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.

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.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	0.0 ms	694.6 KiB
www.oclc.org/etc.clientlibs/clientlibs/social/thirdparty/ckeditor.min.js	0.0 ms	232.5 KiB
/content/dam/oclc/design-images/home-page/us-en/bg_homepa...	86400.0 s	368.7 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	0.0 ms	131.9 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	86400.0 s	298.1 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	86400.0 s	257.5 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/oclc-main-v2/main.css?v=20260326	0.0 ms	75.4 KiB
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.js	0.0 ms	69.5 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.js	0.0 ms	68.1 KiB
static.cloud.coveo.com/headless/v3.49.3/headless.esm.js	86400.0 s	169.5 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	86400.0 s	157.8 KiB
cdn.cookielaw.org/scripttemplates/202505.1.0/otBannerSdk.js	86400.0 s	118.8 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	86400.0 s	108.6 KiB
/etc.clientlibs/settings/wcm/designs/oclc/clientlibs/clie...	0.0 ms	34.2 KiB
/etc.clientlibs/settings/wcm/designs/oclc/clientlibs/clie...	0.0 ms	33.5 KiB
/etc.clientlibs/settings/wcm/designs/oclc/clientlibs/clie...	0.0 ms	33.4 KiB
/etc.clientlibs/settings/wcm/designs/oclc/clientlibs/clie...	0.0 ms	32.3 KiB
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js	0.0 ms	31.7 KiB
/etc.clientlibs/settings/wcm/designs/oclc/clientlibs/clie...	0.0 ms	30.6 KiB
/dcdn/settings.js?a=743027&settings_type=4&ts=1776790939&...	1800.0 s	27.1 KiB
/etc.clientlibs/cq/personalization/clientlib/personalizat...	0.0 ms	21.4 KiB
static.cloud.coveo.com/atomic/v3/npm.dayjs-2661949a.js	86400.0 s	41.7 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shCore.js	0.0 ms	15.8 KiB
www.oclc.org/content/dam/fonts/647829/1F3891204C471A63E.css	86400.0 s	36.8 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/mainnavigation-functions-v0.3.js	0.0 ms	13.6 KiB
/content/marketing/publish/en_us/home/jcr:content/par/par...	86400.0 s	26.3 KiB
/content/dam/oclc/design-images/home-page/us-en/bg_homepa...	86400.0 s	24.2 KiB
/content/marketing/publish/en_us/home/jcr:content/par/par...	86400.0 s	24.2 KiB
/content/marketing/publish/en_us/home/jcr:content/par/par...	86400.0 s	22.2 KiB
www.oclc.org/etc.clientlibs/cq/personalization/clientlib/underscore.min.js	0.0 ms	7.3 KiB
www.oclc.org/etc.clientlibs/foundation/clientlibs/shared.min.js	0.0 ms	7.2 KiB
static.cloud.coveo.com/atomic/v3/npm.stencil.core-8fca3e3f.js	86400.0 s	15.7 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/jquery/jquery.easing.js	0.0 ms	5.9 KiB
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/modernizr.min.js	0.0 ms	5.7 KiB
static.cloud.coveo.com/atomic/v3/npm.i18next-d6a6a4c8.js	86400.0 s	13.5 KiB
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.css	0.0 ms	5.3 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.css	0.0 ms	5.3 KiB
static.cloud.coveo.com/atomic/v3/6434-44bc1970.js	86400.0 s	12.8 KiB
static.cloud.coveo.com/atomic/v3/6610-0d18ce17.js	86400.0 s	9.8 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
www.oclc.org/etc.clientlibs/clientlibs/granite/utils.min.js	0.0 ms	3.5 KiB
static.cloud.coveo.com/atomic/v3/npm.dompurify-cb662fe9.js	86400.0 s	8.8 KiB
www.oclc.org/etc.clientlibs/foundation/clientlibs/jquery-ui.min.js	0.0 ms	3.4 KiB
static.cloud.coveo.com/atomic/v3/9472.js	86400.0 s	8.4 KiB
www.oclc.org/apps/oclc/components/content/search/clientlib.min.js	0.0 ms	2.8 KiB
/content/dam/oclc/annual-report/2018/images/cooperation/W...	0.0 ms	2.7 KiB
static.cloud.coveo.com/atomic/v3/npm.lit-html-d7b4bddb.js	86400.0 s	6.6 KiB
extend.vimeocdn.com/ga/32388854.js	86400.0 s	5.8 KiB
www.oclc.org/content/dam/oclc/design-images/navigation-logo.svg	0.0 ms	2.2 KiB
static.cloud.coveo.com/atomic/v3/atomic.esm.js	86400.0 s	5.4 KiB
static.cloud.coveo.com/atomic/v3/2296-1b61a269.js	86400.0 s	4.9 KiB
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery/granite.min.js	0.0 ms	1.7 KiB
static.cloud.coveo.com/atomic/v3/8166-21d88a1e.js	86400.0 s	4.2 KiB
static.cloud.coveo.com/atomic/v3/npm.lit.reactive-element-ecdee09e.js	86400.0 s	3.9 KiB
www.oclc.org/content/dam/oclc/homepage/css/homepages_all.css	86400.0 s	3.8 KiB
www.oclc.org/content/dam/oclc/logos/next-blog-logo.png	86400.0 s	3.8 KiB
static.cloud.coveo.com/atomic/v3/6821-72759f9f.js	86400.0 s	3.7 KiB
static.cloud.coveo.com/atomic/v3/npm.i18next-http-backend-7de46954.js	86400.0 s	3.6 KiB
/apps/settings/wcm/designs/oclc/js/jquery/jquery.hoverInt...	0.0 ms	1.4 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shAutoloader.js	0.0 ms	1.4 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shCore.css	0.0 ms	1.3 KiB
www.oclc.org/apps/oclc/components/page/oclcbase/ggclientlibs.min.js	0.0 ms	1.3 KiB
static.cloud.coveo.com/atomic/v3/6177-8c8f2aaf.js	86400.0 s	3.0 KiB
static.cloud.coveo.com/bueno/v1.1.9/bueno.esm.js	86400.0 s	2.8 KiB
static.cloud.coveo.com/atomic/v3/6577-1eb70d3c.js	86400.0 s	2.4 KiB
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery/animation.min.js	0.0 ms	957 B
static.cloud.coveo.com/atomic/v3/index.esm.js	86400.0 s	2.3 KiB
/content/dam/common/images/social-icons/svg/social_icon_i...	0.0 ms	856 B
www.oclc.org/apps/settings/wcm/designs/oclc/js/jquery/jquery.url.min.js	0.0 ms	856 B
static.cloud.coveo.com/atomic/v3/npm.lit.context-859a4546.js	86400.0 s	2.0 KiB
static.cloud.coveo.com/atomic/v3/3558-dacebbe8.js	86400.0 s	1.9 KiB
static.cloud.coveo.com/atomic/v3/9306-ce7cb8c0.js	86400.0 s	1.9 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shThemeDefault.css	0.0 ms	750 B
static.cloud.coveo.com/atomic/v3/3504-68fc865d.js	86400.0 s	1.8 KiB
static.cloud.coveo.com/atomic/v3/5254-d6af3c5b.js	86400.0 s	1.7 KiB
/apps/settings/wcm/designs/oclc/js/jquery/jquery.ba-outsi...	0.0 ms	714 B
static.cloud.coveo.com/atomic/v3/7387-013bfabb.js	86400.0 s	1.6 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/images/icon-language.svg	0.0 ms	628 B
static.cloud.coveo.com/atomic/v3/3262-a86c80d6.js	86400.0 s	1.5 KiB
static.cloud.coveo.com/atomic/v3/754-e48bf9e8.js	86400.0 s	1.5 KiB
static.cloud.coveo.com/atomic/v3/npm.lit-1137af03.js	86400.0 s	1.4 KiB
static.cloud.coveo.com/atomic/v3/9075-56f53a01.js	86400.0 s	1.4 KiB
static.cloud.coveo.com/atomic/v3/290-bbb2d2f0.js	86400.0 s	1.4 KiB
static.cloud.coveo.com/atomic/v3/4538-d5669658.js	86400.0 s	1.4 KiB
static.cloud.coveo.com/atomic/v3/7123-5a10a787.js	86400.0 s	1.4 KiB
static.cloud.coveo.com/atomic/v3/5404-5d2daeea.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/2473-ad78dda0.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/9484-af4ac7db.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/9783-722e1341.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/6417.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/9508-f12ee769.js	86400.0 s	1.3 KiB
static.cloud.coveo.com/atomic/v3/4507-a4b80994.js	86400.0 s	1.3 KiB
/content/dam/common/images/social-icons/svg/social_icon_l...	0.0 ms	507 B
static.cloud.coveo.com/atomic/v3/8629-10155bb6.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/6292-79f209d7.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/8635-6bd159f6.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/9609-23cf2299.js	86400.0 s	1.2 KiB
/apps/settings/wcm/designs/oclc/js/jquery/jquery.ba-outsi...	0.0 ms	500 B
static.cloud.coveo.com/atomic/v3/3178-ce4d4ae9.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/423-fe249455.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/2915-ba058724.js	86400.0 s	1.2 KiB
static.cloud.coveo.com/atomic/v3/7864-a63c67e1.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/npm.tslib-326a4433.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/786-fe3f9fec.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/npm.lit-element-1b382089.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/themes/coveo.css	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/3004-5ce7ce86.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/8646-9b898fcd.js	86400.0 s	1.1 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/toggle-show-hide.js	0.0 ms	437 B
static.cloud.coveo.com/atomic/v3/7488-88241f95.js	86400.0 s	1.1 KiB
static.cloud.coveo.com/atomic/v3/3074-89fa3a71.js	86400.0 s	1.0 KiB
static.cloud.coveo.com/atomic/v3/7581-09f7f911.js	86400.0 s	1.0 KiB
static.cloud.coveo.com/atomic/v3/7189-d38e0748.js	86400.0 s	1.0 KiB
/content/dam/common/images/social-icons/svg/social_icon_y...	0.0 ms	418 B
static.cloud.coveo.com/atomic/v3/9004-569fbf08.js	86400.0 s	1.0 KiB
static.cloud.coveo.com/atomic/v3/4722-107731ad.js	86400.0 s	1.0 KiB
/content/dam/common/images/social-icons/svg/social_icon_f...	0.0 ms	411 B
static.cloud.coveo.com/atomic/v3/4847-63ad5dcf.js	86400.0 s	1014 B
static.cloud.coveo.com/atomic/v3/1887-33eb7ca5.js	86400.0 s	993 B
static.cloud.coveo.com/atomic/v3/5471-729f8295.js	86400.0 s	983 B
static.cloud.coveo.com/atomic/v3/2013-87a31d6e.js	86400.0 s	963 B
static.cloud.coveo.com/atomic/v3/9325-c4cc5715.js	86400.0 s	951 B
static.cloud.coveo.com/atomic/v3/9545-95e2d841.js	86400.0 s	936 B
static.cloud.coveo.com/atomic/v3/4049-a72fbf35.js	86400.0 s	909 B
www.oclc.org/apps/settings/wcm/designs/oclc/images/icon-search.svg	0.0 ms	356 B
static.cloud.coveo.com/atomic/v3/9758-c35bafd9.js	86400.0 s	875 B
static.cloud.coveo.com/atomic/v3/3205-42694558.js	86400.0 s	836 B
static.cloud.coveo.com/atomic/v3/7125.js	86400.0 s	827 B
static.cloud.coveo.com/atomic/v3/3924-6ce060f2.js	86400.0 s	825 B
www.oclc.org/apps/settings/wcm/designs/oclc/js/en-US.js	0.0 ms	304 B
static.cloud.coveo.com/atomic/v3/9253-7f58ae51.js	86400.0 s	725 B
static.cloud.coveo.com/atomic/v3/4381-dd1cce47.js	86400.0 s	719 B
www.oclc.org/apps/settings/wcm/designs/oclc/images/icon-menu.svg	0.0 ms	276 B
www.oclc.org/content/dam/common/css/oclc-fonts.css	86400.0 s	678 B
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery/oclc.min.js	0.0 ms	200 B
www.oclc.org/etc.clientlibs/foundation/clientlibs/jquery.min.js	0.0 ms	114 B
/v.gif?cd=0&a=743027&d=oclc.org&u=D11FF457278D9A9A893DADD...	43200.0 s	147 B
/p.css?s=1&k=xyd8noe&ht=tk&f=4648.4649.4650.2030.2032&a=5...	604800.0 s	172 B
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	0.0 ms	0 B
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shCore.js	0.0 ms	0 B
www.oclc.org/apps/settings/wcm/designs/oclc/js/mainnavigation-functions-v0.3.js	0.0 ms	0 B
www.oclc.org/apps/settings/wcm/designs/oclc/js/jquery/jquery.easing.js	0.0 ms	0 B
/apps/settings/wcm/designs/oclc/js/jquery/jquery.hoverInt...	0.0 ms	0 B
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shAutoloader.js	0.0 ms	0 B
/apps/settings/wcm/designs/oclc/js/jquery/jquery.ba-outsi...	0.0 ms	0 B

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.

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
Link your library Use OCLC Meridian® to create linked data and unlock the hidd… `div.parsys_column > div.col1 > div.parsyscolumncontrol > div#meridian`	/content/dam/oclc/design-images/home-page/us-en/bg_homepa...	368.1 KiB	268.5 KiB
Photo: Librarian taking an online WebJunction course `div.col0 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...	297.6 KiB	240.3 KiB
Photo: Woman using laptop on home patio `div.col1 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...	257.0 KiB	199.6 KiB
Photos: People reading e-content on laptops and tablets `div.col0 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...	157.5 KiB	100.1 KiB
Photo: WMS on laptop in library setting `div.col1 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...	108.4 KiB	50.9 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:1852.362 label:Time to first byte subpart:timeToFirstByte] map[duration:2927.323 label:Resource load delay subpart:resourceLoadDelay] map[duration:801.852 label:Resource load duration subpart:resourceLoadDuration] map[duration:788.218 label:Element render delay subpart:elementRenderDelay]]

lhId: page-5-DIV

nodeLabel: Metadata evolution Expand influence and reach with linked data through our inf…

path: 2,HTML,2,BODY,8,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV

selector: div.parsys_column > div.col0 > div.parsyscolumncontrol > div#linkeddata

snippet: <div class="parsys_column cq-colctrl-default" id="linkeddata">

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-5-DIV

nodeLabel: Metadata evolution Expand influence and reach with linked data through our inf…

path: 2,HTML,2,BODY,8,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV

selector: div.parsys_column > div.col0 > div.parsyscolumncontrol > div#linkeddata

snippet: <div class="parsys_column cq-colctrl-default" id="linkeddata">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

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
www.oclc.org/etc.clientlibs/clientlibs/social/thirdparty/ckeditor.min.js	232.5 KiB	1.2 s
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.9 KiB	754 ms
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.js	69.5 KiB	453 ms
www.oclc.org/apps/settings/wcm/designs/oclc/oclc-main-v2/main.css?v=20260326	75.4 KiB	1.5 s
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.js	68.1 KiB	453 ms
/etc.clientlibs/cq/personalization/clientlib/personalizat...	21.4 KiB	151 ms
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js	31.7 KiB	151 ms
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/modernizr.min.js	5.7 KiB
www.oclc.org/etc.clientlibs/cq/personalization/clientlib/underscore.min.js	7.3 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/en-US.js	304 B
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery/granite.min.js	1.7 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/toggle-show-hide.js	437 B
www.oclc.org/apps/oclc/docroot/js/pardot.loader-1.0.js	684 B
www.oclc.org/etc.clientlibs/foundation/clientlibs/jquery-ui.min.js	3.4 KiB
www.oclc.org/etc.clientlibs/foundation/clientlibs/shared.min.js	7.2 KiB
www.oclc.org/etc.clientlibs/foundation/clientlibs/jquery.min.js	114 B
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery/animation.min.js	957 B
www.oclc.org/apps/settings/wcm/designs/oclc/js/jquery/jquery.url.min.js	856 B
www.oclc.org/etc.clientlibs/clientlibs/granite/utils.min.js	3.5 KiB
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery/oclc.min.js	200 B
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.css	5.3 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.css	5.3 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shCore.css	1.3 KiB
www.oclc.org/content/dam/oclc/homepage/css/homepages_all.css	3.8 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/syntaxhighlighter/shThemeDefault.css	750 B	151 ms
www.oclc.org/content/dam/common/css/oclc-fonts.css	678 B
cdn.cookielaw.org/scripttemplates/otSDKStub.js	9.1 KiB	982 ms
/p.css?s=1&k=xyd8noe&ht=tk&f=4648.4649.4650.2030.2032&a=5...	172 B	753 ms
use.typekit.net/xyd8noe.css	1.0 KiB	760 ms

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

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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: 2.7 s

URL	Time Spent
oclc.org/	1.3 s
www.oclc.org/	1.4 s
www.oclc.org/content/marketing/publish/en_us/home.html?redirect=true	0.0 ms
www.oclc.org/en/home.html?redirect=true	0.0 ms

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: 1.2 s

URL	Time Spent
www.oclc.org/en/home.html?redirect=true	1.3 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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 8.9 KiB

URL	Transfer Size	Est Savings
www.oclc.org/apps/settings/wcm/designs/oclc/oclc-main-v2/main.css?v=20260326	75.4 KiB	8.9 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 600 ms 151.4 KiB

URL	Transfer Size	Est Savings
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.8 KiB	69.9 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.8 KiB	69.9 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/mainnavigation-functions-v0.3.js	13.5 KiB	5.6 KiB
/dcdn/settings.js?a=743027&settings_type=4&ts=1776790939&...	27.1 KiB	3.7 KiB
www.oclc.org/apps/settings/wcm/designs/oclc/js/jquery/jquery.easing.js	5.8 KiB	2.3 KiB

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: 450 ms 129.2 KiB

URL	Transfer Size	Est Savings
www.oclc.org/apps/settings/wcm/designs/oclc/oclc-main-v2/main.css?v=20260326	75.3 KiB	70.5 KiB
www.oclc.org/content/dam/fonts/647829/1F3891204C471A63E.css	36.7 KiB	36.7 KiB
@layer properties { @supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz…	11.1 KiB	11.1 KiB
@layer properties { *, ::backdrop, ::after, ::before { --tw-translate-x: 0; --tw-translate-y: 0; …	10.8 KiB	10.8 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: 3.3 s 866.1 KiB

URL	Transfer Size	Est Savings
www.oclc.org/etc.clientlibs/clientlibs/social/thirdparty/ckeditor.min.js	232.4 KiB	202.1 KiB
static.cloud.coveo.com/headless/v3.49.3/headless.esm.js	169.0 KiB	123.1 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.8 KiB	113.0 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.8 KiB	112.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-TC83QFB	187.8 KiB	85.4 KiB
cdn.cookielaw.org/scripttemplates/202505.1.0/otBannerSdk.js	118.6 KiB	74.9 KiB
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.js	69.5 KiB	60.2 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.js	68.0 KiB	58.9 KiB
static.cloud.coveo.com/atomic/v3/npm.dayjs-2661949a.js	36.0 KiB	35.5 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
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js	5.6 s	5.6 s	10 ms
www.oclc.org/en/home.html?redirect=true	1.6 s	842 ms	100 ms
Unattributable	945 ms	167 ms	0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-TC83QFB	478 ms	399 ms	68 ms
static.cloud.coveo.com/atomic/v3/6610-0d18ce17.js	281 ms	227 ms	0.2 ms
cdn.cookielaw.org/scripttemplates/202505.1.0/otBannerSdk.js	216 ms	129 ms	35 ms
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	185 ms	52 ms	131 ms
www.oclc.org/etc.clientlibs/clientlibs/social/thirdparty/ckeditor.min.js	150 ms	59 ms	86 ms
www.oclc.org/apps/settings/wcm/designs/oclc/js/mainnavigation-functions-v0.3.js	93 ms	66 ms	1.8 ms
static.cloud.coveo.com/atomic/v3/6577-1eb70d3c.js	77 ms	75 ms	0.1 ms
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery/granite.min.js	77 ms	36 ms	27 ms
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/modernizr.min.js	73 ms	43 ms	1.6 ms
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui.min.js	63 ms	39 ms	23 ms
/dcdn/settings.js?a=743027&settings_type=4&ts=1776790939&...	57 ms	23 ms	34 ms
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery-ui.min.js	54 ms	27 ms	25 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	7.9 s
Other	1.1 s
Script Parsing & Compilation	589 ms
Style & Layout	477 ms
Parse HTML & CSS	104 ms
Garbage Collection	80 ms
Rendering	52 ms

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
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	694.6 KiB
/content/dam/oclc/design-images/home-page/us-en/bg_homepa...	368.7 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	298.1 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	257.5 KiB
www.oclc.org/etc.clientlibs/clientlibs/social/thirdparty/ckeditor.min.js	232.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-TC83QFB	188.2 KiB
static.cloud.coveo.com/headless/v3.49.3/headless.esm.js	169.5 KiB
/content/oclcdata/en_us/references/home-page/jcr:content/...	157.8 KiB
www.oclc.org/apps/oclc/clientlibs/oclc/jquery-ui/source/jquery-ui.min.js	131.9 KiB
cdn.cookielaw.org/scripttemplates/202505.1.0/otBannerSdk.js	118.8 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
Photo: Librarian taking an online WebJunction course `div.col0 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...
Photo: Woman using laptop on home patio `div.col1 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...
Photos: People reading e-content on laptops and tablets `div.col0 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...
Photo: WMS on laptop in library setting `div.col1 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/oclcdata/en_us/references/home-page/jcr:content/...
Icon: Products and Services `div.col0 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/marketing/publish/en_us/home/jcr:content/par/par...
Icon: Membership `div.col1 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/marketing/publish/en_us/home/jcr:content/par/par...
Icon: Research `div.col2 > div.image > figure.figure-stack-image > img.cq-dd-image`	/content/marketing/publish/en_us/home/jcr:content/par/par...
OCLC logo `div.logo > div > a > img.oclc-logo`	www.oclc.org/content/dam/oclc/design-images/navigation-logo.svg
OCLC logo `div.col0 > div.globallogo > a > img.footer-logo`	www.oclc.org/content/dam/oclc/design-images/navigation-logo.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Avoid long main-thread tasks 20 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 1,630 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

100

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.

○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

●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.

●`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

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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[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

○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

○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.

○Skip links are focusable.

○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.

○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 display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
Next `div.text > p.dropnav-bottom > a > img.img-nobrdr`	www.oclc.org/content/dam/oclc/logos/next-blog-logo.png	277 x 32 (8.66)	277 x 93 (2.98)

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
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.	www.oclc.org/etc.clientlibs/clientlibs/granite/jquery/granite.min.js line 5, col 382

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
www.oclc.org/apps/oclc/docroot/js/pardot.loader-1.0.js line 28, col 20	`Failed to determine Pardot instance: parsererror SyntaxError: Unexpected end of JSON input at parse (<anonymous>) at https://www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js:151:79 at c (https://www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js:151:202) at XMLHttpRequest.<anonymous> (https://www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js:162:65)`
www.oclc.org/etc.clientlibs/clientlibs/granite/jquery/granite.min.js line 6, col 278	`Failed to load resource: the server responded with a status of 404 ()`
www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js line 78, col 499	`TypeError: $CQ.ajax(...).complete is not a function at CQ_Analytics.SegmentMgr.CQ_Analytics.SegmentMgr.loadSegments (https://www.oclc.org/etc.clientlibs/cq/personalization/clientlib/personalization/kernel.min.js:70:305) at HTMLDocument.<anonymous> (https://www.oclc.org/en/home.html?redirect=true:257:33) at T (https://www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js:76:262) at ua (https://www.oclc.org/etc.clientlibs/oclc/clientlibs/oclc/jquery.min.js:77:77)`

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●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

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●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

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

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`