interface MyInterface {
(choose: string): number;
(item: number): string;
}
Can you provide guidance on using the MyInterface interface mentioned above? How would it be helpful in practical situations?
interface MyInterface {
(choose: string): number;
(item: number): string;
}
Can you provide guidance on using the MyInterface interface mentioned above? How would it be helpful in practical situations?
When a function has more than one signature, it's referred to as overloading.
For instance:
interface MyInterface {
(select: string): number;
(element: number): string;
}
let fn: MyInterface;
fn = (obj): any => {
// do something
return null;
}
let str = fn(3); // type of str is string
let num = fn("string"); // typeof num is number
let error = fn(false); // error as false is neither string nor number
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