We'll create fresh WordPress site with HTTP/2 Push, Async JavaScript, Defer Render Blocking CSS, HTTP2 server push, HTTP3 push installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Async / Defer / Remove any JS file throughout the site or based on the WordPress page type
You can create mobile device specific rule to push, pre-load, remove, async js or css, this works based on the device user agent detection
You can create desktop device specific rule to push, pre-load, remove, async js or css, this works based on the device user agent detection
Conditionally remove JS and CSS from various WooCommerce pages like checkout page, cart page, product page, product category page
You can push pre-load resource specific on some pages by there ID
Remove CSS, JS specific to page or post by there ID
Mobile and Desktop detection works based on the wp_is_mobile() function of the WordPress that detect device based on the user agent date send in the request
Apart from this it also offer ability to remove Css and JS file from specific pages based in the selected page tag conditions
Eg: if css path is https://s.w.org/style/wp4.css
then you can match it with wp4.css or style/wp4.css or s.w.org/style/wp4.css
you use 2nd method (style/wp4.css) for more precise selection (this avoid error when there are 2 style with same file name)