easy-going-rails/app/views/layouts/_notification.html.erb

<%= turbo_frame_tag 'notification' do %>
  <% if flash.count.positive? %>
    <script>
      var commonOptions
      var noticeOptions
      var alertOptions
      if (typeof commonOptions === 'undefined'){
        commonOptions={
          gravity: 'top',
          position: 'center',
          duration: 4000,
          offset: { y: '1em' },
          close: true
        }
        noticeOptions={ className: 'toastify-notice', ...commonOptions }
        alertOptions={ className: 'toastify-alert', ...commonOptions }
      }

          var notice='<%= flash.notice %>'
          var alert='<%= flash.alert %>'
          <% flash.clear %>

          if (notice.length>0){
            console.info(`TOAST notice: ${notice}`)
            Toastify({ text: notice, ...noticeOptions }).showToast();
            notice=''
          }
          if (alert.length>0){
            console.warn(`TOAST alert: ${alert}`)
            Toastify({ text: alert, ...alertOptions }).showToast();
            alert=''
          }
    </script>
  <% end %>
<% end %>