XD is not intended as a replacement for Muse. It's a tool for designing and prototyping user interfaces. There are requests for us to add the ability to export HTML or to make it easy to convert to HTML, so you may want to go vote for these features:
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According to Creative Bloq, "Adobe currently suggests export to their Dreamweaver and Muse platforms". See here: Adobe launches all-new design tool | Software | Creative Bloq
If you guys do get around to looking into code options, especially when you start working on micro-interactions and animation, you might want to consider what's on the horizon from InVision: Prototype interactions & animations in InVision (see the 42 second mark). Now that would be cool!
What about XD mobile designs?... will they be exported to xCode... this would be sweet for informative apps.
I don't see a suggestion yet for that kind of feature in UserVoice, please go add it here: Adobe XD: Feature Requests: Top (407 ideas) – Adobe XD Feedback : Feature Requests & Bugs