Websites using focus-visible polyfill
The focus-visible polyfill adds the :focus-visible behavior to older browsers. 3 websites in the PageSourceSearch index contain the code that reveals it; the 3 highest-ranked are listed below.
How is focus-visible polyfill detected?
The page loads focus-visible.min.js. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
focus-visible(\.min)?\.js|/focus-visible@ regex Search the index for it
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About focus-visible polyfill
Top 50 websites using focus-visible polyfill
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-29 21:26:46 UTC.
| # | Website | Rank | Found in | |
|---|---|---|---|---|
| 1 | dropbox.com | 49 | html https://www.dropbox.com/ | view source profile |
| 2 | coolcarguy.com | 5,095,931 | html https://www.coolcarguy.com/ | view source profile |
| 3 | renotech.org | 6,750,326 | js https://renotech.org/assets/rt/js/main.js | view source profile |
How it appears in the source
From dropbox.com (html):
_static_js_account_menu_account_me-40f5db-vflHud6fd.js", "c_node_modules_focus-visible_dist_focus-visible.js": "c_node_modules_focus-visible_dist_focus-visible-vfla8XD-e.js", "c_node_modules_formatjs_
See every site: search for focus-visible(\.min)?\.js|/focus-visible@
Questions about finding focus-visible polyfill
- How does PageSourceSearch know a website uses focus-visible polyfill?
- By the source itself: The page loads focus-visible.min.js. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
- Is this a complete list of websites using focus-visible polyfill?
- No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of 3 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
- How do I find websites that use focus-visible polyfill together with another technology?
- Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example focus-visible(\.min)?\.js|/focus-visible@ with wp-content/plugins/ lists the WordPress sites that use focus-visible polyfill.