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js拼接动态正则
2021-05-17 10:05:26
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### **使用eval(), 注意"\"需要转义** ``` var a = 1 var reg = `\/^.{${a}}$\/` eval(reg).test("1") // true eval(reg).test("11") // false ``` ### **使用new RegExp()** ``` var a = 1 var reg = new RegExp(`^.{${a}}$`, "gi") // gi可选 eval(reg).test("1") // true eval(reg).test("11") // false
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