core-js vs jQuery Migrate

Head-to-head usage across the sites we track.

Top sites by authority

core-js · jQuery Migrate · how many of each technology's sites sit in the web's highest authority tiers

Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.

By country

core-js · jQuery Migrate · share of sites in each country using one or the other

United States 1,320,418

873,360

India 439,882

307,283

Germany 391,462

320,699

United Kingdom 404,005

271,907

Brazil 411,231

256,253

France 311,727

267,883

Italy 291,018

269,098

Japan 275,653

283,792

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.

Sites that switched

Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.

All core-js sites · All jQuery Migrate sites