js正则中的贪婪和非贪婪模式问题总结

var b="abeeee:eeeee:eeeeeab";
        console.log(b.match(/e+:e+/g));//["eeee:eeeee"]贪婪模式，只显示第一个匹配到的
        console.log(b.match(/e+?:e+?/g));//["eeee:e", "eeee:e"]非贪婪模式，从前向后查询
        console.log(b.match(/e+:(?=e+)/g));//["eeee:", "eeeee:"]
        console.log(b.match(/e+?:(?=e+)/g));//["eeee:", "eeeee:"]
        console.log(b.match(/(?<=e+)?:(?=e+)/g));//[":", ":"]
        console.log(b.match(/e+?:(?!e+)/g));//null
        console.log(b.match(/(?:e+)?:(?:e+?)/g));//["eeee:e", "eeee:e"]