JS libraries impact on React sites | The State of Web Vitals 2026

LCP INP CLS

REReact Scoped to 9,570 sites out of 210,902 analyzed (frameworks) Compare with all sites →

At a glance the headline numbers for JS libraries impact

Performance impact by framework provider.

Providers ranked

After min-sites filter

14,650

Sites in sample

Combined across all items

0.00

Best CLS (p75)

Lodash

The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv

The ranking sorted by CLS at p75, fastest first

#	Provider	CLS p75	Passing	Sites
1	Lodash	0.00	94.4%	7,076
2	Flickity	0.01	88.6%	129
3	GSAP	0.02	91.1%	125
4	Swiper	0.02	88.7%	1,237
5	Backbone.js	0.03	80.4%	100
6	Moment.js	0.03	87.2%	1,028
7	Lit	0.03	87.2%	309
8	Lazysizes	0.04	87.2%	510
9	jQuery	0.04	85.9%	2,648
10	Vue.js	0.06	80.6%	247
11	Owl Carousel	0.08	81.9%	142
12	Slick Carousel	0.09	78.9%	343
13	React	0.18	69.1%	494
14	Next.js	0.31	58.7%	262

The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75

Lodash 73.9% 7,076 94% 0.00

GSAP 1.3% 125 91% 0.02

Swiper 12.9% 1,237 89% 0.02

Flickity 1.3% 129 89% 0.01

Moment.js 10.7% 1,028 87% 0.03

lazysizes 5.3% 510 87% 0.04

Lit 3.2% 309 87% 0.03

jQuery 27.7% 2,648 86% 0.04

Angular 0.1% 9 83% 0.01

Owl Carousel 1.5% 142 82% 0.08

Vue.js 2.6% 247 81% 0.06

Backbone.js 1% 100 80% 0.03

Slick Carousel 3.6% 343 79% 0.09

Stimulus/Hotwire 0.1% 8 71% 0.12

React 5.2% 494 69% 0.18

Next.js 2.7% 262 59% 0.31

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

94% of Lodash sites pass CLS. Next.js trails 35 points behind, leaving 41% of its sites failing. computed

The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv

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

LCP

INP

CLS

FCP

TTFB

Lodash 73.9%

891.8s

94105ms

940.00

881.3s

77739ms

jQuery 27.7%

642.9s

93131ms

860.04

542.4s

321.9s

Swiper 12.9%

662.8s

92130ms

890.02

572.4s

362.0s

Moment.js 10.7%

593.2s

93129ms

870.03

462.7s

232.2s

lazysizes 5.3%

732.5s

84176ms

870.04

741.8s

591.3s

React 5.2%

792.4s

72220ms

690.18

751.8s

471.2s

Slick Carousel 3.6%

632.8s

78184ms

790.09

592.2s

431.6s

Lit 3.2%

752.5s

92135ms

870.03

751.8s

581.2s

Next.js 2.7%

832.3s

51525ms

590.31

821.5s

421.1s

Vue.js 2.6%

633.0s

90154ms

810.06

552.4s

272.1s

Owl Carousel 1.5%

633.4s

95134ms

820.08

482.5s

352.0s

Flickity 1.3%

583.1s

90125ms

890.01

562.8s

322.2s

GSAP 1.3%

603.0s

96147ms

910.02

572.4s

281.8s

Backbone.js 1%

663.1s

94140ms

800.03

532.4s

352.0s

Angular 0.1%

672.6s

100144ms

830.01

502.0s

501.7s

Stimulus/Hotwire 0.1%

862.2s

86164ms

710.12

861.5s

571.2s

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.

Lodash leads on CLS: 94% of its sites pass. Next.js trails at 59%. computed

The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv

Related signals A/B testing (12) → Personalization (6) → E-commerce (17) → CDN (16) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured

JS libraries impact React sites

At a glance the headline numbers for JS libraries impact

The ranking sorted by CLS at p75, fastest first

Passing CLS per provider which group passes the CLS most often

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