JS——动态正则

var names = ["明月","紫烟","青天","白鹭"];var str  = "窗前明月光，日照香炉生紫烟，一行白鹭上青天";//var kwords = str.match(/明月|紫烟/g); //可以//var kwords = str.match(/names.join("|")/g); //不可以的var reg = new RegExp(names.join("|"),"g"); //动态创建一个正则表达式var kwords = str.match(reg);console.log(kwords);