Usnvc.org The U.S. National Vegetation Classification
usnvc.org Mobile Performance
84/100
These metrics represent real-world Chrome users experience viewing usnvc.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
Speed Index59/100 5.3 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint76/100 3.1 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint80/100 2.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive95/100 3.2 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time100/100 80 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (9)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 1,650 ms
1,650 ms
Reduce initial server response time
Root document took 1,890 ms
1,287 ms
Enable text compression
Potential savings of 56 KiB
750 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Serve static assets with an efficient cache policy
23 resources found
Avoid long main-thread tasks
3 long tasks found
Avoid chaining critical requests
18 chains found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
34 requests • 299 KiB
Avoid large layout shifts
5 elements found
Passed Audits (20)
Preconnect to required origins
Efficiently encode images
Minify CSS
Serve images in next-gen formats
Defer offscreen images
Avoid multiple page redirects
Preload key requests
Remove unused CSS
Potential savings of 12 KiB
Uses passive listeners to improve scrolling performance
Minify JavaScript
Avoids `document.write()`
Minimizes main-thread work
1.1 s
Avoids enormous network payloads
Total size was 299 KiB
Use video formats for animated content
Remove unused JavaScript
Avoids an excessive DOM size
194 elements
All text remains visible during webfont loads
Properly size images
Minimize third-party usage
Third-party code blocked the main thread for 20 ms
JavaScript execution time
0.5 s
usnvc.org Mobile SEO
71/100
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 (4)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
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.
Document doesn't use legible font sizes
Tap targets are not sized appropriately
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Passed Audits (10)
Links are crawlable
Page has successful HTTP status code
Document avoids plugins
Image elements have `[alt]` attributes
Document has a valid `rel=canonical`
Page isn’t blocked from indexing
Document has a `<title>` element
robots.txt is valid
Document has a valid `hreflang`
Links have descriptive text
usnvc.org Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of usnvc.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 (5)
User Experience
Serves images with low resolution
Browser Compatibility
Page lacks the HTML doctype, thus triggering quirks-mode
Trust and Safety
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Does not use HTTPS
24 insecure requests found
Passed Audits (9)
No browser errors logged to the console
Displays images with correct aspect ratio
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Detected JavaScript libraries
Avoids requesting the notification permission on page load
Avoids deprecated APIs
Allows users to paste into password fields
Properly defines charset
usnvc.org Mobile Progressive Web App
29/100
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 (12)
PWA Optimized
Does not provide a valid `apple-touch-icon`
Manifest doesn't have a maskable icon
Content is not sized correctly for the viewport
Does not redirect HTTP traffic to HTTPS
Does not set a theme color for the address bar.
Is not configured for a custom splash screen
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
24 insecure requests found
Web app manifest does not meet the installability requirements
Passed Audits (2)
Contains some content when JavaScript is not available
Page load is fast enough on mobile networks
usnvc.org Mobile Accessibility
100/100
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.
Passed Audits (11)
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Background and foreground colors have a sufficient contrast ratio
Links have a discernible name
`<html>` element has a `[lang]` attribute
`[aria-hidden="true"]` is not present on the document `<body>`
Heading elements appear in a sequentially-descending order
Image elements have `[alt]` attributes
`<html>` element has a valid value for its `[lang]` attribute
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
The page contains a heading, skip link, or landmark region
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