xregexp-lookbehind
A tiny node wrapper around slevithan's lookbehind implementation.Usage
var merge = require('lodash.merge');
var XRegExp = require('xregexp').XRegExp;
merge(XRegExp, require('xregexp-lookbehind'));
console.log(XRegExp.matchAllLb("Catwoman's cats are fluffy cats", '(?i)(?<!fluffy\\W+)', /cat\w*/i));
// ['Catwoman', 'cats']