I've come across this particular syntax in a few Typescript libraries and I am trying to grasp its meaning.
error?: (error: T) => void
I have seen it being used like so:
class SomeClass {
someFunction(error?: (error: T) => void){
}
}
I understand that error? signifies an optional error parameter, but I'm unsure about the :(error: T) =>void part. Normally, you would declare the parameter type immediately after the :.
Thank you
S
Right: situation? indicates that it is not mandatory
Now, let's break down the rest:
: (situation: S) => void
: - signifies that you are specifying the type
(situation: S) - suggests that it is a function
situation: S - denotes that it accepts an argument situation of type S
=> void - indicates that the function returns void (no output)
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