Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 192.30.252.154 |
| Server Software | GitHub.com |
| Compression | gzip |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 192.30.252.154
Server Software GitHub.com
Compression gzip
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 40.1 ms |
| TCP Connect | 117.5 ms |
| TLS Handshake | 84.2 ms |
| Time To First Byte (TTFB) | 290.9 ms |
| Content Download | 0.1 ms |
| Total Response Time | 291 ms |
DNS Lookup 40.1 ms
TCP Connect 117.5 ms
TLS Handshake 84.2 ms
Time To First Byte (TTFB) 290.9 ms
Content Download 0.1 ms
Total Response Time 291 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Prototype JavaScript framework: a foundation for ambitious web applications |
Title Prototype JavaScript framework: a foundation for ambitious web applications
HTTP Headers
| Server
| GitHub.com |
| Date
| Tue, 21 Jul 2026 15:26:35 GMT |
| Content-type
| text/html; charset=utf-8 |
| Last-modified
| Fri, 10 Nov 2023 21:29:45 GMT |
| Vary
| Accept-Encoding |
| Access-control-allow-origin
| * |
| Etag
| W/"654ea0c9-dce" |
| Expires
| Tue, 21 Jul 2026 15:36:35 GMT |
| Cache-control
| max-age=600 |
| Content-encoding
| gzip |
| X-proxy-cache
| MISS |
| X-github-request-id
| 2EEA:1887D2:96F5261:A0A9325:6A5F8FAB |
Server GitHub.com
Date Tue, 21 Jul 2026 15:26:35 GMT
Content-type text/html; charset=utf-8
Last-modified Fri, 10 Nov 2023 21:29:45 GMT
Vary Accept-Encoding
Access-control-allow-origin *
Etag W/"654ea0c9-dce"
Expires Tue, 21 Jul 2026 15:36:35 GMT
Cache-control max-age=600
Content-encoding gzip
X-proxy-cache MISS
X-github-request-id 2EEA:1887D2:96F5261:A0A9325:6A5F8FAB
