Integrate Tableau dashboard through IFrame

Hello,

I'm trying to integrate a Tableau dashboard (html and JavaScript Code or URL) but I can't find any way to do so. I've tried both IFrame and HtmlSnippet widgets but they both have constraints : HtmlSnippet let you use Html OR JavaScript code thus not recognizing my mixed code AND I couldnt find enough documentation about how IFrame works.

Thanks for you help,

Mehdi