text: 'use strict';
  
  var matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
  
  module.exports = function (str) {
  	if (typeof str !== 'string') {
  		throw new TypeError('Expected a string');
  	}
  
  	return str.replace(matchOperatorsRe,  '\\$&');
  };
  