Disable Emojis in WordPress 4.2. and Above for Better Performance

WordPress 4.2. introduced emoji functionality and inserted some inline js scripts into header area of your WordPress website.

script type="text/javascript">
			window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/72x72\/","ext":".png","source":{"concatemoji":"http:\/\/wp4toastmasters.com\/wp-includes\/js\/wp-emoji-release.min.js?ver=4.4.2"}};
			!function(a,b,c){function d(a){var c,d=b.createElement("canvas"),e=d.getContext&&d.getContext("2d"),f=String.fromCharCode;return e&&e.fillText?(e.textBaseline="top",e.font="600 32px Arial","flag"===a?(e.fillText(f(55356,56806,55356,56826),0,0),d.toDataURL().length>3e3):"diversity"===a?(e.fillText(f(55356,57221),0,0),c=e.getImageData(16,16,1,1).data.toString(),e.fillText(f(55356,57221,55356,57343),0,0),c!==e.getImageData(16,16,1,1).data.toString()):("simple"===a?e.fillText(f(55357,56835),0,0):e.fillText(f(55356,57135),0,0),0!==e.getImageData(16,16,1,1).data[0])):!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g;c.supports={simple:d("simple"),flag:d("flag"),unicode8:d("unicode8"),diversity:d("diversity")},c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.simple&&c.supports.flag&&c.supports.unicode8&&c.supports.diversity||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
		</script>

The code bloat is used to add support for emoji’s in older browswers. For those whose main traffic are from modern browsers, it’s a good idea to remove the scripts and get faster page loading.

Simple method is to install this plugin: https://wordpress.org/plugins/disable-emojis/

You can also copy the main code of this plugin and paste them into youractivetheme/functions.php  file

/**
 * Disable the emoji's
 */
function disable_emojis() {
    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' );
    add_filter( 'tiny_mce_plugins', 'disable_emojis_tinymce' );
}
add_action( 'init', 'disable_emojis' );

/**
 * Filter function used to remove the tinymce emoji plugin.
 * 
 * @param    array  $plugins  
 * @return   array             Difference betwen the two arrays
 */
function disable_emojis_tinymce( $plugins ) {
    if ( is_array( $plugins ) ) {
        return array_diff( $plugins, array( 'wpemoji' ) );
    } else {
        return array();
    }
}

 

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