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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

62

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.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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:34.873 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.

URLResource SizeEst Savings
The bestselling author on her new novel, family bonds, and kinship. div.inspired-block > div.inspired-card > a.inspired-link > img.inspired-block-image
/wp-content/uploads/2026/03/12152247/1200x628-PRH-Tayari-...308.1 KiB272.2 KiB
Four book covers; One & Only, The Exes, Kin, The Secret Lives of Murderers' Wiv… div.cb_image > div.cb_sngl_img > a > img.link_cntnt
/wp-content/uploads/2025/05/31094513/2026_Book_Club_HP_12...229.1 KiB184.8 KiB
Four book covers; Weavingshaw, Mother of Strangers, What Strange Paradise, The … div.cb_image > div.cb_sngl_img > a > img.link_cntnt
/wp-content/uploads/2025/04/24142310/PRH_ArabAmericanHeri...179.9 KiB135.6 KiB
Grab these sweet spring stories for your little ones. div.inspired-block > div.inspired-card > a.inspired-link > img.inspired-block-image
/wp-content/uploads/2026/03/11113719/Kids-Trending-Baby-A...119.5 KiB84.6 KiB
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/978052556423272.3 KiB55.0 KiB
Mystery & Suspense section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-mystery-suspense.png37.1 KiB26.0 KiB
New Releases section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-new-releases.png36.3 KiB25.2 KiB
Sci-Fi & Fantasy section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-science-fiction-fantasy.png35.7 KiB24.6 KiB
Best Sellers section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-best-sellers.png34.4 KiB23.3 KiB
Romance section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-romance.png30.0 KiB18.9 KiB
History section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-history.png28.3 KiB17.2 KiB
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/978059380421633.5 KiB16.9 KiB
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/978052594959631.6 KiB15.1 KiB
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/978067975447330.7 KiB13.4 KiB
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/978030795047529.9 KiB12.6 KiB
Literary Fiction section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-literary-fiction.png21.9 KiB10.8 KiB
Women's Fiction section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-womens-fiction.png20.5 KiB9.4 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-2-IMG
nodeLabel: Four book covers; Weavingshaw, Mother of Strangers, What Strange Paradise, The …
path: 4,HTML,2,BODY,11,DIV,4,MAIN,2,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,A,0,IMG
selector: div.cb_image > div.cb_sngl_img > a > img.link_cntnt
snippet: <img decoding="async" src="https://assets.penguinrandomhouse.com/wp-content/uploads/2025/04/24142310/…" alt="Four book covers; Weavingshaw, Mother of Strangers, What Strange Paradise,…" class="link_cntnt">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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.

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.0 s

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

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

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.

CategoryTime Spent
Script Evaluation863 ms
Other712 ms
Style & Layout414 ms
Script Parsing & Compilation203 ms
Parse HTML & CSS143 ms
Rendering104 ms

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
Four book covers; Weavingshaw, Mother of Strangers, What Strange Paradise, The … div.cb_image > div.cb_sngl_img > a > img.link_cntnt
/wp-content/uploads/2025/04/24142310/PRH_ArabAmericanHeri...
The bestselling author on her new novel, family bonds, and kinship. div.inspired-block > div.inspired-card > a.inspired-link > img.inspired-block-image
/wp-content/uploads/2026/03/12152247/1200x628-PRH-Tayari-...
Grab these sweet spring stories for your little ones. div.inspired-block > div.inspired-card > a.inspired-link > img.inspired-block-image
/wp-content/uploads/2026/03/11113719/Kids-Trending-Baby-A...
Four book covers; One & Only, The Exes, Kin, The Secret Lives of Murderers' Wiv… div.cb_image > div.cb_sngl_img > a > img.link_cntnt
/wp-content/uploads/2025/05/31094513/2026_Book_Club_HP_12...
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/9780525949596
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/9780593804216
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/9780525564232
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/9780307950475
Book cover div.slick-track > div.carousel-element > div.book-cover > img
images.penguinrandomhouse.com/cover/9780679754473
New Releases section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-new-releases.png
Best Sellers section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-best-sellers.png
Mystery & Suspense section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-mystery-suspense.png
Romance section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-romance.png
Sci-Fi & Fantasy section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-science-fiction-fantasy.png
Literary Fiction section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-literary-fiction.png
History section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-history.png
Women's Fiction section.inner-facade > div.category > div.image-wrap > img
assets.penguinrandomhouse.com/category-images/triad-womens-fiction.png
Today's Top Books div.slick-list > div.slick-track > div.carousel-element > img
/wp-content/themes/penguinrandomhouse/images/PRH_TodaysTo...
1 div.slick-track > div.carousel-element > div.book-int > img
/wp-content/themes/penguinrandomhouse/images/hp_ttb1.svg
2 div.slick-track > div.carousel-element > div.book-int > img
/wp-content/themes/penguinrandomhouse/images/hp_ttb2.svg
3 div.slick-track > div.carousel-element > div.book-int > img
/wp-content/themes/penguinrandomhouse/images/hp_ttb3.svg
4 div.slick-track > div.carousel-element > div.book-int > img
/wp-content/themes/penguinrandomhouse/images/hp_ttb4.svg
5 div.slick-track > div.carousel-element > div.book-int > img
/wp-content/themes/penguinrandomhouse/images/hp_ttb5.svg
div.slick-track > div.carousel-element > div.quick-view > img div.slick-track > div.carousel-element > div.quick-view > img
/wp-content/themes/penguinrandomhouse/images/plus-icon-11...
div.slick-track > div.carousel-element > div.quick-view > img div.slick-track > div.carousel-element > div.quick-view > img
/wp-content/themes/penguinrandomhouse/images/plus-icon-11...
div.slick-track > div.carousel-element > div.quick-view > img div.slick-track > div.carousel-element > div.quick-view > img
/wp-content/themes/penguinrandomhouse/images/plus-icon-11...
div.slick-track > div.carousel-element > div.quick-view > img div.slick-track > div.carousel-element > div.quick-view > img
/wp-content/themes/penguinrandomhouse/images/plus-icon-11...
div.slick-track > div.carousel-element > div.quick-view > img div.slick-track > div.carousel-element > div.quick-view > img
/wp-content/themes/penguinrandomhouse/images/plus-icon-11...
Raise kids who love to read div.container > div.footer-bttm-links > a.footer-bttm-link > img.lazyload
Out of Print div.container > div.footer-bttm-links > a.footer-bttm-link > img.lazyload
An online magazine for today’s home cook div.container > div.footer-bttm-links > a.footer-bttm-link > img.lazyload
Today's Top Books div.container > div.footer-bttm-links > a.footer-bttm-link > img.lazyload
Wonderbly div.container > div.footer-bttm-links > a.footer-bttm-link > img.lazyload

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

●Max Potential First Input Delay 100 ms
●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●JavaScript execution time 0.9 s
●Avoid long main-thread tasks 11 long tasks found
●Avoid non-composited animations 6 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 20 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
○INP breakdown
○User Timing marks and measures
○Avoid large layout shifts
96

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

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Cookies and Similar Technologies We, our affiliates, and our providers use coo… body.wp-singular > div#__tealiumGDPRecModal > div#prh_privacy_prompt
Read More div#prh_privacy_prompt > div.privacy_prompt_content > p#prh_pp_copy > span#strt_inx
I Decline All Cookies div#__tealiumGDPRecModal > div#prh_privacy_prompt > div.privacy_prompt_footer > div#consent_prompt_decline
I Agree div#__tealiumGDPRecModal > div#prh_privacy_prompt > div.privacy_prompt_footer > div#consent_prompt_submit
✕ body.wp-singular > div#__tealiumGDPRecModal > div#prh_privacy_prompt > div#prh_mdl_close

These are opportunities to improve keyboard navigation in your application.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Brightly Raise kids who love to read main#mainblock > div.container > div.footer-bttm-links > a.footer-bttm-link
Out of Print Shirts, totes, socks, and more for book lovers main#mainblock > div.container > div.footer-bttm-links > a.footer-bttm-link
TASTE An online magazine for today’s home cook main#mainblock > div.container > div.footer-bttm-links > a.footer-bttm-link
Today's Top Books Want to know what people are actually reading right now? main#mainblock > div.container > div.footer-bttm-links > a.footer-bttm-link
Wonderbly Personalized books for kids and adults main#mainblock > div.container > div.footer-bttm-links > a.footer-bttm-link
○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-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●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 have a discernible name
●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.
●Heading elements appear in a sequentially-descending order
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○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
○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
○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
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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.
○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.
100

Best Practices

●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
●Serves images with appropriate resolution
●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 DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
85

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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Format your HTML in a way that enables crawlers to better understand your app’s content.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
search header#main-header > div.desktop > nav#main-nav > a.search-icon-link
search div.condensed > div#condensed-container-row > div#account-container > a.search-icon-link
close search div.search-form-div > form#seachformglobal > div.search-controls > a.mobile-close-search
close search div#dt_search > div#search_box_element > div.search-container > a.close-search

To appear in search results, crawlers need access to your app.

○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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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