diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/js/wp-sanitize.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/js/wp-sanitize.js	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,47 @@
+( function () {
+
+	window.wp = window.wp || {};
+
+	/**
+	 * wp.sanitize
+	 *
+	 * Helper functions to sanitize strings.
+	 */
+	wp.sanitize = {
+
+		/**
+		 * Strip HTML tags.
+		 *
+		 * @param {string} text Text to have the HTML tags striped out of.
+		 *
+		 * @return  Stripped text.
+		 */
+		stripTags: function( text ) {
+			text = text || '';
+
+			return text
+				.replace( /<!--[\s\S]*?(-->|$)/g, '' )
+				.replace( /<(script|style)[^>]*>[\s\S]*?(<\/\1>|$)/ig, '' )
+				.replace( /<\/?[a-z][\s\S]*?(>|$)/ig, '' );
+		},
+
+		/**
+		 * Strip HTML tags and convert HTML entities.
+		 *
+		 * @param {string} text Text to strip tags and convert HTML entities.
+		 *
+		 * @return Sanitized text. False on failure.
+		 */
+		stripTagsAndEncodeText: function( text ) {
+			var _text = wp.sanitize.stripTags( text ),
+				textarea = document.createElement( 'textarea' );
+
+			try {
+				textarea.innerHTML = _text;
+				_text = wp.sanitize.stripTags( textarea.value );
+			} catch ( er ) {}
+
+			return _text;
+		}
+	};
+}() );