Javascript动态正则表达式生成 [英] Javascript Dynamic Regex Generation

问题描述

我希望以一种方式使我的字母数字正则表达式动态，它允许用户使用允许的特殊字符作为参数。以下是我的代码...我在这里得到引号错误....任何机构都可以告诉我该如何去做？

I want to make my alphanumeric regex dynamic in a way that it takes the allowed special characters with it as an argument by the user. Following is my code ... I am getting quotes error here .... any body can tell me how to go about it ?

function aplhanumeric(value,allowed){

///^[a-z0-9_\-]+$/i
alert(allowed);
if(allowed != ''){
    var regex = new RegExp('/^[a-z0-9_\' + allowed + ']+$/i');
    return (value.match(regex));
}else{
    return (alphaNumericRegex.test(value));
}
}

推荐答案

你实际上已经逃脱了报价，所以你必须逃避逃避

You've actually escaped the quote, so you have to escape the escape

var regex = new RegExp("^[a-z0-9_\\" + allowed + "]+$", "i");

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