docschina.org

https://docschina.org· First analyzed 08 May 2026· Updated 08 May 2026

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docschina.org

Mobile

Sponsored

Hosting Provider

Tencent Cloud

cloud.tencent.com

IP Address

150.158.119.148

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Shanghai, China

ASN

AS45090

Organization

Tencent Cloud Computing (Beijing) Co., Ltd

Nameservers

f1g1ns1.dnspod.net.f1g1ns2.dnspod.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

873 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

214 KB

124 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

CMS

WordPress

Infrastructure

Hosting

Tencent Cloud

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

CSS Frameworks

Tailwind CSS

Chakra UI Ant Design Material UI

Frameworks

Meta Frameworks

Other

Analytics

SEO Analysis

D48/100

Meta Tags10/15

Content6/12

Headings0/8

Technical9/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

docschina.orgdocschina.org

印记中文 - 深入挖掘国外前端新领域，为国内 Web 前端开发人员提供优质文档！

印记中文，深入挖掘国外前端新领域，为国内 Web 前端开发人员提供优质文档!

Title Length40 chars

Recommended: 50-60 chars (~250px / 580px)

Description Length38 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (117/118) — critical for accessibility and SEO

10 issues found

Upgrade to view details

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.

Sponsored

AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

4/25

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:1%

Words:684

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

58/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

5/20

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

9/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 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.

53/100

A+

26 mg

CO₂e / view

213.7 KB

Page Weight

95%

Cleaner Than

New Visitor

30 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.2 kg

Emission Segments

Data Center

6 mg

Network

6 mg

Device

14 mg

Resource Breakdown

JavaScript

151.4 KB

Images

21.0 KB

CSS

2.1 KB

HTML

29.3 KB

Other

9.8 KB

Green Hosting Not Verified

Tencent Cloud

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

71%Good

Static / Informational

HTTPS

No WAF

43d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

TrustAsia Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.03.2026

Valid Until

21.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

docschina.orgwww.docschina.org

SHA-256 Fingerprint

D3:D9:A8:40:00:C8:65:08:5B:C1:27:6C:05:1F:41:B6:B5:30:F6:6A...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

⚪ Custom(s-maxage=60, stale-while-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 08 May 2026 18:15:03 GMT

etag

"65044-EWeKKqQTip+7Z7ulI26ujcQHvBI"

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz2.qq.com

mxbiz1.qq.com

Domain Information

docschina.org

Domain Age

8y 10m

Created

20.06.2017

Expires

20.06.2027

Last Updated

24.06.2024

Registrar

Xin Net Technology Corporation

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.

70/100

Mobile Friendly1 breakpoint

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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial

63/100

Readability

/30

18/30

16px · LH 1.00

Hierarchy

/20

8/20

WCAG

/25

17/25

1.63:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Body Font

-apple-system

Sans16px

Contrast Ratio

1.63:1

18 issues

Reading Comfort

Single Family

left aligned

16px

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

⚠️ Tight line spacing (1.00). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 1.6:1).

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

Flesch 56

Color Palette

10 unique colors

Light

#ffffff

Primary· 29.2%

#01000f

Background· 19.4%

#121b43

Accent· 15.600000000000001%

#1d3678

Accent· 8.9%

#241d64

Accent· 5.7%

#4e3580

Secondary· 4.6%

#531d67

Accent· 4.4%

#4f81b0

Secondary· 4.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)cdn.wwads.cn(1)

Website Identity

docschina.org

8 years old

Location detected: 🇨🇳 Chinavia ip

Xin Net Technology Corporation

Social Profiles

GitHub

Sponsored

Last analyzed: 08 May 2026 at 18:15

Historical Analysis & Change Tracking