Remove WordPress emojis for performance

Unload WordPress Emoji icon libraries to improve front-end performance. Could degrade sites that need them for blog comments, etc.

// Disable the emoji's
add_action( 'init', function() {

	remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
	remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
	remove_action( 'wp_print_styles', 'print_emoji_styles' );
	remove_action( 'admin_print_styles', 'print_emoji_styles' ); 
	remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
	remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); 
	remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );

	// Filter function used to remove the tinymce emoji plugin.
	add_filter( 'tiny_mce_plugins', function( $plugins ) {

		if( is_array( $plugins ) ) {
			return array_diff( $plugins, array( 'wpemoji' ) );
		} else {
			return [];
		}

	} );

	// Remove emoji CDN hostname from DNS prefetching hints.
	add_filter( 'wp_resource_hints', function( $urls, $relation_type ) {

		if( 'dns-prefetch' == $relation_type ) {
			$emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );
			$urls = array_diff( $urls, array( $emoji_svg_url ) );
		}

		return $urls;

	}, 10, 2 );

} );

Instructions for Remove WordPress emojis for performance

  1. Log into a staging or locally hosted clone of your site.
  2. Install and activate Code Snippets plugin.
  3. WP Admin > Snippets > Add New
  4. Copy and paste the code from the section above.
  5. Check to ensure formatting came over properly.
  6. Customize the code as desired.
  7. Add a meaningful title.
  8. Select whether to run on front-end or back-end (or both).
  9. Click “Save and Activate”.
  10. Test your site to ensure it works.
  11. Disable if any problems, or recover.
  12. Repeat for live environment.

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License

All code snippets are licensed GPLv2 (or later) matching WordPress licensing.

Except when otherwise stated in writing the copyright holders and/or other parties provide the program as-is without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Disclaimer of warranty
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