Alexdunn.org Alex Dunn – I build applications and teach people along the way. Ask me about services and training. @Suave_Pirate
I build applications and teach people along the way. Ask me about services and training. @Suave_Pirate
alexdunn.org Mobile Performance
32/100
These metrics represent real-world Chrome users experience viewing alexdunn.org on mobile devices. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
Metrics
Total Blocking Time1/100 2,130 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive10/100 13.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Largest Contentful Paint29/100 4.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index49/100 5.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint74/100 3.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.011
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (20)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 435 KiB
2,850 ms
Defer offscreen images
Potential savings of 384 KiB
2,010 ms
Eliminate render-blocking resources
Potential savings of 1,380 ms
1,384 ms
Serve images in next-gen formats
Potential savings of 146 KiB
600 ms
Remove unused CSS
Potential savings of 113 KiB
600 ms
Minify JavaScript
Potential savings of 34 KiB
450 ms
Properly size images
Potential savings of 9 KiB
120 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid an excessive DOM size
4,966 elements
Does not use passive listeners to improve scrolling performance
Ensure text remains visible during webfont load
Reduce the impact of third-party code
Third-party code blocked the main thread for 3,690 ms
Minimize main-thread work
13.0 s
Reduce JavaScript execution time
4.3 s
Serve static assets with an efficient cache policy
15 resources found
Largest Contentful Paint element
1 element found
User Timing marks and measures
4 user timings
Avoid large layout shifts
1 element found
Avoid long main-thread tasks
20 long tasks found
Keep request counts low and transfer sizes small
119 requests • 1,586 KiB
Avoid chaining critical requests
14 chains found
Passed Audits (10)
Avoids `document.write()`
Use video formats for animated content
Efficiently encode images
Potential savings of 7 KiB
Preload key requests
Enable text compression
Minify CSS
Preconnect to required origins
Initial server response time was short
Root document took 390 ms
Avoids enormous network payloads
Total size was 1,586 KiB
Avoid multiple page redirects
Potential savings of 630 ms
alexdunn.org Mobile SEO
83/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (3)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Image elements do not have `[alt]` attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.
Tap targets are not sized appropriately
93% appropriately sized tap targets
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (10)
Links have descriptive text
Document uses legible font sizes
99.47% legible text
Document avoids plugins
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a valid `hreflang`
Document has a meta description
Page has successful HTTP status code
robots.txt is valid
Document has a `<title>` element
Page isn’t blocked from indexing
alexdunn.org Mobile Best Practices
54/100
These checks highlight opportunities to improve the overall code health of alexdunn.org mobile page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (6)
User Experience
Serves images with low resolution
Displays images with incorrect aspect ratio
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
General
Browser errors were logged to the console
Passed Audits (8)
Allows users to paste into password fields
Page has the HTML doctype
Avoids requesting the notification permission on page load
Detected JavaScript libraries
Avoids Application Cache
Avoids deprecated APIs
Avoids requesting the geolocation permission on page load
Properly defines charset
alexdunn.org Mobile Progressive Web App
25/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (9)
PWA Optimized
Does not set a theme color for the address bar.
Is not configured for a custom splash screen
Manifest doesn't have a maskable icon
Fast and reliable
Page load is not fast enough on mobile networks
Interactive at 13.9 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Passed Audits (5)
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Provides a valid `apple-touch-icon`
alexdunn.org Mobile Accessibility
88/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (4)
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
`[aria-hidden="true"]` elements contain focusable descendents
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Image elements do not have `[alt]` attributes
`<frame>` or `<iframe>` elements do not have a title
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (21)
ARIA IDs are unique
Links have a discernible name
`[role]` values are valid
`<html>` element has a `[lang]` attribute
`[aria-*]` attributes are valid and not misspelled
`[role]`s have all required `[aria-*]` attributes
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Buttons have an accessible name
`[aria-*]` attributes match their roles
`[aria-*]` attributes have valid values
`[role]`s are contained by their required parent element
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
The page contains a heading, skip link, or landmark region
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`<html>` element has a valid value for its `[lang]` attribute
Heading elements appear in a sequentially-descending order
`[aria-hidden="true"]` is not present on the document `<body>`
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Document has a `<title>` element
Mobile Usability
93/100
These checks validate how easily a visitor can use alexdunn.org on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Should Fix (1)
Size tap targets appropriately
Passed Audits (4)
Avoid plugins
Configure the viewport
Size content to viewport
Use legible font sizes
Mobile Speed
70/100
These checks analyze the performance of alexdunn.org on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (6)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify JavaScript
Reduce server response time
Optimize images
Enable compression
Passed Audits (4)
Avoid landing page redirects
Minify CSS
Minify HTML
Prioritize visible content
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