docs .developers .optimizely .com

3.61

Results collected 2024-04-05 from https://docs.developers.optimizely.com/

Lighthouse Performance

2.25

The website is quite slow.
Total Blocking Time: 1,850 ms 1.00
Largest Contentful Paint: 4.0 s 2.50
Cumulative Layout Shift 5.00
Speed Index: 8.0 s 1.05
First Contentful Paint: 4.0 s 1.20
Eliminate render-blocking resources 1.00
Largest Contentful Paint element 1.00
Max Potential First Input Delay: 690 ms 1.00
Minimize main-thread work 1.00
Reduce JavaScript execution time 1.00
Reduce the impact of third-party code 1.00
Reduce unused CSS 1.00
Reduce unused JavaScript 1.00
Time to Interactive: 21.2 s 1.00
Avoid enormous network payloads: Total size was 3,057 KiB 2.50
Avoid serving legacy JavaScript to modern browsers: Potential savings of 133 KiB 2.50
Defer offscreen images: Potential savings of 2 KiB 2.50
Ensure text remains visible during webfont load: 2.50
First Meaningful Paint: 4.0 s 2.50
Remove duplicate modules in JavaScript bundles: Potential savings of 84 KiB 2.50
Serve static assets with an efficient cache policy: 6 resources found 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
Avoid non-composited animations 5.00
Avoids document.write() 5.00
Avoids an excessive DOM size 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
Metrics 5.00
Minify CSS 5.00
Minify JavaScript 5.00
Network Requests 5.00
Network Round Trip Times 5.00
Preconnect to required origins 5.00
Properly size images 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 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.
Document does not have a meta description 1.00
Tap targets are not sized appropriately: 98% appropriately sized tap targets 4.35
Document avoids plugins 5.00
Document has a <title> element 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 with width or initial-scale 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
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

3.70

The tested page has 16 errors in its HTML code.
Number of grouped error type: 5 4.00
Number of errors: 16 3.40
Attribute X not allowed on element X at this point. (errors of this type: 6 pcs)
Element X not allowed as child of element X in this context. (Suppressing further errors from this subtree.) (errors of this type: 5 pcs)
CSS: X: Too many values or values are not recognized. (errors of this type: 3 pcs)
Element X is missing one or more of the following attributes: X, X. (errors of this type: 1 pcs)
CSS: Parse Error. (errors of this type: 1 pcs)

Standard Files

2.88

robots.txt seems ok. 5.00
Sitemap is not specified in robots.txt 1.00
RSS subscription is missing in the HTMLs metadata. 4.50
security.txt has wrong content. 1.00

Lighthouse A11y

4.55

The website can be more accessible, but is rather good!
<html> element does not have a [lang] attribute 1.00
[id] attributes on active, focusable elements are not unique 1.00
Buttons have an accessible name 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
Form elements have associated labels 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
No element has a [tabindex] value greater than 0 5.00
<frame> or <iframe> elements have a title 5.00
[role] values are valid 5.00
Heading elements appear in a sequentially-descending order 5.00
Values assigned to role="" are valid ARIA roles. 5.00
Document has a main landmark. 5.00
Identical links have the same purpose. 5.00

Sitespeed.io

4.84

The website is fast. 4.84
Speedindex: 655 4.84
Loading time: 1.33s
Number of requests: 121

Yellow Lab Tools

3.35

The website is neither good nor bad. 3.35
Page weight 1.00
Requests 4.50
DOM complexity 5.00
JS complexity 4.00
Bad JS 5.00
jQuery 5.00
CSS complexity 1.00
Bad CSS 1.00
Web fonts 3.30
Server config 4.50
Number of iframes 5.00
Total JS execution time 3.25
DOM access 5.00
Scroll events bound 5.00
document.write calls 5.00
Synchronous Ajax requests 5.00
Rules count 1.00
Total weight 1.00
Image optimization 5.00
Oversized images 5.00
Gzip/Brotli compression 4.45
File minification 1.00
Requests number 3.90
Different domains 3.35
404 not found 5.00
Connections closed 5.00
Identical content 5.00
Below the fold images 5.00
Webfonts number 2.50
Overweighted webfonts 3.25
WOFF 2 5.00
HTTP protocols 5.00
TLS protocols 4.00
Caching disabled 4.25
Caching not specified 5.00
Caching too short 3.25
TLS protocols 4.00
IDs duplicated 5.00
CSS syntax error 1.00
Gzip/Brotli compression 4.45
404 not found 5.00
TLS protocols 4.00

Pa11y

3.80

The accessibility is apparently really bad! Probably both for disabled people and everyone of us when we need some accessibility!
Number of error type: 7 3.60
Number of errors: 10 4.00

Problems:

A form field should be labelled in some way. Use the label element (either with a "for" attribute or wrapped around the form field), or "title", "aria-label" or "aria-labelledby" attributes as appropriate.
A textinput element does not have a name available to an accessibility API. Valid names are: label element, title undefined, aria-label undefined, aria-labelledby undefined.
Iframe element requires a non-empty title attribute that identifies the frame.
A textarea element does not have a name available to an accessibility API. Valid names are: label element, title undefined, aria-label undefined, aria-labelledby undefined.
A link points to a named anchor "content" within the document, but no anchor exists with that name.
The html element should have a lang or xml:lang attribute which describes the language of the document.
Duplicate id attribute value "searchWidgetTrigger" found on the web page.

Integrity & Security

2.91

Rather poor on user privacy.
Result generated: 2024-04-05 08:35:11 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 pretty bad. 1.00
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

5.00

HTTP to HTTPS redirect 5.00
TLSv1.3 support 5.00
TLSv1.2 support 5.00
IPv6 support 5.00
IPv4 support 5.00
HTTPv3 support 5.00
QUIC support 5.00

Carbon Calculator

1.60

The webpage generates some more carbon dioxide than is preferable :/
Carbon dioxide per pageview: 1.88 gram(s)
More green than 32 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
More green than 33 % of the websites tested by webperf.se (Reference updated: 2021-12-12).
Network transfer size: 3 mb 1.60