JavaScript如何用变量参数的相关内容

问答 2020-06-09 来自：开发者社区

js正则表达式如何用变量的值当做参数？：报错

var str = 123;var content = "123woaini"; content.replace(/str/,"abc");结果并不是abcwoaini，这样写是去content中找有没有str并不是匹配123，我现在replace第一个参数是变量是未知的，不能写死是123 该如何解决这个问题呢？

问答 2016-07-18 来自：开发者社区

js正则表达式如何用变量的值当做参数？

var str = 123;var content = "123woaini";content.replace(/str/,"abc");结果并不是abcwoaini，这样写是去content中找有没有str并不是匹配123，我现在replace第一个参数是变量是未知的，不能写死是123该如何解决这个问题呢？

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更新时间 2022-09-30 13:59:08

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