What powers jsta-v4.com?
Last seen Jun 2026 · 8 technologies across 8 categories
Analytics
Google Analytics
since May 2025
Font scripts
Google Font API
since May 2025
JavaScript frameworks
Stimulus
since May 2025
PaaS
Amazon Web Services
since May 2025
Performance
Turbo
since May 2025
Programming languages
Ruby
since May 2025
UI frameworks
Tailwind CSS
since May 2025
Web frameworks
Ruby on Rails
since May 2025
Audience
- 65% desktop
- 35% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.67 / 10 · ranked #20,187,155 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 0.7 MB · 23 requests
Homepage as crawled by the HTTP Archive, Jul 2026.