Clipboard.js vs core-js

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

Top sites by authority

Clipboard.js · core-js · 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

Clipboard.js · core-js · share of sites in each country using one or the other

United States 20,053

1,479,835

India 11,018

495,926

United Kingdom 8,019

457,421

Germany 10,070

439,161

Brazil 7,600

420,075

France 7,401

369,824

Canada 6,540

341,001

Japan 28,560

317,210

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 Clipboard.js sites · All core-js sites