Creating accessible interactive booklets for web

Hello, 

I am trying to create an multi-page booklet with interactions such as buttons, hyperlinks, animations, etc, that will be added to a website, and therefore needs to be accessible. I already know how to use the tools in InDesign to make a document accessible, but when you Publish Online, it looses it. 

I know you can export as a PDF, but I ideally need something more digital, that will still hold all my interacions and all the accessibility features I have set up within the design. 

This booklet needs to up uploaded to wordpress sites, and therefore EPUBs do not work either.

Does anyone have any advice as to how i would achieve this?