Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
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.
Performance issues directly impact user engagement and conversion rates.
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.
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
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
U.S. Senators Warren Magnuson (D-WA) and Ted Stevens (R-AK) authored the origin… div.c-field > div.c-field__content > div.c-field__item > img | /sites/default/files/styles/landscape_width_650px_webp/pu... | 26.0 KiB | 18.6 KiB |
A heavy-duty truck fitted with a large, spherical mobile radar on the roof, wit… div.c-field > div.c-field__content > div.c-field__item > img | /sites/default/files/styles/landscape_width_650px_webp/pu... | 24.4 KiB | 17.5 KiB |
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| noaa.gov/ | 599 ms |
| www.noaa.gov/ | 0.0 ms |
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
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
The solar-powered and self-propelled SeaTrac can stay at sea for months, collec… div.c-field > div.c-field__content > div.c-field__item > img | 0.111 |
Another ocean drone joins NOAA’s growing fleet div.c-field > div.c-field__item > article.node > div.c-field | 0.069 |
Help improve this site body#top--br-qKA-ONeI > div > button#fba-button | 0.000 |
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.noaa.gov/themes/custom/noaa_guswds/dist/css/styles.css?tdkj91 | 613.6 KiB | 543.3 KiB |
| .fba-modal-dialog { font-family: Source Sans Pro Web, Helvetica Neue, Helvetica, Roboto, Arial, sa… } … | 52.1 KiB | 49.5 KiB |
| www.noaa.gov/themes/custom/noaa_guswds/dist/css/back-to-top.css?tdkj91 | 17.3 KiB | 16.3 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.noaa.gov/themes/custom/noaa_guswds/dist/js/common.js?tdkj91 | 125.8 KiB | 125.0 KiB |
| www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c>m=4e64f0 | 147.0 KiB | 105.9 KiB |
| www.noaa.gov/modules/custom/noaa_weather/js/handlebars-v4.0.4.js?tdkj91 | 155.8 KiB | 103.3 KiB |
| siteimproveanalytics.com/js/siteanalyze_6294131.js | 104.7 KiB | 66.9 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L | 128.2 KiB | 63.8 KiB |
| www.noaa.gov/libraries/owlcarousel2/dist/owl.carousel.js?tdkj91 | 87.9 KiB | 62.9 KiB |
| www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L | 147.0 KiB | 62.5 KiB |
| www.googletagmanager.com/gtag/js?id=G-FVJXY24VSZ | 148.1 KiB | 60.0 KiB |
| www.noaa.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 | 85.5 KiB | 43.2 KiB |
| www.noaa.gov/core/misc/ajax.js?v=10.6.5 | 65.0 KiB | 41.4 KiB |
| www.noaa.gov/libraries/slick/slick/slick.min.js?tdkj91 | 42.4 KiB | 39.9 KiB |
| www.noaa.gov/libraries/tooltipster/dist/js/tooltipster.bundle.min.js?tdkj91 | 39.0 KiB | 35.3 KiB |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| .fba-modal-dialog { font-family: Source Sans Pro Web, Helvetica Neue, Helvetica, Roboto, Arial, sa… } … | 52.1 KiB | 5.6 KiB |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.noaa.gov/modules/custom/noaa_weather/js/handlebars-v4.0.4.js?tdkj91 | 155.8 KiB | 57.6 KiB |
| www.noaa.gov/core/misc/ajax.js?v=10.6.5 | 65.0 KiB | 45.6 KiB |
| www.noaa.gov/libraries/owlcarousel2/dist/owl.carousel.js?tdkj91 | 87.9 KiB | 35.3 KiB |
| www.noaa.gov/core/misc/drupal.js?v=10.6.5 | 20.6 KiB | 16.2 KiB |
| touchpoints.app.cloud.gov/touchpoints/1f162941.js | 79.8 KiB | 9.6 KiB |
| www.noaa.gov/modules/custom/noaa_weather/js/noaa_weather.js?tdkj91 | 21.3 KiB | 6.1 KiB |
| www.noaa.gov/core/misc/message.js?v=10.6.5 | 8.2 KiB | 5.5 KiB |
| www.noaa.gov/core/misc/progress.js?v=10.6.5 | 5.1 KiB | 3.3 KiB |
| www.noaa.gov/core/misc/announce.js?v=10.6.5 | 4.2 KiB | 3.2 KiB |
| www.noaa.gov/libraries/superclick/src/js/superclick.js?tdkj91 | 7.1 KiB | 2.0 KiB |
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
NOAA logo div.l-constrain > div#block-noaa-guswds-branding > a.c-site-logo > img.c-site-logo__image | www.noaa.gov/themes/custom/noaa_guswds/images/noaa_digital_logo.svg |
National Oceanic and Atmospheric Administration logo header > h1#fba-form-title-1f162941 > div.margin-bottom-2 > img.form-header-logo-square | /uploads/form/logo/3708/logo_square_NOAA-logo.jpg |
U.S. flag header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag | www.noaa.gov/themes/custom/noaa_guswds/dist/images/us_flag_small.png |
U.S. flag footer.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag | touchpoints.app.cloud.gov/img/us_flag_small.png |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Best practices
Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
U.S. Department of Commerce header.l-header > div.l-constrain > div#block-noaa-guswds-branding > a.c-site-slogan |
These items highlight common accessibility best practices.
Best Practices
General
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
Performance issues directly impact user engagement and conversion rates.
| Description |
|---|
TypeError: $ is not a function
at <anonymous>:1:199
at <anonymous>:1:365
at https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:767:429
at qR (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:769:31)
at Md.pR (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:766:92)
at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:306:187)
at k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:235:466)
at fb (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:198:719)
at eb (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:198:470)
at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-MNK3D2L:259:473) |
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.