JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <label for="file_1">Выберите файлы</label>
  <input type="file" class="filescount" id="file_1" name="file_1" multiple="multiple"/>
</div>

<div>
  <label for="file_2">Выберите файлы</label>
  <input type="file" class="filescount" id="file_2" name="file_2" multiple="multiple"/>
</div>

CSS

label {
    width: 180px;
    height: 50px;
    border-rdius: 4px;
    text-align: center;
    margin: 25px;
    cursor: pointer;
    display: block;
    font: 14px/50px Tahoma;
    transition: all 0.18s ease-in-out;
    border: 1px solid #4FD666;
    background: linear-gradient(to top right, #3EC97A, #69EA49 20%, rgba(255, 255, 255, 0) 80%, rgba(255, 255, 255, 0)) top right/500% 500%;
    color: #4FD666;
}

label:hover {
    color: white;
    background-position: bottom left;
}
    
.filescount {
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  overflow: hidden;
  position: absolute;
  z-index: -1;
}

JavaScript

// привет, хабр!
$(document).on('change', 'input[type=file].filescount', function() {
		var text_label_id = $(this).attr('id');
    var text_label = $('label[for="' + text_label_id + '"]');
    
    if ( $(this).val() != '' ){
      text_label.text( 'Выбрано файлов: ' + $(this)[0].files.length );
    } else {
      text_label.text( 'Выберите файлы' );
		}
});