jakejon .es

4.26

Results collected 2024-04-05 from https://jakejon.es/

Lighthouse Performance

4.75

The website is fast.
Total Blocking Time 5.00
Largest Contentful Paint: 2.8 s 4.15
Cumulative Layout Shift: 0.057 4.90
First Contentful Paint 5.00
Speed Index 5.00
Largest Contentful Paint element 1.00
Preconnect to required origins 1.00
Preload Largest Contentful Paint image 1.00
Avoid serving legacy JavaScript to modern browsers: Potential savings of 0 KiB 2.50
Ensure text remains visible during webfont load: 2.50
Image elements do not have explicit width and height: 2.50
Serve static assets with an efficient cache policy: 7 resources found 2.50
First Meaningful Paint: 1.8 s 4.85
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
Avoid non-composited animations 5.00
Avoids document.write() 5.00
Avoids an excessive DOM size 5.00
Avoids enormous network payloads 5.00
Defer offscreen images 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 with width or initial-scale 5.00
Initial server response time was short 5.00
JavaScript execution time 5.00
Largest Contentful Paint image was not lazily loaded 5.00
Max Potential First Input Delay 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
Properly size images 5.00
Reduce unused CSS 5.00
Reduce unused JavaScript 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
Time to Interactive 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

4.60

Pretty good at SEO, but still has some potential improvements.
Document does not have a meta description 1.00
Document avoids plugins 5.00
Document has a <title> element 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 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

Lighthouse Best Practices

5.00

The website is adhering to good practice according to Google Lighthouse!
Avoids deprecated APIs 5.00
Avoids third-party cookies 5.00
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
No issues in the Issues panel in Chrome Devtools 5.00
Page has the HTML doctype 5.00
Properly defines charset 5.00
Serves images with appropriate resolution 5.00
Ensure CSP is effective against XSS attacks 5.00
Page has valid source maps 5.00
Uses HTTPS 5.00
No issues in the Issues panel in Chrome Devtools 5.00
Allows users to paste into input fields 5.00
Avoids deprecated APIs 5.00
Page has the HTML doctype 5.00

W3C HTML

4.60

The tested page has 4 errors in its HTML code.
Number of grouped error type: 2 4.60
Number of errors: 4 4.60
Element X is missing required attribute X. (errors of this type: 2 pcs)
An X element must have an X attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images. (errors of this type: 2 pcs)

Standard Files

1.88

robots.txt is missing, not allowed to download or has no expected content. 1.00
Sitemap is not specified in robots.txt 1.00
RSS subscription is missing in the HTMLs metadata. 4.50
security.txt is missing. 1.00

Lighthouse A11y

4.65

The website can be more accessible, but is rather good!
<html> element does not have a [lang] attribute 1.00
Image elements have [alt] attributes 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
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
[role] values are valid 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

Sitespeed.io

4.70

The website is fast. 4.70
Speedindex: 796 4.70
Loading time: 1.02s
Number of requests: 12

Yellow Lab Tools

4.90

The website has good frontend code. 4.90
Page weight 5.00
Requests 5.00
DOM complexity 5.00
JS complexity 5.00
Bad JS 5.00
jQuery 5.00
CSS complexity 4.55
Bad CSS 4.50
Web fonts 5.00
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 5.00
File minification 5.00
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 5.00
Overweighted webfonts 5.00
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 5.00
CSS syntax error 5.00
Gzip/Brotli compression 5.00
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:

The html element should have a lang or xml:lang attribute which describes the language of the document.

Integrity & Security

2.94

Rather poor on user privacy.
Result generated: 2024-04-05 08:44:44 Etc/UTC (Cached for 24 hours)
HTTPS by default: is good! 5.00
HTTP Strict Transport Security HSTS: is pretty bad. 1.00
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

3.22

HTTP to HTTPS redirect 5.00
No TLSv1.3 support 1.00
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

5.00

Webpage generates very little carbon dioxide!
Carbon dioxide per pageview: 0.09 gram(s)
More green than 99 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
More green than 99 % of the websites tested by webperf.se (Reference updated: 2021-12-12).
Network transfer size: 152 kb 5.00