JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>


<div class="label">Примеры работ: <span class="add-button js-add" >+</span></div><br>
      <div class="form js-form">
      <div class="form-row js-item">
        <label for="file1" class="label-file-selected">file1</label><input id="file1" class="hidden" type="file"><span class="delete-icon js-remove" >Delete</span>
      </div>
      </div>

JavaScript

$('.js-add').on('click', function() {
 
  $('.form').append('<div class="form-row js-item"><label for="file3" class="label-file-selected">file1</label><input id="file3" class="hidden" type="file"><span class="delete-icon js-remove" >Delete</span></div>');
});


$('.js-form').on('click', '.js-remove', function() {
 
  $(this).closest('.js-item').remove();
});