Aimy Speed Optimization v14.0 introduces JavaScript and CSS preloading. Resources queued to eliminate render blocking can be automatically preloaded.
Preloading
Aimy Speed Optimization v14.0 allows to advice a browser to preload all JavaScript and CSS resources needed to fully render a page automatically when the “Eliminate Render Blocking” option is active. Just make sure the new option “Use Automatic Preloading?” is enabled as well.
Aimy Speed Optimization will then insert appropriate link elements to the
head of a page’s HTML document, i.e.
<link rel="preload" href="/templates/test/js/site.js" as="script">
This will speed up the rendering of your website’s pages in all browsers that already support preloading.
Joomla! 4 Beta
Aimy Speed Optimization v14.0 is compatible with Joomla! 4.0 Beta 1.