Day.js vs jQuery Migrate

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

Top sites by authority

Day.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

Day.js · jQuery Migrate · share of sites in each country using one or the other

United States 14,792

849,474

Germany 4,547

314,354

India 5,710

299,510

Japan 9,068

282,542

Italy 3,096

282,524

France 3,955

271,447

United Kingdom 4,861

269,921

Spain 2,948

252,481

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 Day.js sites · All jQuery Migrate sites