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

0.04

Best CLS (p75)

Lodash

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

The ranking sorted by CLS at p75, fastest first

#	Provider	CLS p75	Passing	Sites
1	Lodash	0.04	86.9%	7,076
2	GSAP	0.08	78.0%	125
3	Swiper	0.10	76.2%	1,237
4	Lit	0.11	74.4%	309
5	Moment.js	0.11	73.9%	1,028
6	Backbone.js	0.12	71.4%	100
7	jQuery	0.12	71.7%	2,648
8	Flickity	0.13	72.7%	129
9	Lazysizes	0.13	70.9%	510
10	Vue.js	0.15	63.6%	247
11	Owl Carousel	0.16	67.9%	142
12	Next.js	0.18	58.0%	262
13	Slick Carousel	0.18	58.3%	343
14	React	0.19	60.1%	494

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

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75

Lodash 73.9% 7,076 87% 0.04

GSAP 1.3% 125 78% 0.08

Swiper 12.9% 1,237 76% 0.10

Lit 3.2% 309 74% 0.11

Moment.js 10.7% 1,028 74% 0.11

Flickity 1.3% 129 73% 0.13

jQuery 27.7% 2,648 72% 0.12

Backbone.js 1% 100 71% 0.12

lazysizes 5.3% 510 71% 0.13

Owl Carousel 1.5% 142 68% 0.16

Vue.js 2.6% 247 64% 0.15

React 5.2% 494 60% 0.19

Stimulus/Hotwire 0.1% 8 60% 0.28

Slick Carousel 3.6% 343 58% 0.18

Next.js 2.7% 262 58% 0.18

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

87% of Lodash sites pass CLS. Next.js trails 29 points behind, leaving 42% of its sites failing. computed

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

812.2s

9960ms

870.04

801.5s

571.5s

jQuery 27.7%

682.8s

9969ms

720.12

632.2s

361.9s

Swiper 12.9%

662.9s

9972ms

760.10

602.4s

332.1s

Moment.js 10.7%

593.1s

10068ms

740.11

542.5s

272.2s

lazysizes 5.3%

702.6s

9978ms

710.13

702.0s

461.7s

React 5.2%

782.2s

9593ms

600.19

791.7s

641.1s

Slick Carousel 3.6%

672.8s

9878ms

580.18

652.3s

461.8s

Lit 3.2%

692.8s

10079ms

740.11

652.1s

441.9s

Next.js 2.7%

782.2s

90132ms

580.18

811.5s

73836ms

Vue.js 2.6%

682.8s

9978ms

640.15

632.2s

282.0s

Owl Carousel 1.5%

553.4s

10066ms

680.16

512.9s

312.6s

Flickity 1.3%

643.1s

9567ms

730.13

522.7s

332.5s

GSAP 1.3%

702.7s

10078ms

780.08

702.0s

261.7s

Backbone.js 1%

633.5s

10073ms

710.12

543.0s

412.2s

Angular 0.1%

Stimulus/Hotwire 0.1%

802.2s

10095ms

600.28

801.4s

60919ms

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: 87% of its sites pass. Next.js trails at 58%. computed

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