JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<button id="add">
  Add
</button>
<span class="content">
</span>
<span class="add-content">
</span>

JavaScript

$("#add").click(function(e) {
  e.preventDefault();
  $(".content").append(
    '<input class="input check-now" type="number" min="0" value="4" />'
  )
  $('.check-now').trigger("change");
  $('.check-now').removeClass("check-now");
})

$(document).on("change", ".input", function() {
  if ($(this).val() > 0) {
    $(".add-content").append(
      '<input type="text" value="test" />'
    )
  }
})