Hi simonwriteclubdi, welcome to Thunkable! 
Be sure to check out our posts about How to ask Great Questions v2.0, our Community Guidelines, and our Docs as you get started.
As for your question, if there is a setting to change it to display as Javascript, then likely you would be able to do this in Thunkable. I am not familiar with the platform you are using, but I would recommend seeing if “Target: Shell” or “Client: Wiget” can be changed to be in a language that can be used with our WebAPI blocks.