ts-invariant on new websites

1. ts-invariant appeared on about 35 new sites in the last 30 days.^[1]
2. Almost all new ts-invariant sites also use Apollo Client.

The line is the 7-day average share of new sites that use ts-invariant, since 2 October. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category[3]	Bar
1	–	jQuery	13.8%	34.3%
2	–	jQuery Migrate	7.6%	18.8%
3	–	React Router	6.5%	16.1%
4	▼1	Motion	5.6%	14.0%
5	▲1	TanStack Router	4.4%	10.9%
6	▼1	Swiper	3.2%	8.1%
7	▲1	ES Module Shims	2.9%	7.1%
8	–	js-cookie	2.5%	6.1%
9	▼1	Modernizr	2.3%	5.8%
10	▲1	GSAP	1.9%	4.7%
11	▲1	Lenis	1.4%	3.4%
12	▲3	Three.js	1.3%	3.2%
…
663	▲192	ts-invariant	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Javascript Library tool. Among October launches it ranked #1116 in Javascript Library, up from #1308 in September. All 1807 in Javascript Library

Tool	Sites with both	vs all new sites	Bar
Apollo Client	40	5560x

Tools that turn up far more often on ts-invariant sites than on new sites in general, and how many times as common each one is there.

2 of the 42 sites using ts-invariant are product launches we list individually. The other 40 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	Also detected
Fezola | The MCP connector for all your inboxes app.fezola.com · AI	Nov 7
AbroadBuddies abroadbuddies.com · United Kingdom	Nov 6

Watches, exports and the API give you all 42 sites using ts-invariant, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. 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.
3. Some products people expect to see here are filed under a related category: UI Library.