is-plain-object on new websites

1. is-plain-object appeared on about 390 new sites in the last 30 days.^[1]
2. Almost all new is-plain-object sites also use React.

The line is the 7-day average share of new sites that use is-plain-object, since 25 September. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category[3]	Bar
1	–	jQuery	13.8%	34.3%
2	–	jQuery Migrate	7.6%	18.8%
3	–	React Router	6.5%	16.1%
4	▼1	Motion	5.7%	14.1%
5	▲1	TanStack Router	4.4%	11.0%
6	▼1	Swiper	3.3%	8.1%
7	▲1	ES Module Shims	2.9%	7.1%
8	–	js-cookie	2.5%	6.1%
9	▼1	Modernizr	2.3%	5.8%
10	▲1	GSAP	1.9%	4.7%
11	▲1	Lenis	1.4%	3.4%
12	▲3	Three.js	1.3%	3.2%
…
250		is-plain-object	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Javascript Library tool. is-plain-object is typically used alongside jQuery rather than instead of it. All 1713 in Javascript Library

Tool	Sites with both	vs all new sites	Bar
core-js	260	1114x
Twemoji	340	655x
jQuery UI	248	520x
SureCookie	212	263x
SureRank	185	146x

Tools that turn up far more often on is-plain-object sites than on new sites in general, and how many times as common each one is there.

4 of the 427 sites using is-plain-object are product launches we list individually. The other 423 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

• Smart Cars Hire smartcarshire.com
• Veritas Taxes and advisory inc veritastaxes.online
• Ion Recon ionrecon.net.in

Site	Found	Also detected
Smart Cars Hire smartcarshire.com	Nov 5
Veritas Taxes and advisory inc veritastaxes.online · Finance · Canada	Nov 5
Ion Recon ionrecon.net.in · India	Nov 5
Drivoom · dźwięk silnika dla Twojego elektryka drivoom.com · Poland	Nov 5

Watches, exports and the API give you all 427 sites using is-plain-object, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
3. Some products people expect to see here are filed under a related category: UI Library.