How to write overloads for arrow functions
typescript
The third argument seems to be needed to correlate return/input types with the function body.
const greet: {
(name: string): string
(hellos: number): string
(arg: string | number): string
} = (arg) => {
if (typeof arg === "string") {
return `Hello ${arg}!`;
}
return Array.from(Array(arg)).map(() => "Hello").join(' ');
}
greet("John");
greet(3);
// Outputs:
// Hello John!
// Hello Hello HelloI learnt this from @steveruizok