es5-ext/reg-exp/escape.js

// 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, "\\$&");
};