chainable
Description: Shows the dialog
Parameters:
@modal {Boolean} Indicates whether to show this dialog as modal or not. @className {String} Specifies a custom class name to add to the dialog.
@modal {Boolean} Indicates whether to show this dialog as modal or not.
{Boolean}
@className {String} Specifies a custom class name to add to the dialog.
{String}
alertify.prompt().set('message', 'prompt dialog!').show();