javascript30.com

https://javascript30.com· First analyzed 20 May 2026· Updated 20 May 2026

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javascript30.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.10.130

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

tim.ns.cloudflare.com.asa.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

591 ms10%

Speed Index

768 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.7 MB

62 requests

Image Optimization

Cloudinary

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Platform

Render

CDN

Cloudflare

Technology Stack

4 Technologies Detected

Analytics

CSS Frameworks

CDN

SEO Analysis

D59/100

Meta Tags5/15

Content11/12

Headings8/8

Technical10/21

E-E-A-T0/7

Images4/7

Links4/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

javascript30.comjavascript30.com

JavaScript 30 — Build 30 things with vanilla JS in 30 days with 30 ...

Build 30 things with vanilla JS in 30 days with 30 tutorials

Title truncated.

Title Length76 chars

Recommended: 50-60 chars (~450px / 580px)

Description Length60 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (76 chars, ~450px). Will be truncated in search results.

7 issues found

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Local SEO

Local Search Readiness

5/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

12/25

Schema Data

0/25

Citation

10/25

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

code blocks

Text ratio:23%

Words:1,317

Token eff.:Optimal

Sections/1K:36.4

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 5.3w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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Sponsored

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.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

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.

44/100

177 mg

CO₂e / view

1.7 MB

Page Weight

60%

Cleaner Than

New Visitor

202 mg

Returning (cached)

101 mg

Annual (10K/mo)

21.2 kg

Emission Segments

Data Center

9 mg

Network

52 mg

Device

116 mg

Resource Breakdown

JavaScript

72.5 KB

Images

1.3 MB

CSS

362.4 KB

HTML

6.4 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

64d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

25.04.2026

Valid Until

24.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

javascript30.com

SHA-256 Fingerprint

AB:01:5C:3D:6B:38:42:9C:A8:8B:B5:AE:55:75:26:A3:CF:68:72:22...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray

9fed89c569627e99-BOS

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Wed, 20 May 2026 18:52:23 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

javascript30.com

Domain Age

10y 6m

Created

06.11.2015

Expires

06.11.2026

Last Updated

07.10.2025

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

52/100

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.

Viewport

width=device-width, initial-scale=1

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

adam.cg_proregular + Helvetica Neue

WCAG Partial

72/100

Readability

/30

24/30

16px · LH 1.70

Hierarchy

/20

16/20

18.75x ratio · ✓ H1→H6

WCAG

/25

17/25

1:1 min contrast

Performance

/25

15/25

System fonts

Heading Font

adam.cg_proregular

Sans300px

Body Font

Helvetica Neue

Sans16px

Contrast Ratio

1:1

2 issues

Reading Comfort

~34 CPL

Narrow lines

300px

80px

20px

16px

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

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 18.8x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Buy on MyFontsFlesch 64

Color Palette

7 unique colors

Light

#ffffff

Background· 15.100000000000001%

#201f46

Secondary· 43%

#090209

Primary· 24.7%

#3d2c4e

Secondary· 4.8%

#594b62

Secondary· 4.6%

#d8c793

Secondary· 4.3%

#151128

Primary· 3.5%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

platform.twitter.com(3)google-analytics.com(1)gstatic.com(1)google.com(1)local(1)

Website Identity

javascript30.com

wes@wesbos.com

10 years old

Location detected: 🇨🇦 Canadavia ip

Cloudflare, Inc.en

Social Profiles

Facebook X (Twitter)

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Last analyzed: 20 May 2026 at 18:52

Historical Analysis & Change Tracking