AOS vs core-js

core-js is the more common of the two in our index: it runs on 17,993 websites against 1,013 for AOS, and 480 sites use both. Counts come from real scans, not vendor claims.

AOS: 1,013
core-js: 17,993

AOS

JavaScript library to animate elements on your page as you scroll.

Indexed sites: 1,013
Share of JavaScript libraries: 3%

Well-known sites using it

All 1,013 sites

core-js

core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.

Indexed sites: 17,993
Share of JavaScript libraries: 45%

Well-known sites using it

microsoft.com3.6.4
mail.ru3.26.1
dzen.ru2.6.12
azure.com3.25.0
cloud.microsoft3.33.0
gandi.net3.45.1

All 17,993 sites

Used together

480 sites run both AOS and core-js. That is 47% of the sites using AOS, the smaller of the two.

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Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.