blog .ynzen .com
4.23
Results collected 2024-04-05 from https://blog.ynzen.com/
Lighthouse Performance
3.05
- About average speed.
- Total Blocking Time: 520 ms 2.80
- Largest Contentful Paint: 4.4 s 1.90
- Cumulative Layout Shift 5.00
- First Contentful Paint: 3.3 s 2.05
- Speed Index: 5.2 s 3.00
- Largest Contentful Paint element 1.00
- Reduce JavaScript execution time 1.00
- Reduce unused CSS 1.00
- Reduce unused JavaScript 1.00
- Max Potential First Input Delay: 360 ms 1.20
- Time to Interactive: 8.2 s 2.00
- Avoid serving legacy JavaScript to modern browsers: Potential savings of 0 KiB 2.50
- Defer offscreen images: Potential savings of 4 KiB 2.50
- Does not use passive listeners to improve scrolling performance: 2.50
- First Meaningful Paint: 3.5 s 3.15
- All text remains visible during webfont loads 5.00
- Avoid chaining critical requests 5.00
- Avoid large layout shifts 5.00
- Avoid large layout shifts 5.00
- Avoid long main-thread tasks 5.00
- Avoid multiple page redirects 5.00
- Avoids
document.write()
5.00 - Avoids an excessive DOM size 5.00
- Avoids enormous network payloads 5.00
- Diagnostics 5.00
- Efficiently encode images 5.00
- Eliminate render-blocking resources 5.00
- Enable text compression 5.00
- Final Screenshot 5.00
- Has a
<meta name="viewport">
tag withwidth
orinitial-scale
5.00 - Image elements have explicit
width
andheight
5.00 - Initial server response time was short 5.00
- Metrics 5.00
- Minify CSS 5.00
- Minify JavaScript 5.00
- Minimize third-party usage 5.00
- Minimizes main-thread work 5.00
- Network Requests 5.00
- Network Round Trip Times 5.00
- Preconnect to required origins 5.00
- Properly size images 5.00
- Remove duplicate modules in JavaScript bundles 5.00
- Resources Summary 5.00
- Screenshot Thumbnails 5.00
- Script Treemap Data 5.00
- Serve images in next-gen formats 5.00
- Server Backend Latencies 5.00
- Tasks 5.00
- Use HTTP/2 5.00
- Use video formats for animated content 5.00
- User Timing marks and measures 5.00
- Uses efficient cache policy on static assets 5.00
- Enable text compression 5.00
Lighthouse SEO
5.00
- The website is really good at SEO!
- Document avoids plugins 5.00
- Document has a
<title>
element 5.00 - Document has a meta description 5.00
- Document has a valid
hreflang
5.00 - Document has a valid
rel=canonical
5.00 - Document uses legible font sizes 5.00
- Has a
<meta name="viewport">
tag withwidth
orinitial-scale
5.00 - Image elements have
[alt]
attributes 5.00 - Links are crawlable 5.00
- Links have descriptive text 5.00
- Page has successful HTTP status code 5.00
- Page isn’t blocked from indexing 5.00
- Tap targets are sized appropriately 5.00
- robots.txt is valid 5.00
Lighthouse Best Practices
3.90
- About average on following good practice
- Uses third-party cookies 1.00
- Avoids deprecated APIs 5.00
- Issues were logged in the
Issues
panel in Chrome Devtools 1.00 - Uses HTTPS 5.00
- Allows users to paste into input fields 5.00
- Avoids
unload
event listeners 5.00 - Avoids requesting the geolocation permission on page load 5.00
- Avoids requesting the notification permission on page load 5.00
- Displays images with correct aspect ratio 5.00
- No browser errors logged to the console 5.00
- Page has the HTML doctype 5.00
- Properly defines charset 5.00
- Serves images with appropriate resolution 5.00
- Detected JavaScript libraries 5.00
- Ensure CSP is effective against XSS attacks 5.00
- Page has valid source maps 5.00
- Uses HTTPS 5.00
- Issues were logged in the
Issues
panel in Chrome Devtools 1.00 - Allows users to paste into input fields 5.00
- Avoids deprecated APIs 5.00
- Page has the HTML doctype 5.00
W3C HTML
4.20
- The tested page has 6 errors in its HTML code.
- Number of grouped error type: 5 4.00
- Number of errors: 6 4.40
- Element X not allowed as child of element X in this context. (Suppressing further errors from this subtree.) (errors of this type: 2 pcs)
- CSS: Parse Error. (errors of this type: 1 pcs)
- Duplicate ID X. (errors of this type: 1 pcs)
- Bad value X for attribute X on element X: Illegal character in query: X is not allowed. (errors of this type: 1 pcs)
- Attribute X not allowed on element X at this point. (errors of this type: 1 pcs)
Standard Files
4.00
- robots.txt seems ok. 5.00
- Sitemap seems to work. 5.00
- RSS subscription found. 5.00
- security.txt is missing. 1.00
Lighthouse A11y
5.00
- The website do not have any apparent issues with accessibility!
- Buttons have an accessible name 5.00
- Image elements have
[alt]
attributes 5.00 [aria-*]
attributes are valid and not misspelled 5.00[aria-*]
attributes have valid values 5.00[aria-*]
attributes match their roles 5.00[aria-hidden="true"]
is not present on the document<body>
5.00[role]
s have all required[aria-*]
attributes 5.00[user-scalable="no"]
is not used in the<meta name="viewport">
element and the[maximum-scale]
attribute is not less than 5. 5.00- Background and foreground colors have a sufficient contrast ratio 5.00
- Document has a
<title>
element 5.00 - Links are distinguishable without relying on color. 5.00
- Links have a discernible name 5.00
<html>
element has a[lang]
attribute 5.00<html>
element has a valid value for its[lang]
attribute 5.00[aria-hidden="true"]
elements do not contain focusable descendents 5.00[id]
attributes on active, focusable elements are unique 5.00[role]
values are valid 5.00- Elements with visible text labels do not have matching accessible names. 1.00
- Heading elements appear in a sequentially-descending order 5.00
- Image elements do not have
[alt]
attributes that are redundant text. 5.00 - Values assigned to
role=""
are valid ARIA roles. 5.00 - Document has a main landmark. 5.00
Sitespeed.io
5.00
- The website is really fast! 5.00
- Speedindex: 396 5.00
- Loading time: 0.856 sec
- Number of requests: 42
Yellow Lab Tools
4.75
- The website has good frontend code. 4.75
- Page weight 4.95
- Requests 4.85
- DOM complexity 4.90
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 4.45
- Bad CSS 4.90
- Web fonts 3.00
- Server config 4.55
- Number of iframes 5.00
- Total JS execution time 5.00
- DOM access 5.00
- Scroll events bound 5.00
- document.write calls 5.00
- Synchronous Ajax requests 5.00
- Rules count 5.00
- Total weight 5.00
- Image optimization 5.00
- Oversized images 5.00
- Gzip/Brotli compression 4.75
- File minification 5.00
- Requests number 5.00
- Different domains 5.00
- 404 not found 5.00
- Connections closed 5.00
- Identical content 4.00
- Below the fold images 5.00
- Webfonts number 2.50
- Overweighted webfonts 2.00
- WOFF 2 5.00
- HTTP protocols 5.00
- TLS protocols 3.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00
- TLS protocols 3.00
- IDs duplicated 4.50
- CSS syntax error 5.00
- Gzip/Brotli compression 4.75
- 404 not found 5.00
- TLS protocols 3.00
Pa11y
4.85
- The website can be more accessible, but is rather good!
- Number of error type: 1 4.80
- Number of errors: 1 4.90
Problems:
- Duplicate id attribute value "__jsx-2617157637" found on the web page.
Integrity & Security
3.09
- Ok integrity but should get better.
- Result generated: 2024-04-05 08:46:15 Etc/UTC (Cached for 24 hours)
- HTTPS by default: is good! 5.00
- HTTP Strict Transport Security HSTS: is ok, with 1 error(s) and 1 warning(s). 4.25
- Content Security Policy: is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging: is good! 5.00
- Referrer Policy: is not that good. 2.50
- Subresource Integrity SRI: is pretty bad. 1.00
- HTTP headers: is good! 5.00
- Cookies: is ok, with 15 error(s) and 0 warning(s). 1.00
HTTP & Tech
3.67
- HTTP to HTTPS redirect 5.00
- TLSv1.3 support 5.00
- TLSv1.2 support 5.00
- No IPv6 support 1.00
- IPv4 support 5.00
- No HTTPv3 support 1.00
- No QUIC support 1.00
Carbon Calculator
4.30
- Webpage generates little carbon dioxide!
- Carbon dioxide per pageview: 0.46 gram(s)
- More green than 86 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
- More green than 87 % of the websites tested by webperf.se (Reference updated: 2021-12-12).
- Network transfer size: 749 kb 4.30