<p>No; it is not possible. The only way this could be possible is via iframe HTML tag, but <a href="https://meta.stackexchange.com/questions/1777/what-html-tags-are-allowed-on-stack-exchange-sites">stackexchange allows only a limited number of HTML tags</a> and does not enable users to use any embedded content besides images. </p>

<p>I also do <em>not</em> think that we would need plotly for anything on CrossValidated. If you need an interactive plot for your answer, then it is probably not self-explanatory and you should improve the answer, rather than the graphics. Notice that most of the answers on CV do not use graphics, or use very limited and simple graphics. Interactive (i.e. more than 2D) graphics are needed to visualize pretty complicated data structures, and CV is not the place to discuss such data (it would need a detailed analysis, rather than a short answer). </p>

<p>CV is a place to ask and receive answers on general problems, possibly illustrated with simple data examples. Moreover, you can always post code that users can run on their own machines to interactively check something about your answer.</p>
