Client: "Can you make this totally dynamic function calling system 100℅ fault-proof?"
Me: "Hell yeah, hold my coffee"

If you know that the variable has been declared 100% you can just check if it's a truthy value which is anything but these

null
undefined
NaN
empty string ("")
0
false

So if (car) then
//Statement

Thought it may be useful knowledge!

@BoyBiscuit Thank you for the advice, but the function's name comes from a DB and it's for an input generator, so i need to parse bad references :/

@Stokka oh that's fine I didn't the
Think it would be applicable :)

I laughed so hard xD xD xD