Where these .js file come to source code?

they’re wp_enqueue_script() scripts. You can remove them (if you’re positive nothing uses them) with wp_dequeue_script() similar to the following: add_action( ‘wp_enqueue_scripts’, function() { wp_deregister_script( ‘jquery’ ); wp_deregister_script( ‘wp-embed’ ); }, 99 ); or with add_filter( ‘wp_default_scripts’, function(&$scripts){ if(!is_admin()) { $scripts->remove( ‘jquery’ ); $scripts->remove( ‘wp-embed’ ); } } );

Excerpts on category page

Try this and place in your functions.php file: function custom_excerpt_length( $length ) { return 35; } add_filter( ‘excerpt_length’, ‘custom_excerpt_length’, 999 ); function excerpt_more( $more ) { return sprintf( ‘%2$s’, get_permalink( get_the_ID() ), __( ‘Read More’, ‘textdomain’ ) ); } add_filter( ‘excerpt_more’, ‘excerpt_more’ );