JS libraries impact: 21 providers ranked | The State of Web Vitals 2026

1

At a glance the headline numbers for JS libraries impact

Performance impact by framework provider.

21

Providers ranked

After min-sites filter

272,218

Sites in sample

Combined across all items

0.01

Best CLS (p75)

Flickity

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv

2

The ranking sorted by CLS at p75, fastest first

#	Provider	CLS p75	Passing	Sites
1	Flickity	0.01	91.1%	5,509
2	Turbo/Hotwire	0.01	94.7%	520
3	Polyfill.io	0.01	87.3%	88
4	GSAP	0.02	89.4%	4,918
5	Stimulus/Hotwire	0.02	92.1%	3,021
6	jQuery	0.02	89.9%	129,336
7	Swiper	0.02	89.2%	29,806
8	Lazysizes	0.03	88.2%	12,984
9	Lodash	0.03	87.1%	25,401
10	Slick Carousel	0.03	86.6%	14,369
11	Backbone.js	0.04	83.8%	1,540
12	Vue.js	0.04	84.4%	10,724
13	Moment.js	0.04	84.9%	7,670
14	Lit	0.04	84.3%	10,260
15	Owl Carousel	0.05	83.7%	8,206
16	Next.js	0.10	75.1%	3,970
17	Ember.js	0.12	74.4%	114
18	Nuxt	0.12	72.3%	1,199
19	React	0.16	69.6%	448
20	Ionic	0.25	56.1%	227
21	Angular	0.32	52.2%	1,908

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv

3

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75

Turbo/Hotwire 0.3% 520 95% 0.01

Stimulus/Hotwire 1.6% 3,021 92% 0.02

Flickity 2.9% 5,509 91% 0.01

jQuery 68.1% 129,336 90% 0.02

Marko 0% 20 90% 0.10

GSAP 2.6% 4,918 89% 0.02

Swiper 15.7% 29,806 89% 0.02

lazysizes 6.8% 12,984 88% 0.03

Polyfill.io 0% 88 87% 0.01

Lodash 13.4% 25,401 87% 0.03

Slick Carousel 7.6% 14,369 87% 0.03

Moment.js 4% 7,670 85% 0.04

Vue.js 5.6% 10,724 84% 0.04

Lit 5.4% 10,260 84% 0.04

Backbone.js 0.8% 1,540 84% 0.04

Owl Carousel 4.3% 8,206 84% 0.05

Next.js 2.1% 3,970 75% 0.10

Ember.js 0.1% 114 74% 0.12

Nuxt.js 0.6% 1,199 72% 0.12

Polymer 0% 17 70% 0.15

React 0.2% 448 70% 0.16

Ionic 0.1% 227 56% 0.25

Angular 1% 1,908 52% 0.32

Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site

95% of Turbo/Hotwire sites pass CLS. Angular trails 43 points behind, leaving 48% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv

4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP

INP

CLS

FCP

TTFB

jQuery 68.1%

802.3s

95121ms

900.02

721.9s

521.3s

Swiper 15.7%

742.6s

94129ms

890.02

662.1s

471.5s

Lodash 13.4%

782.4s

93126ms

870.03

721.9s

601.3s

Slick Carousel 7.6%

812.3s

94128ms

870.03

741.8s

531.2s

lazysizes 6.8%

792.4s

93131ms

880.03

721.9s

521.3s

Vue.js 5.6%

762.5s

92144ms

840.04

692.0s

531.3s

Lit 5.4%

742.5s

90141ms

840.04

692.0s

561.3s

Owl Carousel 4.3%

792.3s

96120ms

840.05

731.9s

501.3s

Moment.js 4%

752.5s

91136ms

850.04

692.0s

521.4s

Flickity 2.9%

802.3s

96128ms

910.01

731.9s

571.3s

GSAP 2.6%

722.6s

97122ms

890.02

652.1s

451.6s

Next.js 2.1%

802.3s

71216ms

750.10

791.7s

70878ms

Stimulus/Hotwire 1.6%

882.0s

96121ms

920.02

841.6s

77770ms

Angular 1%

593.1s

75201ms

520.32

642.1s

79711ms

Backbone.js 0.8%

672.8s

92134ms

840.04

582.3s

401.6s

Nuxt.js 0.6%

702.7s

85172ms

720.12

691.9s

611.0s

Turbo/Hotwire 0.3%

921.7s

90161ms

950.01

861.4s

72831ms

React 0.2%

782.4s

72231ms

700.16

731.8s

461.2s

Ionic 0.1%

433.9s

82182ms

560.25

372.7s

69966ms

Ember.js 0.1%

742.5s

78161ms

740.12

722.0s

671.0s

Polyfill.io 0%

832.2s

93131ms

870.01

731.9s

631.1s

Marko 0%

583.1s

84175ms

900.10

422.9s

112.3s

Polymer 0%

1002.0s

67470ms

700.15

901.3s

80759ms

60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

Turbo/Hotwire leads on CLS: 95% of its sites pass. Angular trails at 52%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv