I am reading the following code:
export interface Contact {
contactOptions?: string[];
}
const mapToContact: (
value: Record<string, any>
) => Contact = (value) => {
return {
...
}
};
..and I don't understand of the instruction:
Contact = (value)
What does it mean? 'Contact' is an interface, why is that expression not :
(value: Contact)
I am confused by this function declaration, can anyone help me understand? Thanks
That's part of the interface. => Contact is the functions return type.
You can see it more easily this way:
export interface Contact {
contactOptions?: string[];
}
type MapToContactInterface = (value: Record<string, any>) => Contact;
const mapToContact: MapToContactInterface = (value) => {
return {
}
};
It says the function mapToContact has a return type of Contact.
Formatted:
const mapToContact: // Variable declaration
(value: Record<string, any>) => Contact // Variable type
= (value) => { // Parameter list
return { // Function body
// Function body
} // Function body
}; // Function body
=> Contact part ends the type definition. = (value) starts the type implementation.(value) is a parameter (list) of a function, yes. Edited the answer with an example of how you can format the function to better understand it.