$.fn.clicker = function() {
  var template = `
    <div class="clicker">
      <p>You clicked <span class="panel">0</span> times</p>
      <button>Click Me</button>
    </div>
  `;
  
  this.html(template);
  this.find('.clicker').each(function() {
    $(this).data('clicks', 0);
  });
  
  this.on('click', 'button', function() {
    var $this = $(this).closest('.clicker');
    var clicks = $this.data('clicks');
    clicks++;
    $this.data('clicks', clicks);
    $this.find('.panel').text(clicks);
  });
};

$('.clicker').clicker();