Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.213463] map[node:map[boundingRect:map[bottom:14870 height:14531 left:0 right:412 top:339 width:412] lhId:page-7-DIV nodeLabel:THE BEST INFORMATION SOURCES OF WIKIPEDIA The BestRef database analyzes 4,219,… path:1,HTML,1,BODY,2,DIV selector:body > div.media__container snippet:<div class="media__container"> type:node] score:0.213463 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:116.383 source:map[type:text value:[unattributed]]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
body `body`	bestref.net/images/main-bg01.jpg	669.0 KiB	415.4 KiB
THE BEST INFORMATION SOURCES OF WIKIPEDIA The BestRef database analyzes 4,219,… `body > div.media__container > div.media`	bestref.net/images/media-bg.png	225.0 KiB	162.1 KiB
BestRef `div.container > div.main__logo > a > img`	bestref.net/images/main-logo.png	132.1 KiB	116.1 KiB
LOGIN `div.container > header#header > div.header__btn > button.header__btn--log`	bestref.net/images/log-bg.png	9.7 KiB	8.6 KiB
SEARCH `div.main__logo > div > form > button.form__btn`	bestref.net/images/popup-btn.png	8.8 KiB	8.0 KiB
SIGN IN `div.container > header#header > div.header__btn > button.header__btn--sign`	bestref.net/images/sign-bg.png	8.8 KiB	7.7 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:11014.527 label:Time to first byte subpart:timeToFirstByte] map[duration:740.345 label:Element render delay subpart:elementRenderDelay]]

lhId: page-6-P

nodeLabel: The BestRef database analyzes 4,219,467 websites across 323 language editions o…

path: 1,HTML,1,BODY,2,DIV,0,DIV,0,DIV,1,P

selector: div.media__container > div.media > div.media__name > p

snippet: <p>

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
bestref.net/css/style2.css	3.4 KiB
bestref.net/css/style.css?ver=1.03	7.5 KiB	289 ms
/css?family=Montserrat:100,100italic,200,200italic,300,30...	1.5 KiB	865 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2	15 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 10.6 s

URL	Time Spent
bestref.net/	10.7 s

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
THE BEST INFORMATION SOURCES OF WIKIPEDIA The BestRef database analyzes 4,219,… `body > div.media__container`	0.213

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Style & Layout	3.4 s
Rendering	2.7 s
Other	2.0 s
Script Evaluation	105 ms
Parse HTML & CSS	92 ms
Script Parsing & Compilation	27 ms

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 21.3 KiB

URL	Transfer Size	Est Savings
code.jquery.com/jquery-3.5.1.min.js	30.2 KiB	21.3 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
BestRef `div.container > div.main__logo > a > img`	bestref.net/images/main-logo.png
div.footer__bottom > div.footer__toTop > a.scroll__link > img `div.footer__bottom > div.footer__toTop > a.scroll__link > img`	bestref.net/images/footer-toTop.png
header#header > div.header__btn > button.header__btn--log > img `header#header > div.header__btn > button.header__btn--log > img`	bestref.net/images/btn-lock.png
header#header > div.header__btn > button.header__btn--sign > img `header#header > div.header__btn > button.header__btn--sign > img`	bestref.net/images/btn-lock.png
div.header__mobile > div.header__btn--mob > button.header__btn--log > img `div.header__mobile > div.header__btn--mob > button.header__btn--log > img`	bestref.net/images/btn-lock.png
div.header__mobile > div.header__btn--mob > button.header__btn--sign > img `div.header__mobile > div.header__btn--mob > button.header__btn--sign > img`	bestref.net/images/btn-lock.png
div.footer__bottom > div.footer__social > a > img `div.footer__bottom > div.footer__social > a > img`	bestref.net/images/footer-twitter.png
form.popup > div.form__connect > button.form__connect--facebook > img `form.popup > div.form__connect > button.form__connect--facebook > img`	bestref.net/images/popup-facebook-icon.png
form.popup > div.form__connect > button.form__connect--google > img `form.popup > div.form__connect > button.form__connect--google > img`	bestref.net/images/popup-google-icon.png
form.popup > div.form__title > a.popup__close > img `form.popup > div.form__title > a.popup__close > img`	bestref.net/images/popup-close.png
div.footer__nav--support > div.footer__nav--mainLink > a > img `div.footer__nav--support > div.footer__nav--mainLink > a > img`	bestref.net/images/new-arrow.png

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Max Potential First Input Delay 90 ms

●Use efficient cache lifetimes

●Optimize DOM size

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 1,258 KiB

●JavaScript execution time 0.1 s

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 600 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 140 ms

●Server Backend Latencies 150 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

○INP breakdown

○LCP request discovery

○User Timing marks and measures

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
BESTREF.NET (VER. 1.03) `div.footer__info > div.footer__nav > div.footer__info--site > h4.footer__nav--mainTitle`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.container > div.footer__bottom > div.footer__social > a `div.container > div.footer__bottom > div.footer__social > a`

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.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Document has a main landmark.

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA attributes are used as specified for the element's role

○Deprecated ARIA roles were not used

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted ARIA attributes

○`[role]`s have all required `[aria-*]` attributes

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○`[role]` values are valid

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
header#header > div.header__btn > button.header__btn--log > img `header#header > div.header__btn > button.header__btn--log > img`	bestref.net/images/btn-lock.png	30 x 44	30 x 44	45 x 66
form.popup > div.form__connect > button.form__connect--facebook > img `form.popup > div.form__connect > button.form__connect--facebook > img`	bestref.net/images/popup-facebook-icon.png	19 x 18	19 x 18	29 x 27
form.popup > div.form__connect > button.form__connect--google > img `form.popup > div.form__connect > button.form__connect--google > img`	bestref.net/images/popup-google-icon.png	18 x 19	18 x 19	27 x 29
form.popup > div.form__title > a.popup__close > img `form.popup > div.form__title > a.popup__close > img`	bestref.net/images/popup-close.png	11 x 11	11 x 11	17 x 17

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`