static _createContainer() {
      let container = document.createElement('div');
      container.setAttribute('id', 'toast-container');

      // Add event handler
      container.addEventListener('touchstart', Toast._onDragStart);
      container.addEventListener('touchmove', Toast._onDragMove);
      container.addEventListener('touchend', Toast._onDragEnd);

      container.addEventListener('mousedown', Toast._onDragStart);
      document.addEventListener('mousemove', Toast._onDragMove);
      document.addEventListener('mouseup', Toast._onDragEnd);

      document.body.appendChild(container);
      Toast._container = container;
    }
Append toast container and add event handlers