Html Embedded Scripts mode
Mode for html embedded scripts like JSP and ASP.NET. Depends on multiplex and HtmlMixed which in turn depends on
JavaScript, CSS and XML.
Other dependencies include those of the scripting language chosen.
MIME types defined: application/x-aspx (ASP.NET),
application/x-ejs (Embedded Javascript), application/x-jsp (JavaServer Pages)
and application/x-erb