I have added Notification to my project and want to display a toast that the user needs to click on to dismiss. I would assume that the option tapToDismiss is exactly for that purpose :-)

The toast do appear but disappers automatically after a few seconds.

This is how I initiate the toast from a service:

const options = { tapToDismiss: true,  toastClass: 'black', positionClass: 'md-toast-bottom-right' };
this.toast.error('Error message', msg, options);