带有可变字符串的javascript正则表达式模式不起作用 [英] javascript regex pattern with a variable string not working

问题描述

我正在尝试创建一个将一些参数传递给正则表达式脚本的函数:

I am trying to create a function that will pass some parameters to a regex script:

function classAttributes( classString, className ) {
    var data;
    var regex = new RegExp(className+"\[(.*?)\]");
    var matches = classString.match(regex);

    if ( matches ) {
        //matches[1] refers to options inside [] "required, email, ..."
            var spec = matches[1].split(/,\s*/);

            if ( spec.length > 0 ) {
                data = spec;
            }
    }

    return data;
}

但是由于某种原因，它不喜欢我传递给它的字符串变量"new RegExp(className +" [(.*?)]);" 它不会引发错误，但是验证不起作用.

but for some reason it doesnt like the string variable that I pass it "new RegExp(className+"[(.*?)]");" it doesnt throw an error but the validation doesnt work.

我将从类stribute中获取信息，并将其作为classString传递

I will take the information from the class stribute and pass it as classString

<div class="field-character-count test[asd, 123, hello]"></div>

和"className"将代表测试"

and the "className" will represent "test"

推荐答案

我认为您需要在搜索字符串中转义反斜杠-

I think you need to escape the backslashes inside the search string -

var regex = new RegExp(className+"\\[(.*?)\\]");

这篇关于带有可变字符串的javascript正则表达式模式不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！