js 正则表达式如何匹配逗号分隔 不包含()之内的内容

Question

js 正则表达式如何匹配逗号分隔 不包含()之内的内容
例如
var str="123(xxxx),456,dd(hh(xxxx,xxxx),ww(xxxx,xxxx))";
var newstr=str.split(正则表达式)
alert(nrewstr) //["123(xxxx)","456","dd(hh(xxxx,xxxx),ww(xxxx,xxxx))"]

Answer 1

,(?![^()]*+\))

Answer 2

"123(xxxx),456,dd(ad,da)".split(/,|(\w*\(\w*,\w*\)\w*)/).filter(Boolean)