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buy123.com.tw Mobile Performance
3/100
These metrics represent real-world Chrome users experience viewing buy123.com.tw 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.
User Loading Experience
First Contentful Paint
Largest Contentful Paint
Cumulative Layout Shift
First Input Delay
Metrics
Total Blocking Time0/100 4,090 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Largest Contentful Paint0/100 15.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive1/100 22.3 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift2/100 1.088
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Speed Index5/100 11.5 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint13/100 6.5 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (18)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 464 KiB
3,050 ms
Defer offscreen images
Potential savings of 200 KiB
1,230 ms
Properly size images
Potential savings of 160 KiB
1,050 ms
Remove unused CSS
Potential savings of 34 KiB
150 ms
Reduce initial server response time
Root document took 710 ms
110 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Reduce the impact of third-party code
Third-party code blocked the main thread for 1,180 ms
Avoid `document.write()`
Does not use passive listeners to improve scrolling performance
Minimize main-thread work
15.5 s
Reduce JavaScript execution time
9.9 s
Serve static assets with an efficient cache policy
58 resources found
Avoid an excessive DOM size
1,690 elements
Avoid enormous network payloads
Total size was 2,764 KiB
Avoid long main-thread tasks
20 long tasks found
Avoid large layout shifts
5 elements found
Keep request counts low and transfer sizes small
136 requests • 2,764 KiB
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
2 chains found
Passed Audits (11)
Serve images in next-gen formats
Minify CSS
Avoid multiple page redirects
Use video formats for animated content
Eliminate render-blocking resources
Enable text compression
Efficiently encode images
Minify JavaScript
All text remains visible during webfont loads
Preload key requests
Preconnect to required origins
buy123.com.tw Mobile SEO
85/100
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.
Document doesn't use legible font sizes
57.72% legible text
Tap targets are not sized appropriately
94% appropriately sized tap targets
Passed Audits (11)
Document has a valid `rel=canonical`
Links are crawlable
Document has a `<title>` element
Page isn’t blocked from indexing
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
robots.txt is valid
Document has a valid `hreflang`
Links have descriptive text
Page has successful HTTP status code
Document has a meta description
Document avoids plugins
buy123.com.tw Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of buy123.com.tw 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 (3)
User Experience
Displays images with incorrect aspect ratio
General
Browser errors were logged to the console
Trust and Safety
Does not use HTTPS
1 insecure request found
Passed Audits (11)
Avoids Application Cache
Links to cross-origin destinations are safe
Avoids requesting the notification permission on page load
Detected JavaScript libraries
Properly defines charset
Avoids front-end JavaScript libraries with known security vulnerabilities
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
Page has the HTML doctype
Avoids deprecated APIs
Serves images with appropriate resolution
buy123.com.tw Mobile Progressive Web App
32/100
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 (8)
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 22.3 s
Current page does not respond with a 200 when offline
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not provide a valid `apple-touch-icon`
Installable
Does not use HTTPS
1 insecure request found
Passed Audits (6)
Registers a service worker that controls page and `start_url`
Content is sized correctly for the viewport
Web app manifest meets the installability requirements
Redirects HTTP traffic to HTTPS
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
buy123.com.tw Mobile Accessibility
82/100
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 (5)
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
Links do not have a discernible name
Form elements do not have associated labels
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (19)
Buttons have an accessible name
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[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.
`[id]` attributes on active, focusable elements are unique
`[role]`s have all required `[aria-*]` attributes
`<html>` element has a `[lang]` attribute
The page contains a heading, skip link, or landmark region
Document has a `<title>` element
`[role]`s are contained by their required parent element
`<html>` element has a valid value for its `[lang]` attribute
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[aria-*]` attributes have valid values
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-*]` attributes are valid and not misspelled
`[aria-*]` attributes match their roles
`[aria-hidden="true"]` elements do not contain focusable descendents
No element has a `[tabindex]` value greater than 0
`[role]` values are valid
Mobile Usability
78/100
These checks validate how easily a visitor can use buy123.com.tw 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
61/100
These checks analyze the performance of buy123.com.tw 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 (4)
Avoid landing page redirects
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify JavaScript
Passed Audits (6)
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Optimize images
Prioritize visible content
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