Policy on Typescript

Is there any policy on the use of Typescript for writing add-ons?
How would it affect the review process if the JS has been generated from Typescript?

It’s allowed as long as you submit the original typescript sources as well as detailed steps to reproduce the generated code as a source package to your version on AMO. Platform independent build scripts are very welcome.

Note that it will increase review time as it needs to be reviewed by an admin.