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 849,474

23,184

Germany 314,354

7,634

India 299,510

9,206

Italy 282,524

6,125

Japan 282,542

6,044

United Kingdom 269,921

9,905

France 271,447

7,536

Spain 252,481

6,398

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, Sep 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