Websites using @castleio/castle-js (npm)
@castleio/castle-js is an npm package; the sites listed here load it from the jsDelivr CDN, where it is among the most requested packages. 3 websites in the PageSourceSearch index contain the code that reveals it; the 3 highest-ranked are listed below.
How is @castleio/castle-js (npm) detected?
A page loading @castleio/castle-js from jsDelivr references cdn.jsdelivr.net/npm/@castleio/castle-js followed by a version or a path. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
cdn\.jsdelivr\.net/npm/@castleio/castle\-js[@/] 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 @castleio/castle-js (npm)
Top 50 websites using @castleio/castle-js (npm)
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 08:06:41 UTC.
| # | Website | Rank | Found in | |
|---|---|---|---|---|
| 1 | educationwalkthrough.com | 159,448 | html https://dashboard.educationwalkthrough.com/login | view source profile |
| 2 | dailypay.com | 398,639 | html https://app.dailypay.com/login?utm_s…&utm_medium=crossdomain | view source profile |
| 3 | oneoption.com | 3,607,250 | html https://app.oneoption.com/account/login | view source profile |
How it appears in the source
From educationwalkthrough.com (html):
<script src="https://cdn.jsdelivr.net/npm/@castleio/[email protected]/dist/castle.browser.min.js"></script>
See every site: search for cdn\.jsdelivr\.net/npm/@castleio/castle\-js[@/]
Questions about finding @castleio/castle-js (npm)
- How does PageSourceSearch know a website uses @castleio/castle-js (npm)?
- By the source itself: A page loading @castleio/castle-js from jsDelivr references cdn.jsdelivr.net/npm/@castleio/castle-js followed by a version or a path. 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 @castleio/castle-js (npm)?
- 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 @castleio/castle-js (npm) 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 cdn\.jsdelivr\.net/npm/@castleio/castle\-js[@/] with wp-content/plugins/ lists the WordPress sites that use @castleio/castle-js (npm).