terrible if you need to optimize js/css – [Gutenberg] Review

If you are trying to optimize your website and find that you can no longer edit your blocks and only a blank page appears, you will need to remove the optimization or remove this plugin.

One solution I found to not remove this plugin and continue with the optimizations was to remove the non-critical js rendering through functions.php with the following function:

//remove render blocking from non-critical js
//- unless it is within the WordPress administration interface
//- and except cart_page

function defer_parsing_of_js ( $url ) {

     if ( is_admin() ) return $url;

     if ( is_cart () ) return $url;

     if ( FALSE === strpos( $url, '.js' ) ) return $url;

     if ( strpos( $url, 'jquery.js' ) ) return $url;

     return "$url' defer ";

}

add_filter( 'clean_url', 'defer_parsing_of_js', 11, 1 );