Check if value is a Solid signal

[magicmatatjahu]

HI! I am wondering if there's a possibility to check if value passed to function is a Solid signal. As I see, all getter of signal is a bounded readSignal function, however, it's not possible to check the original function from the getter. E.g. Angular provides a function isSignal and based on that, you can read the state from the signal by calling it or through the function untracked - if you want to get out of reactivity system.

Background: I'm writing SolidJS integration for my library, and in 99% of cases my API won't need reactivity (because the function result should be 99% static across component), whereas if a signal is used as argument (via a getter reference, not a value) the function result could be changed to a signal (based on TS overload types).

Atm I can do it in this way, to override native .bind function:

let readSignalFn
function recognizeSignal() {
  const realBind = Function.prototype.bind;
  Function.prototype.bind = function (...args: any[]) {
    const result = realBind.apply(this, args as any);
    result.original = this;
    return result;
  }

  const [get] = createSignal()
  readSignalFn = get.original
}

recognizeSignal()

function isSignal(maybeSignal) {
  return maybeSignal.original === readSignalFn;
}

but it's very ugly solution, because all .bind calls in code will have an above side effect and also recognizeSignal function needs to be called before any previous code.

If a similar question has already been asked before, sorry for unnecessary post and would ask for a link to the discussion/issue, thanks!