Does it work in TypeScript too?

[LukasMolka]

It could be that I'm missing something but it doesn't work for me because the it needs the parameter, which is called "person" in your example and it is not set.

[warerebel]

I use it with Typescript, but have to add my own definition file. I'll try to make a pull request on definitelyTyped this week so that you can install @types/xml-flow

[warerebel]

Just FYI, pull request raised https://github.com/DefinitelyTyped/DefinitelyTyped/pull/50841 Once accepted you can npm install @types/xml-flow to use with typescript.