correct-destructure.ts

const person = { first: 'John', last: 'Doe' };

/* -- Correct TypeScript Functional Destructure -- */
// Define a 'Person' interface with the shape of 
// the expected Person object argument
interface Person {
  first: string;
  last: string;
}

// define that the structure of the argument being destructed
// should match the object schema of the Person interface
const hello = ({ first, last }: Person) => 
  `Hello ${first} ${last}!`;

// outputs "Hello John Doe!"
hello(person);

Thank you!