--- /dev/null
+// Thanks to Andrew Clover:
+// http://stackoverflow.com/questions/3561493
+// /is-there-a-regexp-escape-function-in-javascript
+
+'use strict';
+
+var re = /[\-\/\\\^$*+?.()|\[\]{}]/g;
+
+module.exports = function (str) { return String(str).replace(re, '\\$&'); };