onChange not working?

[Emiliano-Bucci]

Hi to all! I have a question regarding the onChange callback, but i don't know if this is a bug or a normal behavior. I have the following example:

const [style, setStyle] = useSpring(() => ({
    opacity: 0,
  }))

and what i want to do is:

setStyle({
   opacity: 1,
   onChange(val){
     // Do something here
   }
})

the problem is that the onChange callback isn't triggered (it is only triggered if i declare it in the useSpring hook), but i see from types perspective that we can pass the onChange callback, so i don't know what's happening :D I have the latest version of use-spring. Thanks a lot :)