JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.11.0.min.js"></script>
<div class="users-select">
  <div class="user">
    <label>
      <input type="checkbox"> User #1
    </label>
  </div>
  
</div>

CSS

.users-select {
  max-height: 250px;
  overflow: scroll;
}

JavaScript

function render() {
	var $users = $('.users-select');
  var users_html = '';
  for(var i = 0; i < 10000; i++) {
    users_html += `<div class="user">
      <label>
        <input type="checkbox"> User #${i}
      </label>
    </div>`;
  }
  
  $users.html(users_html); 
}