Ran some numbers - Core Web Vital pass rates:
- jQuery, no React - 4.17M sites - 62.2%
- React, no jQuery - 748k sites - 65.5%
The jQuery, no React - is mainly WordPress sites, taking that out of the equation:
- jQuery, no React, not WordPress - 1.75M sites - 72.5%
- jQuery, no React, WordPress - 2.42M sites - 54.8%
So outside WordPress, jQuery sites pass more often than React sites.
INP is where React is worse. INP is the responsiveness metric. 95% of jQuery sites have good INP, against 87% of React sites. Probably the cost of large JS bundles hydrating on load, whereas a small jQuery script costs relatively little.
And there’s a small group of sites that run both, and predictably perform the worst of the lot with 41.8% pass rate.
It’s not something we measure ( yet ) but does seem there’s a lot of simple brochure site that really just don’t need react, pre-rendering and a lot of the complexity that comes with it, but maybe that’s a developer convenience / preference.
Forgot to put a link to our site, you can read the report and more details here https://theweb.report/