jstemerdink .blog

3.75

Results collected 2024-04-05 from https://jstemerdink.blog/

Lighthouse Performance

1.85

The website is quite slow.
Total Blocking Time: 2,030 ms 1.00
Largest Contentful Paint: 6.2 s 1.00
Cumulative Layout Shift: 0.089 4.60
First Contentful Paint: 3.8 s 1.40
Speed Index: 4.9 s 3.25
Avoid an excessive DOM size 1.00
Eliminate render-blocking resources 1.00
Largest Contentful Paint element 1.00
Max Potential First Input Delay: 700 ms 1.00
Minimize main-thread work 1.00
Preconnect to required origins 1.00
Properly size images 1.00
Reduce unused CSS 1.00
Reduce unused JavaScript 1.00
First Meaningful Paint: 5.3 s 1.25
Avoid serving legacy JavaScript to modern browsers: Potential savings of 12 KiB 2.50
Defer offscreen images: Potential savings of 8 KiB 2.50
Ensure text remains visible during webfont load: 2.50
Minify JavaScript: Potential savings of 17 KiB 2.50
Serve images in next-gen formats: Potential savings of 129 KiB 2.50
Serve static assets with an efficient cache policy: 3 resources found 2.50
Time to Interactive: 7.3 s 2.50
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 enormous network payloads 5.00
Diagnostics 5.00
Efficiently encode images 5.00
Enable text compression 5.00
Final Screenshot 5.00
Has a <meta name="viewport"> tag with width or initial-scale 5.00
Image elements have explicit width and height 5.00
Initial server response time was short 5.00
JavaScript execution time 5.00
Metrics 5.00
Minify CSS 5.00
Minimize third-party usage 5.00
Network Requests 5.00
Network Round Trip Times 5.00
Remove duplicate modules in JavaScript bundles 5.00
Resources Summary 5.00
Screenshot Thumbnails 5.00
Script Treemap Data 5.00
Server Backend Latencies 5.00
Tasks 5.00
Use HTTP/2 5.00
Use video formats for animated content 5.00
Uses passive listeners to improve scrolling performance 5.00
Enable text compression 5.00

Lighthouse SEO

4.55

Pretty good at SEO, but still has some potential improvements.
Links are not crawlable 1.00
Tap targets are not sized appropriately: 89% appropriately sized tap targets 3.95
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 uses legible font sizes 5.00
Has a <meta name="viewport"> tag with width or initial-scale 5.00
Image elements have [alt] attributes 5.00
Links have descriptive text 5.00
Page has successful HTTP status code 5.00
Page isn’t blocked from indexing 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

3.20

The tested page has 24 errors in its HTML code.
Number of grouped error type: 6 3.80
Number of errors: 24 2.60
Duplicate ID X. (errors of this type: 9 pcs)
Attribute X not allowed on element X at this point. (errors of this type: 6 pcs)
The X attribute on the X element is obsolete. Use CSS instead. (errors of this type: 4 pcs)
CSS: Unknown pseudo-element or pseudo-class X. (errors of this type: 2 pcs)
Element X not allowed as child of element X in this context. (Suppressing further errors from this subtree.) (errors of this type: 2 pcs)
The X attribute was specified, but the element is not a property of any item. (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

4.65

The website can be more accessible, but is rather good!
Background and foreground colors do not have a sufficient contrast ratio. 1.00
Links do not have a discernible name 1.00
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
Cells in a <table> element that use the [headers] attribute refer to table cells within the same table. 5.00
Document has a <title> element 5.00
Form elements have associated labels 5.00
Links are distinguishable without relying on color. 5.00
List items (<li>) are contained within <ul>, <ol> or <menu> parent elements 5.00
Lists contain only <li> elements and script supporting elements (<script> and <template>). 5.00
Select elements have associated label elements. 5.00
<frame> or <iframe> elements have a title 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
[role] values are valid 5.00
Heading elements appear in a sequentially-descending order 5.00
Skip links are focusable. 5.00
Image elements do not have [alt] attributes that are redundant text. 5.00
Tables have different content in the summary attribute and <caption>. 5.00
Values assigned to role="" are valid ARIA roles. 5.00
Identical links have the same purpose. 5.00
Tables use <caption> instead of cells with the [colspan] attribute to indicate a caption. 5.00

Sitespeed.io

4.98

The website is fast. 4.98
Speedindex: 518 4.98
Loading time: 0.501 sec
Number of requests: 58

Yellow Lab Tools

4.50

The website has good frontend code. 4.50
Page weight 4.95
Requests 5.00
DOM complexity 4.90
JS complexity 4.60
Bad JS 4.95
jQuery 5.00
CSS complexity 1.00
Bad CSS 3.10
Web fonts 2.50
Server config 5.00
Number of iframes 5.00
Total JS execution time 5.00
DOM access 4.75
Scroll events bound 2.85
document.write calls 5.00
Synchronous Ajax requests 5.00
Rules count 1.00
Total weight 5.00
Image optimization 4.75
Oversized images 5.00
Gzip/Brotli compression 5.00
File minification 4.90
Requests number 5.00
Different domains 5.00
404 not found 5.00
Connections closed 5.00
Identical content 5.00
Below the fold images 5.00
Webfonts number 1.00
Overweighted webfonts 5.00
WOFF 2 5.00
HTTP protocols 5.00
TLS protocols 5.00
Caching disabled 5.00
Caching not specified 5.00
Caching too short 5.00
jQuery version 5.00
TLS protocols 5.00
IDs duplicated 4.50
CSS syntax error 5.00
Gzip/Brotli compression 5.00
404 not found 5.00
TLS protocols 5.00

Pa11y

1.80

Number of error type: 12 2.60
Number of errors: 228 1.00

Problems:

A element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of 3.72:1. Recommendation: change text colour to #6c6e76.
A element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of 4.16:1. Recommendation: change text colour to #74767e.
Anchor element found with a valid href attribute, but no link content has been supplied.
Iframe element requires a non-empty title attribute that identifies the frame.
A element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of 4.2:1. Recommendation: change text colour to #73777d.
Anchor element found with no link content and no name and/or ID attribute.
Duplicate id attribute value "jp-post-flair" found on the web page.
Fieldset does not contain a legend element. All fieldsets should contain a legend element that describes a description of the field group.
Heading tag found with no content. Text that is not intended as a heading should not be marked up with heading tags.
A element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of 2.85:1. Recommendation: change text colour to #767676.
Info: Too many unique problems to show them all.

Integrity & Security

3.31

Ok integrity but should get better.
Result generated: 2024-04-05 08:44:23 Etc/UTC (Cached for 24 hours)
HTTPS by default: is good! 5.00
HTTP Strict Transport Security HSTS: is ok, with 2 error(s) and 0 warning(s). 4.00
Content Security Policy: is pretty bad. 1.00
Reporting CSP Certificate Transparency Network Error Logging: is good! 5.00
Referrer Policy: is pretty bad. 1.00
Subresource Integrity SRI: is pretty bad. 1.00
HTTP headers: is ok, with 1 error(s) and 0 warning(s). 4.50
Cookies: is good! 5.00

HTTP & Tech

4.56

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
HTTPv3 support 5.00
QUIC support 5.00