Cart.js on new websites
JavaScript library for building custom Shopify AJAX cart interfaces.
- Sites using Cart.js
- 282
- since Jul 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 19
no change on the 30 days before - Last 7 days
- 0.0%
- of new sites, 7-day average
no change on the week before
| First seen | Jul 9, 2026 |
|---|---|
| Last seen | Oct 20, 2026 |
| Website | cartjs.org |
What we found
- Cart.js appeared on about 140 new sites in the last 30 days.[1]
- Almost all new Cart.js sites also use Shopify.
Share of new sites using Cart.js
The line is the 7-day average share of new sites that use Cart.js, since 10 September.
Who uses Cart.js
| Type | Sites | Share | Bar |
|---|---|---|---|
| E-commerce | 73 | 70.2% | |
| Games | 11 | 10.6% | |
| Health | 8 | 7.7% | |
| Finance | 4 | 3.9% | |
| Productivity | 2 | 1.9% | |
| Content | 1 | 1.0% | |
| Developer Tools | 1 | 1.0% | |
| Education | 1 | 1.0% | |
| Hiring & HR | 1 | 1.0% | |
| Marketing | 1 | 1.0% | |
| Social | 1 | 1.0% |
| Country | Sites | Share | Bar |
|---|---|---|---|
 UK |
9 | 33.3% | |
 Indonesia |
7 | 25.9% | |
 US |
4 | 14.8% | |
 Australia |
1 | 3.7% | |
 Canada |
1 | 3.7% | |
 Germany |
1 | 3.7% | |
 Denmark |
1 | 3.7% | |
 Japan |
1 | 3.7% | |
 Netherlands |
1 | 3.7% | |
 Sweden |
1 | 3.7% |
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .store | 128 | 45.6% | |
| .com | 91 | 32.4% | |
| .site | 25 | 8.9% | |
| .uk | 10 | 3.6% | |
| .online | 9 | 3.2% | |
| .net | 3 | 1.1% | |
| .au | 2 | 0.7% | |
| .co | 2 | 0.7% | |
| .nl | 2 | 0.7% | |
| .org | 2 | 0.7% | |
| .ca | 1 | 0.4% |
Javascript Library on new sites
| # | Movement | Tool | Share of category[3] | Bar | |
|---|---|---|---|---|---|
| 1 | – |
jQuery
|
34.5% | ||
| 2 | – |
React Router
|
16.2% | ||
| 3 | – |
Motion
|
14.6% | ||
| 4 | – |
TanStack Router
|
10.8% | ||
| 5 | – |
Swiper
|
8.3% | ||
| … | |||||
| 253 | ▲14 |
Cart.js
|
<0.1% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Javascript Library tool. Cart.js is typically used alongside jQuery rather than instead of it. Among September launches it ranked #279 in Javascript Library, up from #293 in August. All 1553 in Javascript Library
Often used with Cart.js
| Tool | Sites with both | vs all new sites |
|---|---|---|
Google Hosted Libraries
|
140 | 52x |
Google Maps
|
223 | 19x |
Shopify
|
279 | 17x |
Facebook Pixel
|
83 | 8.7x |
|
jQuery
|
278 | 7.0x |
Tools that turn up far more often on Cart.js sites than on new sites in general, and how many times as common each one is there.
Recently launched products built on Cart.js
3 of the 282 sites using Cart.js are product launches we list individually. The other 279 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
| Site | Found |
|---|---|
| Rent Ledger Pro rentledgerpro.store · Finance | Aug 26 |
| TidySheets CRM tidysheetscrm.com · Finance | Aug 19 |
| SAKTI788 sakti788.site | Jul 26 |
Watches, exports and the API give you all 282 sites using Cart.js, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
- Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
- Some products people expect to see here are filed under a related category: UI Library.
How this page is made
FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards Cart.js when we detect Cart.js on it at that look.
Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites