JavaScript libraries
Who left Day.js, and who still runs it
3,678 websites in the top 1M run Day.js, observed directly from the rendered page in the July 2026 crawl.
525
stopped running it that month
36
of those are 11–500 employees
2,367
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Day.js
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Open Graph 85%jQuery 84%core-js 81%Google Analytics 80%HSTS 75%Cloudflare 71%Facebook Pixel 62%Priority Hints 60%Cart Functionality 58%Google Font API 56%
Share of a 3,000-domain sample of Day.js users that also run each.