What powers code4lib.jp?
Last seen Jun 2026 · 17 technologies across 12 categories
Caching
Varnish
since Nov 2022
CDN
Fastly
since Nov 2022
Hosting
Sakura Internet
since Nov 2022
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Nov 2022
Popper
since Mar 2024
PWA
since Mar 2024
RSS
since Sep 2024
Webpack
since Mar 2024
PaaS
GitHub Pages
since Nov 2022
Programming languages
Static site generator
Web servers
Nginx
since Mar 2024
Webmail
Google Workspace
since Nov 2022
Wikis
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.55 / 10 · ranked #394,116 of all domains
40 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 0.8 MB · 15 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| wiki.code4lib.jp | 10 |
| www.code4lib.jp | 9 |