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prototypejs.org

https://prototypejs.org· First analyzed 27 Apr 2026· Updated 27 Apr 2026
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prototypejs.org
Desktop screenshot of prototypejs.org
Mobile screenshot of prototypejs.org
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

192.30.252.154

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Dulles, United States

ASN

AS36459

Organization

GitHub, Inc.

Server

GitHub.com

CDN

Proxy Cache

Nameservers

ns2.dnsimple-edge.net.ns3.dnsimple.com.ns4.dnsimple-edge.org.ns1.dnsimple.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
442 ms10%
Speed Index
575 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
37 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
GitHub Pages
CDN
Proxy Cache

SEO Analysis

F39/100
11
7
3
Meta Tags4/15
Content7/12
Headings8/8
Technical5/21
E-E-A-T0/7
Images0/7
Links3/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
P
prototypejs.orgprototypejs.org

Prototype JavaScript framework: a foundation for ambitious web appl...

No description available for this page.

Title truncated.
Title Length75 chars

Recommended: 50-60 chars (~458px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Title is too long (75 chars, ~458px). Will be truncated in search results.
  • • Missing meta description — important for click-through rates in SERPs
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

10 issues found

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Local SEO

Local Search Readiness

0/100
Poor
15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F34/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
7/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:28%
Words:145
Token eff.:Too Short
Sections/1K:20.7

Structured Data

No Schema

Citation Readiness

Opening Summary24w
Descriptive Headingsavg 3.7w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
71/100
9
Passed
4
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
61/100
A+
5 mg
CO₂e / view
37.4 KB
Page Weight
95%
Cleaner Than
New Visitor
5 mg
vs
Returning (cached)
3 mg
Annual (10K/mo)
552 g
Emission Segments
Data Center
1 mg
Network
1 mg
Device
3 mg
Resource Breakdown
CSS
35.9 KB
HTML
1.5 KB
Green Hosting Not Verified
GitHub Pages
3 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

0%Critical

No SSL

No WAF

N/A

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HTTP Headers

Developer Console

access-control-allow-origin
*
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Mon, 27 Apr 2026 23:58:22 GMT
etag
W/"654ea0c9-dce"
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

prototypejs.org

Domain Age
20y 3m

Created

13.01.2006

Expires

13.01.2027

Last Updated

25.11.2025

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
F
37/100
Not Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Verdana

WCAG Partial
65/100
Readability
/30
26/30

16px · LH 1.50

Hierarchy
/20
12/20

0.81x ratio

WCAG
/25
13/25

4.28:1 min contrast

Performance
/25
14/25

System fonts

Heading Font

Verdana

Sans13px

Body Font

Verdana

Sans16px

Contrast Ratio

4.28:1

4 issues

Reading Comfort

~53 CPL

Optimal (45–75)
13px
h1
13px
h2
18px
h3
14px
h4
16px
p
Minor Second
Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~53 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 4.3:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

Buy on MyFontsFlesch 38

Color Palette

6 unique colors
Light
#ffffff
Background· 66.70000000000002%
#cbddf5
Primary· 4.9%
#8b91ad
Secondary· 3.1%
#d3e8ce
Primary· 2.6%

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Scripts & Styles

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

prototypejs.org

20 years old
Location detected: 🇺🇸 United Statesvia ip
Key-Systems GmbH

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Last analyzed: 27 Apr 2026 at 23:58

Historical Analysis & Change Tracking