JavaScript libraries
Who left YUI, and who still runs it
6,096 websites in the top 1M run YUI, observed directly from the rendered page in the July 2026 crawl.
1,052
stopped running it that month
118
of those are 11–500 employees
1,576
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running YUI
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
jQuery 87%core-js 82%PHP 67%RequireJS 61%Moodle 61%VideoJS 57%Bootstrap 52%HSTS 47%Google Analytics 41%Google Font API 40%
Share of a 3,000-domain sample of YUI users that also run each.