Editors
Who left CodeMirror, and who still runs it
639 websites in the top 1M run CodeMirror, observed directly from the rendered page in the July 2026 crawl.
151
stopped running it that month
25
of those are 11–500 employees
587
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running CodeMirror
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
jQuery 94%Cloudflare 76%jQuery UI 73%Open Graph 68%Moment.js 66%HSTS 64%Google Analytics 62%core-js 55%jQuery Migrate 51%HTTP/3 48%
Share of a 639-domain sample of CodeMirror users that also run each.