code: function(toastElement) {
        // Hiding the element
        // toastElement.classList.remove("on");
        toastElement.className = toastElement.className.replace(" on", "");
  
        // Removing the element from DOM after transition end
        window.setTimeout(
          function() {
            // Remove the elemenf from the DOM
            toastElement.parentNode.removeChild(toastElement);
  
            // Calling the callback function
            this.options.callback.call(toastElement);
  
            // Repositioning the toasts again
            Toastify.reposition();
          }.bind(this),
          400
        ); // Binding `this` for function invocation
      }
docs: Removing the element from the DOM