Jetpack is a powerpack plugin that comes with security, performance, and growth tools for WordPress websites. It offers a range of features to WordPress websites including integration with third-party plugins.
It allows you to turn on and off the features as you per your requirements. But it loads the styles of all the features in a large stylesheet. In simple words, the CSS style of a feature will be loaded even when you have turned off the feature.
To avoid loading the unwanted CSS code, you can use the below code. The first line tells jetpack to not concatenate all the CSS files.
You can also remove the lines for the features you want to use.
// First, make sure Jetpack doesn't concatenate all its CSS
add_filter( 'jetpack_implode_frontend_css', '__return_false' );
// Then, remove each CSS file, one at a time
function maverick_remove_all_jetpack_css() {
wp_deregister_style( 'AtD_style' ); // After the Deadline
wp_deregister_style( 'jetpack_likes' ); // Likes
wp_deregister_style( 'jetpack_related-posts' ); //Related Posts
wp_deregister_style( 'jetpack-carousel' ); // Carousel
wp_deregister_style( 'grunion.css' ); // Grunion contact form
wp_deregister_style( 'the-neverending-homepage' ); // Infinite Scroll
wp_deregister_style( 'infinity-twentyten' ); // Infinite Scroll - Twentyten Theme
wp_deregister_style( 'infinity-twentyeleven' ); // Infinite Scroll - Twentyeleven Theme
wp_deregister_style( 'infinity-twentytwelve' ); // Infinite Scroll - Twentytwelve Theme
wp_deregister_style( 'noticons' ); // Notes
wp_deregister_style( 'post-by-email' ); // Post by Email
wp_deregister_style( 'publicize' ); // Publicize
wp_deregister_style( 'sharedaddy' ); // Sharedaddy
wp_deregister_style( 'sharing' ); // Sharedaddy Sharing
wp_deregister_style( 'stats_reports_css' ); // Stats
wp_deregister_style( 'jetpack-widgets' ); // Widgets
wp_deregister_style( 'jetpack-slideshow' ); // Slideshows
wp_deregister_style( 'presentations' ); // Presentation shortcode
wp_deregister_style( 'jetpack-subscriptions' ); // Subscriptions
wp_deregister_style( 'tiled-gallery' ); // Tiled Galleries
wp_deregister_style( 'widget-conditions' ); // Widget Visibility
wp_deregister_style( 'jetpack_display_posts_widget' ); // Display Posts Widget
wp_deregister_style( 'gravatar-profile-widget' ); // Gravatar Widget
wp_deregister_style( 'widget-grid-and-list' ); // Top Posts widget
}
add_action('wp_print_styles', 'maverick_remove_all_jetpack_css' );
Credits: CSS Tricks