bootstrap tour with iframe contents

I have a web page. Where user can view tableau content.Now we are trying add web page walk through in it. When tried with driver.js and bootstrap tour we were able to set up the process for elements in our html code but when it goes for tableau components it is not displaying the tour content.

Tableau content is in iframe.

Please help.

Element :

$('[title="download"]',$('iframe').contents)

Please suggest any alternative library if available