JSFiddle - React, Tailwind, and code Playground

HTML

<label>Name</label>
<input type="text" value="Jim" id="demo_1" name="demo_name" class="input-medium" />
<label>Id</label>
<input type="text" value="123" id="demo_1" name="demo_name" class="input-medium">
<button id="demo_submit" class="btn" name="demo_submit" type="button">Submit</button>
    <button id="demo_add" class="btn" name="demo_add" type="button">Add more</button>
<div id='add'></div>

JavaScript

$('#demo_add').click(function () {
    $inputName = "<input type='text' placeholder='Name'/>";
    $inputId = "<input type='text' placeholder='Id'/>";
    $br = "<br/>";
    $('#add').append($inputName);
    $('#add').append($inputId);
    $('#add').append($br);
});