Lighthouse Desktop

· 0 checks — Desktop 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:0.133716] map[node:map[boundingRect:map[bottom:2214 height:1082 left:0 right:1350 top:1132 width:1350] lhId:page-23-DIV nodeLabel:HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV selector:div > div.row > div.text-black > div.text-black snippet:<div class="text-black row d-flex py-25 px-13"> type:node] score:0.09374 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1597 height:234 left:69 right:420 top:1363 width:351] lhId:page-2-IMG nodeLabel:div.d-flex > div.d-flex > div.d-flex > img.m-2 path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV,0,DIV,0,DIV,2,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,IMG selector:div.d-flex > div.d-flex > div.d-flex > img.m-2 snippet:<img src="/_nuxt/ancient-jewish-history.CH0rC6of.webp" class="m-2" style="box-shadow:5px 5px 0px 0px #C38D00;" data-v-63a325e7=""> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:2214 height:1082 left:0 right:1350 top:1132 width:1350] lhId:page-23-DIV nodeLabel:HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV selector:div > div.row > div.text-black > div.text-black snippet:<div class="text-black row d-flex py-25 px-13"> type:node] score:0.028952 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1597 height:234 left:69 right:420 top:1363 width:351] lhId:page-2-IMG nodeLabel:div.d-flex > div.d-flex > div.d-flex > img.m-2 path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV,0,DIV,0,DIV,2,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,IMG selector:div.d-flex > div.d-flex > div.d-flex > img.m-2 snippet:<img src="/_nuxt/ancient-jewish-history.CH0rC6of.webp" class="m-2" style="box-shadow:5px 5px 0px 0px #C38D00;" data-v-63a325e7=""> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:2214 height:1082 left:0 right:1350 top:1132 width:1350] lhId:page-23-DIV nodeLabel:HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV selector:div > div.row > div.text-black > div.text-black snippet:<div class="text-black row d-flex py-25 px-13"> type:node] score:0.011024 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1597 height:234 left:69 right:420 top:1363 width:351] lhId:page-2-IMG nodeLabel:div.d-flex > div.d-flex > div.d-flex > img.m-2 path:1,HTML,1,BODY,2,DIV,0,DIV,3,DIV,2,DIV,2,DIV,0,DIV,0,DIV,2,DIV,2,DIV,0,DIV,1,DIV,0,DIV,0,IMG selector:div.d-flex > div.d-flex > div.d-flex > img.m-2 snippet:<img src="/_nuxt/ancient-jewish-history.CH0rC6of.webp" class="m-2" style="box-shadow:5px 5px 0px 0px #C38D00;" data-v-63a325e7=""> type:node]] map[cause:Web font extra:map[type:url value:https://jewishvirtuallibrary.org/_nuxt/Roboto-Bold._ZJd4Sbe.ttf]] map[cause:Web font extra:map[type:url value:https://jewishvirtuallibrary.org/_nuxt/Gudea-Bold.hZKtxVqa.ttf]] map[cause:Web font extra:map[type:url value:https://jewishvirtuallibrary.org/_nuxt/Roboto-Regular.CN_pkOMA.ttf]] map[cause:Web font extra:map[type:url value:https://jewishvirtuallibrary.org/_nuxt/Roboto-SemiBold.EVIM0_1H.ttf]] map[cause:Web font extra:map[type:url value:https://jewishvirtuallibrary.org/_nuxt/Gudea-Regular.DzAcgoRL.ttf]]] type:subitems]]]

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
jewishvirtuallibrary.org/_nuxt/Roboto-SemiBold.EVIM0_1H.ttf	45 ms
jewishvirtuallibrary.org/_nuxt/Gudea-Regular.DzAcgoRL.ttf	45 ms
jewishvirtuallibrary.org/_nuxt/Roboto-Regular.CN_pkOMA.ttf	40 ms
jewishvirtuallibrary.org/_nuxt/Roboto-Bold._ZJd4Sbe.ttf	35 ms
jewishvirtuallibrary.org/_nuxt/Gudea-Bold.hZKtxVqa.ttf	35 ms

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:105.722 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
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/modern-jewish-history.B275WmxT.webp	352.8 KiB	339.1 KiB
Popup Image `div > div > div#image-cr089nawhnc0 > img`	/accounts/21528/uploads/pollswebinar-b22b87b59a6989e21407...	202.1 KiB	180.2 KiB
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/ancient-jewish-history.CH0rC6of.webp	134.1 KiB	120.7 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/11/1be41f9b-1f29-4b69-9a74-6ceb724e...	110.0 KiB	88.0 KiB
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/history-of-jerusalem.C77BYNka.png	81.6 KiB	68.0 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/3/6c87d582-e993-4811-9f24-1234b0b51...	79.6 KiB	53.4 KiB
swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/1/48f62870-07ac-48fe-a253-9ee4fc3f3...	74.2 KiB	52.2 KiB
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`	jewishvirtuallibrary.org/_nuxt/IsraelFlag.DqZRK-Do.jpeg	63.0 KiB	49.1 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/7/f848b9d2-13d0-4e83-a1eb-851805e8a...	66.9 KiB	41.3 KiB
div#header > div.px-14 > div.col > img.logo `div#header > div.px-14 > div.col > img.logo`	jewishvirtuallibrary.org/_nuxt/jvl-logo-white.BD6jMrbI.png	40.8 KiB	40.3 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/5/41d3ba5f-a76a-4f5a-aa24-f5568839b...	60.6 KiB	38.7 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/13/17e59cc1-7d9c-4d9f-9e90-1d843ccd...	55.0 KiB	36.7 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/12/b3f3c705-2e4e-4b0e-9ff6-a05bcc99...	58.3 KiB	36.4 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/15/50cc2757-2bcf-491f-a136-0ea1bc3b...	53.3 KiB	33.4 KiB
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`	jewishvirtuallibrary.org/_nuxt/world-map.LtxKRr9f.jpg	42.6 KiB	33.2 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/10/27418e5a-1536-4f97-b368-fac9fc9d...	32.1 KiB	27.6 KiB
swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/2/836f5307-d9ee-403c-878f-d91a63611...	30.3 KiB	19.9 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/9/53f4f324-9f62-41af-8df1-b514d5155...	46.0 KiB	19.9 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/8/ca81734c-3360-43ca-80c8-a74187507...	36.1 KiB	12.9 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/4/828ad928-ac83-4c47-a2d9-45a61c19a...	26.3 KiB	9.9 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/6/21253a63-85b7-4307-ba3b-167566e87...	22.1 KiB	7.9 KiB
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`	/storage/uploads/wing/14/85c365b9-f034-453b-977d-535b9cc6...	15.7 KiB	5.7 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-22-DIV

nodeLabel: Library Wings About Bookstore Glossary Links Publications Timelines Virtual Tou…

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

selector: body > div#__nuxt > div > div#header

snippet: <div id="header" class="header bg-white text-white gap-7 row col s12 z-10" data-v-f80de7ef="">

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

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.

URL	Transfer Size	Duration
fonts.googleapis.com/icon?family=Material+Icons	817 B	270 ms
cmp.gatekeeperconsent.com/min.js	854 B	257 ms
the.gatekeeperconsent.com/cmp.min.js	3.0 KiB	275 ms
jewishvirtuallibrary.org/_nuxt/entry.C6JJf5oE.css	110.2 KiB	673 ms
jewishvirtuallibrary.org/_nuxt/BottomAds.BHAten-p.css	588 B	177 ms
jewishvirtuallibrary.org/_nuxt/index.BQTXiVwi.css	1.4 KiB	177 ms
jewishvirtuallibrary.org/_nuxt/SearchInput.DNhX8R94.css	883 B	177 ms
jewishvirtuallibrary.org/_nuxt/Modal.BCP-SsRE.css	846 B	177 ms
jewishvirtuallibrary.org/_nuxt/default.D9uVWmON.css	1.9 KiB	177 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css	19.1 KiB	344 ms

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.

Request	Cache TTL	Transfer Size
www.ezojs.com/identity.js	900.0 s	101.7 KiB
www.ezojs.com/ezoic/sa.min.js	600.0 s	65.8 KiB
go.ezodn.com/ezoic/ezorca.min.js	14400.0 s	74.3 KiB
static.ctctcdn.com/js/signup-form-widget/current/signup-form-widget.min.js	900.0 s	37.2 KiB
cdn.id5-sync.com/api/1.0/id5-api.js	3600.0 s	34.4 KiB
/accounts/21528/uploads/pollswebinar-b22b87b59a6989e21407...	1209600.0 s	203.0 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...	14400.0 s	12.3 KiB
cdn.popupsmart.com/uploaded/df75579e750a8914435fe976c4a24fda.jpeg	1209600.0 s	79.0 KiB
static.ctctcdn.com/js/signup-form-widget/current/signup-form-widget.css	900.0 s	5.7 KiB
cdn.popupsmart.com/uploaded/f6323896112abba738f0b5339d195f61.png	1209600.0 s	45.0 KiB
cdn.popupsmart.com/uploaded/c742c2a17d1ae14429efe5a97edebd41.png	1209600.0 s	36.9 KiB
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...	2865.0 s	3.9 KiB
the.gatekeeperconsent.com/cmp.min.js	300.0 s	3.0 KiB
cdn.popupsmart.com/uploaded/6cfed2455a4615d599e69c1ca3cbc3d7.jpeg	1209600.0 s	13.6 KiB
cmp.gatekeeperconsent.com/min.js	0.0 ms	854 B
cdn.popupsmart.com/uploaded/f81012b28668e613ce9719390e694fc0.png	1209600.0 s	6.8 KiB
cdn.popupsmart.com/assets/empty.png	1209600.0 s	6.8 KiB
rules.quantcount.com/rules-p-31iz6hfFutd16.js	3600.0 s	634 B

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

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
HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… `div > div.row > div.text-black > div.text-black`	0.094
HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… `div > div.row > div.text-black > div.text-black`	0.029
HISTORICAL TIMELINES Discover key moments in Jewish history, from ancient times… `div > div.row > div.text-black > div.text-black`	0.011

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.

Estimated savings: 100 ms 137.2 KiB

URL	Transfer Size	Est Savings
jewishvirtuallibrary.org/_nuxt/entry.C6JJf5oE.css	109.8 KiB	108.6 KiB
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css	18.4 KiB	18.4 KiB
cdn.popupsmart.com/accounts/21528/218978/22/main.css	10.4 KiB	10.2 KiB

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: 160 ms 1.4 MiB

URL	Transfer Size	Est Savings
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.8 KiB	162.6 KiB
cdn.popupsmart.com/accounts/21528/218978/22/main.js	215.9 KiB	156.5 KiB
cdn.popupsmart.com/accounts/21528/9928/14/main.js	190.2 KiB	138.9 KiB
cdn.popupsmart.com/accounts/21528/166618/8/main.js	189.7 KiB	136.3 KiB
cdn.popupsmart.com/accounts/21528/7495/21/main.js	190.6 KiB	136.3 KiB
cdn.popupsmart.com/accounts/21528/7337/21/main.js	190.9 KiB	132.8 KiB
www.googletagmanager.com/gtag/js?id=G-PPRBG64R7T&cx=c&gtm=4e64k1h2	174.6 KiB	76.9 KiB
jewishvirtuallibrary.org/_nuxt/C7KtkeID.js	148.7 KiB	76.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-MRW3HCKV	143.1 KiB	65.7 KiB
www.googletagmanager.com/gtag/js?id=UA-90790627-1	124.9 KiB	60.6 KiB
jewishvirtuallibrary.org/_nuxt/BAIthYij.js	104.4 KiB	58.9 KiB
www.ezojs.com/identity.js	101.2 KiB	51.5 KiB
go.ezodn.com/porpoiseant/ezadloadrewarded.js?cb=1048&gcb=195-1	62.5 KiB	41.1 KiB
jewishvirtuallibrary.org/_nuxt/CJr9Iqje.js	75.6 KiB	34.5 KiB
static.ctctcdn.com/js/signup-form-widget/current/signup-form-widget.min.js	36.7 KiB	34.0 KiB
www.ezojs.com/ezoic/sa.min.js	65.3 KiB	32.5 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
Unattributable	604 ms	68 ms	0.0 ms
jewishvirtuallibrary.org/	557 ms	34 ms	7.9 ms
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...	422 ms	396 ms	5.6 ms
jewishvirtuallibrary.org/_nuxt/BAIthYij.js	394 ms	111 ms	0.2 ms
jewishvirtuallibrary.org/porpoiseant/jellyfish.js?a=a&cb=21&dcb=195-1&shcb=34	256 ms	232 ms	12 ms
jewishvirtuallibrary.org/_nuxt/CrUIaL8u.js	166 ms	161 ms	0.2 ms
jewishvirtuallibrary.org/cdn-cgi/challenge-platform/scripts/jsd/main.js	160 ms	152 ms	2.9 ms
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	103 ms	66 ms	29 ms
www.googletagmanager.com/gtag/js?id=G-PPRBG64R7T&cx=c&gtm=4e64k1h2	77 ms	59 ms	17 ms
www.ezojs.com/identity.js	73 ms	52 ms	11 ms
www.googletagmanager.com/gtag/js?id=UA-90790627-1	66 ms	50 ms	16 ms
www.googletagmanager.com/gtm.js?id=GTM-MRW3HCKV	60 ms	46 ms	13 ms

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
Script Evaluation	1.7 s
Other	892 ms
Style & Layout	401 ms
Script Parsing & Compilation	195 ms
Rendering	103 ms
Parse HTML & CSS	71 ms
Garbage Collection	39 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
The page has an unload handler in the main frame.	Actionable
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/_nuxt/vecteezy_the-great-synagogue-of-budapest-hungary_1...	1.3 MiB
jewishvirtuallibrary.org/_nuxt/Iran-Jews.BhnSQeFI.jpg	834.1 KiB
/_nuxt/vecteezy_overview-of-the-western-wall-in-jerusalem...	815.4 KiB
jewishvirtuallibrary.org/_nuxt/header-bg.CVNV2ZZK.jpg	774.9 KiB
jewishvirtuallibrary.org/_nuxt/Yemen_Jews_Rosh_Ha-Ayin-scaled.NgUQ3Vq5.jpg	585.7 KiB
/_nuxt/Rabbi_Menachem_Mendel_Schneerson-scaled.DiWa-9HO.jpg	478.3 KiB
jewishvirtuallibrary.org/_nuxt/library2.C-wS2LwI.jpg	457.5 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.9 KiB
jewishvirtuallibrary.org/_nuxt/modern-jewish-history.B275WmxT.webp	353.3 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
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	jewishvirtuallibrary.org/_nuxt/Yemen_Jews_Rosh_Ha-Ayin-scaled.NgUQ3Vq5.jpg
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	/_nuxt/Rabbi_Menachem_Mendel_Schneerson-scaled.DiWa-9HO.jpg
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	/_nuxt/vecteezy_the-great-synagogue-of-budapest-hungary_1...
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	/_nuxt/vecteezy_overview-of-the-western-wall-in-jerusalem...
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	jewishvirtuallibrary.org/_nuxt/Iran-Jews.BhnSQeFI.jpg
div#header > div.px-14 > div.col > img.logo `div#header > div.px-14 > div.col > img.logo`	jewishvirtuallibrary.org/_nuxt/jvl-logo-white.BD6jMrbI.png
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/modern-jewish-history.B275WmxT.webp
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	jewishvirtuallibrary.org/_nuxt/monkmap-1.BOODmNVO.png
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	jewishvirtuallibrary.org/_nuxt/Palmach.Bu6Hzfl3.png
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`	jewishvirtuallibrary.org/_nuxt/IsraelFlag.DqZRK-Do.jpeg
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`	jewishvirtuallibrary.org/_nuxt/world-map.LtxKRr9f.jpg
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`	jewishvirtuallibrary.org/_nuxt/maghensyn_Lebanon.xZZoohKh.png
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/ancient-jewish-history.CH0rC6of.webp
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`	jewishvirtuallibrary.org/_nuxt/history-of-jerusalem.C77BYNka.png

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

●Max Potential First Input Delay 110 ms

●Document request latency

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoid long main-thread tasks 7 long tasks found

●Network Requests

●Network Round Trip Times 120 ms

●Server Backend Latencies 200 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 530 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
EXPLORE `div.d-flex > div.justify-content-start > div.border > span.fs-16`
EXPLORE `div.d-flex > div.justify-content-start > div.border > span.fs-16`
EXPLORE `div.d-flex > div.justify-content-start > div.border > span.fs-16`

These are opportunities to improve the legibility of your content.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These are opportunities to improve the interpretation of your content by users in different locales.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#header > div.px-14 > div.col > img.logo `div#header > div.px-14 > div.col > img.logo`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`

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.px-14 > div.d-flex > div.d-flex > a.router-link-active `div.px-14 > div.d-flex > div.d-flex > a.router-link-active`
div.px-14 > div.d-flex > div.d-flex > a.router-link-active `div.px-14 > div.d-flex > div.d-flex > a.router-link-active`
div.px-14 > div.d-flex > div.d-flex > a.router-link-active `div.px-14 > div.d-flex > div.d-flex > a.router-link-active`
div.px-14 > div.d-flex > div.d-flex > a.router-link-active `div.px-14 > div.d-flex > div.d-flex > a.router-link-active`
div.px-14 > div.d-flex > div.d-flex > a.router-link-active `div.px-14 > div.d-flex > div.d-flex > a.router-link-active`
div.col > div.d-flex > div.d-flex > a.router-link-active `div.col > div.d-flex > div.d-flex > a.router-link-active`
div.col > div.d-flex > div.d-flex > a.router-link-active `div.col > div.d-flex > div.d-flex > a.router-link-active`
div.col > div.d-flex > div.d-flex > a.router-link-active `div.col > div.d-flex > div.d-flex > a.router-link-active`
div.col > div.d-flex > div.d-flex > a.router-link-active `div.col > div.d-flex > div.d-flex > a.router-link-active`
div.col > div.d-flex > div.d-flex > a.router-link-active `div.col > div.d-flex > div.d-flex > a.router-link-active`

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.

Best practices

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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

●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.

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

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

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

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

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

○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

○ARIA IDs are unique

○No form fields have multiple labels

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

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

○`<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

○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

○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

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Unload event listeners are deprecated and will be removed.	/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...
SharedStorage	jewishvirtuallibrary.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	jewishvirtuallibrary.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	jewishvirtuallibrary.org/cdn-cgi/challenge-platform/scripts/jsd/main.js

●Uses HTTPS

●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 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

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.

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
Library Wings `div#header > div.px-14 > div.d-flex > a.position-relative`
About `div#header > div.px-14 > div.d-flex > a.position-relative`
Bookstore `div#header > div.px-14 > div.d-flex > a.position-relative`
Glossary `div#header > div.px-14 > div.d-flex > a.position-relative`
Links `div#header > div.px-14 > div.d-flex > a.position-relative`
Publications `div#header > div.px-14 > div.d-flex > a.position-relative`
Timelines `div#header > div.px-14 > div.d-flex > a.position-relative`
Virtual Tours `div#header > div.px-14 > div.d-flex > a.position-relative`

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

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#header > div.px-14 > div.col > img.logo `div#header > div.px-14 > div.col > img.logo`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full `div.col > swiper-container.slide-container > swiper-slide#slide > img.w-full`
swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-active > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide.swiper-slide-next > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover `swiper-slide > a.cursor-pointer > div.border-solid > img.object-cover`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.d-flex > img.m-2 `div.d-flex > div.d-flex > div.d-flex > img.m-2`
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`
div.d-flex > div.d-flex > div.col > img.p-8 `div.d-flex > div.d-flex > div.col > img.p-8`

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

○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

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`