Consider providing callback transfers to update the value.

[teleskop150750]

Starting an untrack, combined with updating a value based on a predicted value, can be a very useful feature.

// ref api (Vue example)
const count = shallowRef(0)

watchEffect(() => {
  foo.value;
  // the function is executed when updating count
  count.value +=1
})

// signal api
const [count, setCount] = createSignal(0)

watchEffect(() => {
  foo();
  // updating count does not trigger a function call
  // oldValue => raw old value
  setCount((oldValue) => oldValue + 1)
})

Example vue fix

[Shinigami92]

I understand what you mean

Does #20 fix it already for the UnSignal?

But yes, this needs definitely to be fixed for unWatch! I found that while starting on #16

@teleskop150750 are you open for helping us on that part?