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

0.01

Best CLS (p75)

Lodash

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

The ranking sorted by CLS at p75, fastest first

#	Provider	CLS p75	Passing	Sites
1	Lodash	0.01	94.7%	7,076
2	Swiper	0.03	88.4%	1,237
3	Backbone.js	0.04	83.0%	100
4	Flickity	0.04	85.5%	129
5	GSAP	0.05	85.4%	125
6	Lit	0.05	85.9%	309
7	Lazysizes	0.05	86.6%	510
8	Moment.js	0.06	83.8%	1,028
9	jQuery	0.06	83.5%	2,648
10	Owl Carousel	0.08	77.7%	142
11	Vue.js	0.08	81.4%	247
12	Slick Carousel	0.10	75.4%	343
13	React	0.16	70.2%	494
14	Next.js	0.23	64.4%	262

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

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75

Lodash 73.9% 7,076 95% 0.01

Swiper 12.9% 1,237 88% 0.03

lazysizes 5.3% 510 87% 0.05

Lit 3.2% 309 86% 0.05

Flickity 1.3% 129 86% 0.04

GSAP 1.3% 125 85% 0.05

Moment.js 10.7% 1,028 84% 0.06

jQuery 27.7% 2,648 84% 0.06

Backbone.js 1% 100 83% 0.04

Vue.js 2.6% 247 81% 0.08

Owl Carousel 1.5% 142 78% 0.08

Slick Carousel 3.6% 343 75% 0.10

React 5.2% 494 70% 0.16

Angular 0.1% 9 67% 0.13

Next.js 2.7% 262 64% 0.23

Stimulus/Hotwire 0.1% 8 50% 0.19

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 Lodash sites pass CLS. Next.js trails 31 points behind, leaving 36% of its sites failing. computed

The State of Web Vitals · October 2026 · React sites (9,570) · all devices 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%

901.8s

9694ms

950.01

871.3s

75811ms

jQuery 27.7%

623.0s

97111ms

840.06

522.5s

302.0s

Swiper 12.9%

642.9s

96112ms

880.03

552.4s

342.0s

Moment.js 10.7%

563.3s

98111ms

840.06

442.8s

242.3s

lazysizes 5.3%

732.6s

89153ms

870.05

722.0s

561.4s

React 5.2%

802.4s

75196ms

700.16

761.8s

481.2s

Slick Carousel 3.6%

612.9s

87136ms

750.10

562.3s

381.9s

Lit 3.2%

782.3s

97118ms

860.05

751.8s

591.3s

Next.js 2.7%

862.2s

56398ms

640.23

841.5s

481.1s

Vue.js 2.6%

613.1s

96129ms

810.08

522.5s

262.0s

Owl Carousel 1.5%

563.4s

98110ms

780.08

482.9s

272.3s

Flickity 1.3%

563.3s

97111ms

860.04

512.6s

282.2s

GSAP 1.3%

553.4s

96120ms

850.05

502.7s

222.1s

Backbone.js 1%

663.4s

97112ms

830.04

472.7s

272.0s

Angular 0.1%

563.1s

100158ms

670.13

442.3s

441.8s

Stimulus/Hotwire 0.1%

752.5s

88134ms

500.19

751.6s

501.5s

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: 95% of its sites pass. Next.js trails at 64%. computed

The State of Web Vitals · October 2026 · React sites (9,570) · all devices 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