illegal invocation

[sacrosanctic]

Why doesn't it work? Isn't randomUUID a function?

// does work
times(()=>crypto.randomUUID(),5)

// doesnt work
times(crypto.randomUUID,5)

repro

[Matthias Seemann]

Isn't randomUUID a function?

No, in the browser it is not a free static function, but needs to be bound to crypto:

// works in the browser — does not work in Nodejs
times(crypto.randomUUID.bind(crypto), 5);

Funnily enough, in Nodejs crypto.randomUUID is a free static function, but your example won't work there either. This is because — if called with an argument — it expects that optional argument to be an object.

You'll get another error message

TypeError: The "options" argument must be of type object. Received type number (0)

It's still an awful mess trying to write isomorphic JavaScript. (Mostly the messy browser apis imo)

Btw. same issues with console.log

😵‍💫

Supplement:
On the other hand JSON.parse again is static in the browser.

Who decides that stuff anyway, and why? It's massively annoying for FP: there seems to be no scheme.

[sacrosanctic]

Thanks for the detailed answer, I was not aware of a free static function. What kind of function is crypto.randomUUID on the browser if it is not a free static function?

[Matthias Seemann]

@sacrosanctic

What kind of function is crypto.randomUUID on the browser if it is not a free static function?

A "method for the crypto namespace" perhaps?

All I know is that in C++ one calls functions which are provided by objects and operate on their (private) data "methods". In JS that would apply to functions which use this in their implementation. So perhaps randomUUID somehow needs this ≡ crypto to work. 🤔

[Kevin Wallace]

ty for the explanation @semmel