css-vars-ponyfill on new websites

1. css-vars-ponyfill appeared on about 32 new sites in the last 30 days.^[1]
2. Almost all new css-vars-ponyfill sites also use jQuery.

The line is the 7-day average share of new sites that use css-vars-ponyfill, since 30 October. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category[2]	Bar
1	–	jQuery	13.7%	34.1%
2	–	jQuery Migrate	7.5%	18.7%
3	–	React Router	6.4%	15.9%
4	▼1	Motion	5.6%	13.8%
5	▲1	TanStack Router	4.4%	11.0%
6	▼1	Swiper	3.2%	8.0%
7	▲1	ES Module Shims	2.9%	7.2%
8	–	js-cookie	2.5%	6.1%
9	▼1	Modernizr	2.3%	5.7%
10	▲1	GSAP	1.9%	4.7%
11	▲1	Lenis	1.4%	3.4%
12	▲3	Three.js	1.3%	3.2%
…
819		css-vars-ponyfill	<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. All 1832 in Javascript Library

Tool	Sites with both	vs all new sites	Bar
jQuery	32	7.3x

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

1 of the 32 sites using css-vars-ponyfill are product launches we list individually. The other 31 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
El Bueno Coffee Roasters elbuenocoffee.com · E-commerce · India	Nov 7

Watches, exports and the API give you all 32 sites using css-vars-ponyfill, from £15 a month.

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