3,761
js https://shop.vogue.co.uk/cdn/shopify…/c1/app.D1P6yWfp.js
view source profile
13
vodafone.co.uk 3,885
js https://cdn.vodafone.co.uk/web-marke…52011aa3483c91c5a4d4.js
view source profile
14
ine.es 4,154
html https://www.ine.es/portalgis/apps/ex…d0f487b95daab4826b4541e
view source profile
15
bkconnection.com 4,183
js https://bkconnection.com/cdn/shopify…/c1/app.D1P6yWfp.js
view source profile
16
ala.org 4,604
html https://connect.ala.org/home
view source profile
17
medicare.gov 4,637
js https://www.medicare.gov/account/ass…ills-legacy-y5SJNft7.js
view source profile
18
mindbodygreen.com 5,669
js https://shop.mindbodygreen.com/cdn/s…/c1/app.A60-IfPs.js
view source profile
19
quip.com 5,922
html https://quip.com/account/login
view source profile
20
foldscope.com 6,073
js https://foldscope.com/cdn/shopifyclo…/c1/app.D1P6yWfp.js
view source profile
21
cookiefirst.com 6,112
js https://consent.cookiefirst.com/additional-polyfills.js
view source profile
22
wwf.org.uk 6,450
js https://shop.wwf.org.uk/cdn/shopifyc…/c1/app.A60-IfPs.js
view source profile
23
particle.io 6,508
js https://store.particle.io/cdn/shopif…/c1/app.A60-IfPs.js
view source profile
24
ecochallenge.org 7,202
js https://store.ecochallenge.org/cdn/s…/c1/app.A60-IfPs.js
view source profile
25
bitcoinmagazine.com 7,427
js https://store.bitcoinmagazine.com/cd…/c1/app.A60-IfPs.js
view source profile
26
vive.com 7,495
js https://shop-us.vive.com/cdn/shopify…/c1/app.A60-IfPs.js
view source profile
27
versobooks.com 7,855
js https://www.versobooks.com/cdn/shopi…/c1/app.D1P6yWfp.js
view source profile
28
whoi.edu 7,957
js https://shop.whoi.edu/cdn/shopifyclo…/c1/app.A60-IfPs.js
view source profile
29
jam.dev 8,251
js https://jam.dev/assets/polyfills-legacy-7edfb423.js
view source profile
30
netgate.com 8,317
js https://shop.netgate.com/cdn/shopify…/c1/app.A60-IfPs.js
view source profile
31
macmillan.org.uk 8,414
js https://orders.macmillan.org.uk/cdn/…/c1/app.A60-IfPs.js
view source profile
32
blockstream.com 8,535
js https://store.blockstream.com/cdn/sh…/c1/app.A60-IfPs.js
view source profile
33
plaud.ai 8,736
js https://www.plaud.ai/cdn/shopifyclou…/c1/app.D1P6yWfp.js
view source profile
34
ecoflow.com 8,874
js https://us.ecoflow.com/cdn/shopifycl…/c1/app.D1P6yWfp.js
view source profile
35
indigo.ca 9,253
js https://www.indigo.ca/cdn/shopifyclo…/c1/app.D1P6yWfp.js
view source profile
36
harpers.org 9,271
js https://store.harpers.org/cdn/shopif…/c1/app.A60-IfPs.js
view source profile
37
almanac.com 9,276
js https://store.almanac.com/cdn/shopif…/c1/app.D1P6yWfp.js
view source profile
38
joinpeertube.org 9,450
js https://joinpeertube.org/assets/polyfills-legacy-WJVm9d9X.js
view source profile
39
startrek.com 9,494
js https://shop.startrek.com/cdn/shopif…/c1/app.A60-IfPs.js
view source profile
40
omr.com 9,498
js https://education.omr.com/cdn/shopif…/c1/app.A60-IfPs.js
view source profile
41
gymshark.com 9,579
js https://us.checkout.gymshark.com/cdn…/c1/app.D1P6yWfp.js
view source profile
42
lareviewofbooks.org 9,739
js https://shop.lareviewofbooks.org/cdn…/c1/app.A60-IfPs.js
view source profile
43
bodybuilding.com 9,752
js https://shop.bodybuilding.com/cdn/sh…/c1/app.D1P6yWfp.js
view source profile
44
intelligentchange.com 9,823
js https://www.intelligentchange.com/cd…/c1/app.D1P6yWfp.js
view source profile
45
ritual.com 9,961
js https://ritual.com/cdn/shopifycloud/…/c1/app.D1P6yWfp.js
view source profile
46
mindful.org 10,310
js https://shop.mindful.org/cdn/shopify…/c1/app.A60-IfPs.js
view source profile
47
unesp.br 10,440
html https://geo.unesp.br/portal/apps/exp…9514a189574caa1017117dc
view source profile
48
ashmolean.org 10,475
js https://shop.ashmolean.org/cdn/shopi…/c1/app.D1P6yWfp.js
view source profile
49
switch-science.com 10,510
js https://www.switch-science.com/cdn/s…/c1/app.D1P6yWfp.js
view source profile
50
notta.ai 10,927
js https://shop.notta.ai/cdn/shopifyclo…/c1/app.A60-IfPs.js
view source profile
How it appears in the source
From w3schools.com (js):
ity")}))}catch{}try{const n=document.querySelector('script[type="importmap"], script[type="systemjs-importmap"]');if(n?.textContent){const r=JSON.parse(n.textContent);if(r.integrity!=null&&typeof r.in
See every site: search for systemjs-importmap
Questions about finding SystemJS
How does PageSourceSearch know a website uses SystemJS?
By the source itself: The page declares its modules in a script of type systemjs-importmap. 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 SystemJS?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 125,714 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 SystemJS 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 systemjs-importmap with wp-content/plugins/ lists the WordPress sites that use SystemJS.