How can i outsource functions that use state and do setState

I have a class which has many functions, i wish to outsource these functions and put each group of function inside a file of their own and then use them by importing and calling them.
Usually this is very simple, you simply put the function bodies inside another file and then export them, but in my case i use this.state and this.setState, is it still possible to outsource these function? if not, is there a better practice?
Thank you.