Lsst.org Site Title
Rubin Observatory | Opening a digital window for discovery of the dynamic universe.
Lsst.org Test Results
lsst.org Mobile Usability: 96/100
Quick overview:
Size content to viewport
The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 432 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:
The element
<ul>GALLERY PUBLI…ST CORPORATION</ul> falls outside the viewport.
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Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
<a href="">Large Synoptic…rvey Telescope</a> is close to 1 other tap targets .
...
lsst.org Mobile Speed: 45/100
Quick overview:
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 421.6KiB (70% reduction).
Compressing https://www.lsst.org/sites/all/themes/edu/rs-plugin/js/jquery.themepunch.revolution.min.js?owhvd4 could save 61.8KiB (76% reduction).
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Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 28 blocking script resources and 10 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
https://www.lsst.org/sites/all/modules/jquery_update/replace/jquery/1.7/jquery.min.js?v=1.7.1
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Optimize CSS Delivery of the following:
https://www.lsst.org/sites/default/files/css/css_pbm0lsQQJ7A7WCCIMgxLho6mI_kBNgznNUWmTWcnfoE.css
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Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 342.1KiB (58% reduction).
Compressing https://www.lsst.org/sites/default/files/styles/galleryformatter_slide/public/1280_16Dpu4U5yMUM_0.jpg?itok=cqgCKIm_ could save 111.1KiB (70% reduction).
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Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 103.9KiB (42% reduction).
Minifying https://www.lsst.org/sites/all/themes/edu/js/bootstrap.js?owhvd4 could save 26.8KiB (45% reduction).
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Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://m.addthisedge.com/live/boost/ra-58eff33a0ba1da77/_ate.track.config_resp (58 seconds)
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Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 7.8KiB (23% reduction).
Minifying https://www.lsst.org/ could save 7.8KiB (23% reduction).
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