Tibf.ir نمایشگاه بینالمللی کتاب تهران - خانه
نمایشگاه بینالمللی کتاب تهران - Tehran Internation Book Fair
tibf.ir Desktop Performance
46/100
These metrics represent real-world Chrome users experience viewing tibf.ir web page. 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 Index1/100 6.6 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint16/100 4.1 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint26/100 2.1 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive77/100 3.2 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift84/100 0.122
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time90/100 150 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (20)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 2,470 ms
2,470 ms
Serve images in next-gen formats
Potential savings of 3,901 KiB
2,040 ms
Reduce initial server response time
Root document took 1,110 ms
511 ms
Avoid multiple page redirects
Potential savings of 340 ms
340 ms
Properly size images
Potential savings of 432 KiB
280 ms
Efficiently encode images
Potential savings of 731 KiB
200 ms
Remove unused CSS
Potential savings of 17 KiB
160 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Reduce the impact of third-party code
Third-party code blocked the main thread for 250 ms
Does not use passive listeners to improve scrolling performance
Serve static assets with an efficient cache policy
157 resources found
Avoid enormous network payloads
Total size was 6,512 KiB
Minimize main-thread work
3.5 s
Reduce JavaScript execution time
1.4 s
Avoids an excessive DOM size
812 elements
Avoid chaining critical requests
44 chains found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
193 requests • 6,512 KiB
Avoid long main-thread tasks
10 long tasks found
Avoid large layout shifts
5 elements found
Passed Audits (9)
Enable text compression
Remove unused JavaScript
Potential savings of 88 KiB
Preload key requests
Minify JavaScript
Minify CSS
Potential savings of 3 KiB
Use video formats for animated content
Potential savings of 54 KiB
Avoids `document.write()`
Defer offscreen images
Preconnect to required origins
tibf.ir Desktop SEO
80/100
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 (2)
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
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
Passed Audits (8)
Page has successful HTTP status code
Document has a meta description
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a `<title>` element
Page isn’t blocked from indexing
Document avoids plugins
Document has a valid `hreflang`
Links have descriptive text
tibf.ir Desktop Best Practices
62/100
These checks highlight opportunities to improve the overall code health of tibf.ir 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
Displays images with incorrect aspect ratio
General
Browser errors were logged to the console
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
14 vulnerabilities detected
Does not use HTTPS
2 insecure requests found
Links to cross-origin destinations are unsafe
Passed Audits (9)
Allows users to paste into password fields
Serves images with appropriate resolution
Detected JavaScript libraries
Page has the HTML doctype
Avoids requesting the notification permission on page load
Properly defines charset
Avoids deprecated APIs
Avoids Application Cache
Avoids requesting the geolocation permission on page load
tibf.ir Desktop Progressive Web App
19/100
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)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 15.2 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
PWA Optimized
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Does not provide a valid `apple-touch-icon`
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
2 insecure requests found
Web app manifest does not meet the installability requirements
Passed Audits (3)
Redirects HTTP traffic to HTTPS
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
tibf.ir Desktop Accessibility
77/100
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.
`<frame>` or `<iframe>` elements do not have a title
Links do not have a discernible name
Image elements do not have `[alt]` attributes
Form elements do not have associated labels
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (17)
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`<html>` element has a `[lang]` attribute
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[role]`s have all required `[aria-*]` attributes
The page contains a heading, skip link, or landmark region
Heading elements appear in a sequentially-descending order
Document has a `<title>` element
`[role]`s are contained by their required parent element
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`<html>` element has a valid value for its `[lang]` attribute
`[role]` values are valid
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
Buttons have an accessible name
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`[id]` attributes on active, focusable elements are unique
`[aria-hidden="true"]` is not present on the document `<body>`
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Desktop Speed
38/100
These checks analyze the performance of tibf.ir on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (8)
Optimize images
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Avoid landing page redirects
Minify CSS
Minify HTML
Minify JavaScript
Enable compression
Passed Audits (2)
Reduce server response time
Prioritize visible content
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