jQuery Migrate vs Polyfill

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

Top sites by authority

jQuery Migrate · Polyfill · 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

jQuery Migrate · Polyfill · share of sites in each country using one or the other

United States 988,550

27,575

Germany 361,975

9,145

India 354,719

11,069

Japan 329,383

8,150

France 322,388

9,287

United Kingdom 313,223

11,713

Italy 315,256

7,289

Brazil 282,509

9,305

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, Jun 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 jQuery Migrate sites · All Polyfill sites