JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="A" class="test" value="aa">
   <input type="text" id="B" class="test" value="bb">

CSS

ul ul {
    padding-left: 10px;
}

JavaScript

var str = $('.test').map(function(){
    return this.value;
}).get().join(',');

alert(str);