Using types & having type definitions

[Matthbo]

Why does this project have typescript in the name and uses .ts files when all the basic features & advantages of typescript aren't even used?
Could as well just call it GA4-Measurement-Protocol-Javascript or to be more precise GA4-Measurement-Protocol-ES4, since ES5+ features supported in all modern browsers and Node.js for almost 10 years haven't even been used

For starters we could set types on all the variables and functions.
Instead of having variables assigned in a main function by using this.varname we could use TS's class definition.
Then when you compile it via the tsc it would not only be type safe and friendly in source but also generate the usage definition files for you.