Tibf.ir نمایشگاه بینالمللی کتاب تهران - خانه
نمایشگاه بینالمللی کتاب تهران - Tehran Internation Book Fair
tibf.ir Mobile Performance
12/100
These metrics represent real-world Chrome users experience viewing tibf.ir 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
Cumulative Layout Shift
First Input Delay
First Contentful Paint
Largest Contentful Paint
Metrics
Speed Index0/100 19.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint0/100 10.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive11/100 13.6 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint15/100 6.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Total Blocking Time15/100 1,080 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift85/100 0.12
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (21)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 2,903 KiB
12,450 ms
Eliminate render-blocking resources
Potential savings of 6,630 ms
6,626 ms
Properly size images
Potential savings of 371 KiB
2,100 ms
Reduce initial server response time
Root document took 2,190 ms
1,588 ms
Avoid multiple page redirects
Potential savings of 1,110 ms
1,110 ms
Remove unused CSS
Potential savings of 17 KiB
900 ms
Remove unused JavaScript
Potential savings of 88 KiB
900 ms
Use video formats for animated content
Potential savings of 54 KiB
300 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 1,020 ms
Ensure text remains visible during webfont load
Does not use passive listeners to improve scrolling performance
Minimize main-thread work
10.7 s
Serve static assets with an efficient cache policy
146 resources found
Avoid enormous network payloads
Total size was 5,097 KiB
Reduce JavaScript execution time
4.9 s
Avoids an excessive DOM size
820 elements
Largest Contentful Paint element
1 element found
Avoid large layout shifts
5 elements found
Avoid chaining critical requests
43 chains found
Keep request counts low and transfer sizes small
191 requests • 5,097 KiB
Avoid long main-thread tasks
20 long tasks found
Passed Audits (8)
Defer offscreen images
Avoids `document.write()`
Preload key requests
Efficiently encode images
Minify CSS
Potential savings of 3 KiB
Enable text compression
Preconnect to required origins
Minify JavaScript
tibf.ir Mobile SEO
79/100
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)
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
48% appropriately sized tap targets
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
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (9)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page isn’t blocked from indexing
Document has a meta description
Document has a `<title>` element
Page has successful HTTP status code
Links have descriptive text
Document uses legible font sizes
80.41% legible text
Document avoids plugins
Document has a valid `hreflang`
tibf.ir Mobile Best Practices
54/100
These checks highlight opportunities to improve the overall code health of tibf.ir 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)
Trust and Safety
Does not use HTTPS
2 insecure requests found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
14 vulnerabilities detected
General
Browser errors were logged to the console
User Experience
Serves images with low resolution
Displays images with incorrect aspect ratio
Passed Audits (8)
Detected JavaScript libraries
Properly defines charset
Avoids requesting the geolocation permission on page load
Avoids deprecated APIs
Avoids requesting the notification permission on page load
Avoids Application Cache
Page has the HTML doctype
Allows users to paste into password fields
tibf.ir Mobile Progressive Web App
21/100
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 (10)
PWA Optimized
Does not provide a valid `apple-touch-icon`
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
Installable
Does not use HTTPS
2 insecure requests found
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 13.6 s
Passed Audits (4)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Contains some content when JavaScript is not available
tibf.ir Mobile Accessibility
78/100
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)
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.
Links do not have a discernible name
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (14)
`[role]`s have all required `[aria-*]` attributes
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-hidden="true"]` is not present on the document `<body>`
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[role]` values are valid
Buttons have an accessible name
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
The page contains a heading, skip link, or landmark region
`<html>` element has a `[lang]` attribute
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[id]` attributes on active, focusable elements are unique
`[role]`s are contained by their required parent element
`<html>` element has a valid value for its `[lang]` attribute
Mobile Usability
88/100
These checks validate how easily a visitor can use tibf.ir 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 (2)
Size tap targets appropriately
Size content to viewport
Passed Audits (3)
Avoid plugins
Configure the viewport
Use legible font sizes
Mobile Speed
28/100
These checks analyze the performance of tibf.ir 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 (7)
Optimize images
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Avoid landing page redirects
Minify CSS
Minify JavaScript
Enable compression
Passed Audits (3)
Reduce server response time
Minify HTML
Prioritize visible content
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