Instant WordPress Optimizations

functions.php

// --- Front-end Enhancements and Optimizations ---- //

if (!is_admin()) {

 // Function to defer or asynchronously load scripts
 function js_async_attr($tag){

 # Do not add defer or async attribute to these scripts
 $scripts_to_exclude = array('script1.js', 'https://domain.com/wp-includes/js/jquery/jquery.js');

 foreach($scripts_to_exclude as $exclude_script){
  if(true == strpos($tag, $exclude_script ) )
  return $tag;
 }

 # Defer or async all remaining scripts not excluded above
 return str_replace( ' src', ' defer="defer" src', $tag );
 }
 add_filter( 'script_loader_tag', 'js_async_attr', 10 );

 // Remove Query Strings From Static Resources
 function remove_cssjs_ver( $src ) {
  if( strpos( $src, '?ver=' ) )
  $src = remove_query_arg( 'ver', $src );
  return $src;
 }
 add_filter( 'style_loader_src', 'remove_cssjs_ver', 10, 2 );
 add_filter( 'script_loader_src', 'remove_cssjs_ver', 10, 2 );

 // Remove Emoji Scripts & Comment Reply JS
 remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
 remove_action( 'wp_print_styles', 'print_emoji_styles' );
 function clean_header(){ wp_deregister_script( 'comment-reply' ); } add_action('init','clean_header');

}