如何在带有正则表达式的javascript或jquery中基于特定字符删除句子的最后一个字符

Question

我有一个句子“欢迎来到项目中，您是a”，在这里我需要删除“ a”，该句子仅在句子包含最后一个字母为“ a”时才删除，否则我已经尝试过此代码，但在这里不起作用

HTML

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="messages"></ul>

脚本

var text = 'Welcome to project, are you a (1. new user one, 2. test user two, 3. minor Accident one or 4. Major Accident)';
    var regex = /\((.*)\)/;
    var m;
    m = regex.exec(text);
        console.log(m[1]);
        // 1. new user one, 2. test user two, 3. minor Accident one or 4. Major Accident
        var list = m[1];

        var items = list.split(/([\d]. )/g);

        var message = $('.messages');

    var introText = text.split('(');
    var test = introText[0]
    alert(test.replace(/\a$/, ""));

Answer 1

在下面使用以下脚本：

var text = 'Welcome to project, are you a (1. new user one, 2. test user two, 3. minor Accident one or 4. Major Accident)';
    var regex = /\((.*)\)/;
    var m;
    m = regex.exec(text);
        console.log(m[1]);
        // 1. new user one, 2. test user two, 3. minor Accident one or 4. Major Accident
        var list = m[1];

        var items = list.split(/([\d]. )/g);

        var message = $('.messages');

    var introText = text.split('(');
    var test = introText[0].trim();
    //alert(test.replace(/\a$/, ""));
    if(test.slice(-2) == " a"){
    	alert(test.slice(0,-1));	
    }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="messages"></ul>