Chartist use of typescript mime type

[randyvicar]

I am having a heck of a time trying to get Chartist to work on my LAMP stack using Ubuntu 18.04. I added the .ts text/x.typescript mime type to my apache2.config file and Firefox dev console is saying it's a disallowed MIME type. I first tried text/typescript with the same result. When I changed the extension to .js I got the error that the import line was not the first line of the module, which it was. Is anyone else having these issues? What am I missing? Thank you for any insights.