JavaScript libraries market share on brand websites

Libraries loaded on the homepage.

#	Technology	UK brands	United Kingdom	Global
1	jQuery	29%	41%	35%
2	Swiper	14%	11%	12%
3	core-js	13%	17%	11%
4	jQuery Migrate	11%	16%	9.7%
5	Slick	5.9%	6.7%	5.1%
6	webpack	4.7%	3.4%	2.3%
7	Modernizr	3.7%	4.8%	2.7%
8	lazysizes	2.8%	2.2%	1.8%
9	jQuery UI	2.4%	4.7%	3.1%
10	GSAP	2.2%	1.3%	1.8%
11	Owl Carousel	2.1%	4.5%	3.1%
12	Alpine.js	2%	3.1%	1.5%
13	Lottie	1.3%	0.7%	1%
14	Vite	1%	0.7%	2.1%
15	RequireJS	0.9%	2%	0.5%
16	Lodash	0.9%	0.4%	0.4%
17	Polyfill.io (compromised CDN)	0.2%	<0.1%	<0.1%
18	Hotwire (Turbo / Stimulus)	0.2%	0.4%	0.6%
19	htmx	0.2%	0.3%	0.2%
20	three.js	<0.1%	<0.1%	<0.1%

By site popularity

Share of measured sites in each Tranco popularity band that use the technology: the top 1,000, 10,000 and 100,000 sites and the whole top million.

#	Technology	Top 1K	Top 10K	Top 100K	Top 1M
1	webpack	14%	8.1%	7.1%	6.2%
2	jQuery	0%	6.6%	17%	20%
3	Swiper	2.9%	6.6%	12%	13%
4	core-js	2.9%	2.9%	4.2%	5.8%
5	Lottie	0%	2.2%	1.2%	1%
6	jQuery Migrate	0%	1.5%	3%	4.4%
7	Modernizr	0%	1.5%	2.2%	2.4%
8	lazysizes	0%	1.5%	1.6%	1.8%
9	Alpine.js	0%	1.5%	0.6%	1.3%
10	Slick	0%	0.7%	2%	3.5%
11	RequireJS	0%	0.7%	0.6%	1.2%
12	Vite	0%	0.7%	1%	0.7%
13	jQuery UI	0%	0%	1.4%	1.8%
14	Owl Carousel	0%	0%	0.8%	1.2%
15	Lodash	0%	0%	0.8%	0.9%
16	GSAP	0%	0%	1.2%	0.9%
	Sites measured	35	136	496	678

Our crawler: 1,277 sites · UK brands · updated 13 Nov 2026 · Methodology