Ticket #30966: 30966.9.patch

src/wp-admin/js/word-count.js

@@ -15 +15 @@
                 HTMLRegExp: /<\/?[a-z][^>]*?>/gi,
                 spaceRegExp: /&nbsp;|&#160;/gi,
                 removeRegExp: /[0-9.(),;:!?%#$¿'"_+=\\\/-]+/g,
+                astralRegExp: /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
                 wordsRegExp: /\S\s+/g,
                 charactersRegExp: /\S/g,
                 l10n: window.wordCountL10n || {}
@@ -32 +33 @@
                         text = text.replace( this.settings.spaceRegExp, ' ' );
                         text = text.replace( this.settings.removeRegExp, '' );
 
+                        if ( type === 'characters' ) {
+                                text = text.replace( this.settings.astralRegExp, 'a' );
+                        }
+
                         text = text.match( this.settings[ type + 'RegExp' ] );
 
                         if ( text ) {