docs .developers .optimizely .com
3.85
Results collected 2024-03-15 from https://docs.developers.optimizely.com/
Lighthouse Performance
1.50
- The website is quite slow.
- Total Blocking Time: 2,120 ms 1.00
- Largest Contentful Paint: 7.8 s 1.00
- Cumulative Layout Shift 5.00
- First Contentful Paint 1.00
- Speed Index: 8.5 s 1.00
- Eliminate render-blocking resources 1.00
- First Meaningful Paint: 7.6 s 1.00
- Largest Contentful Paint element 1.00
- Max Potential First Input Delay 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
- Remove duplicate modules in JavaScript bundles 1.00
- Time to Interactive: 22.5 s 1.00
- Avoid enormous network payloads: Total size was 3,008 KiB 2.50
- Avoid serving legacy JavaScript to modern browsers: Potential savings of 127 KiB 2.50
- Defer offscreen images: Potential savings of 2 KiB 2.50
- Ensure text remains visible during webfont load: 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 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
- 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 withwidth
orinitial-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
4.99
- The website is fast. 4.99
- Speedindex: 512 4.99
- Loading time: 1.21s
- Number of requests: 109
Yellow Lab Tools
3.50
- The website is neither good nor bad. 3.50
- Page weight 1.00
- Requests 4.55
- DOM complexity 4.90
- JS complexity 4.10
- Bad JS 4.95
- jQuery 5.00
- CSS complexity 1.05
- Bad CSS 2.65
- Web fonts 3.30
- Server config 4.50
- Number of iframes 5.00
- Total JS execution time 3.40
- 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 4.55
- File minification 1.00
- Requests number 4.00
- 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 4.50
- CSS syntax error 5.00
- Gzip/Brotli compression 4.55
- 404 not found 5.00
- TLS protocols 4.00
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
2.91
- Rather poor on user privacy.
- Result generated: 2024-03-15 15:55:20 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