Developing custom devices from TypeScript instead of JavaScript

[mortenmoulder]

I've got a few devices added to Zigbee2MQTT already. My own devices. I want to modify them, because there's a new firmware update. I originally wrote them in JavaScript, so I could easily use the external_converters, but then I had to re-write them in TypeScript for the repository.

This seems like a cumbersome way of developing.

Instead, would it be possible to build it in TypeScript, then compile/build to a JavaScript, that can then be tested in Zigbee2MQTT?

My devices are added in the custom_devices_diy.ts file, and if I run npm run build, I get the "platform compatible" file, that should not be modified directly.

What I want is to go from TS -> JS, that can be imported into external_converters easily and without modifications. I do not have a backup of my JavaScript file I used for development over a year ago, so I am stuck with the TypeScript file, that Zigbee2MQTT does not support out of the box.