js正則中的貪婪和非貪婪模式問題總結

標籤：

var b="abeeee:eeeee:eeeeeab";        console.log(b.match(/e+\:e+/g));//["eeee:eeeee"]貪婪模式，只顯示第一個匹配到的        console.log(b.match(/e+?\:e+?/g));//["eeee:e", "eeee:e"]非貪婪模式，從前向後查詢        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"]

 

js正則中的貪婪和非貪婪模式問題總結