How are things with TypeScript? Have you used generics, utility types, TypeGuard?

In working with TypeScript, I actively used generics, utility types, and TypeGuards.

• Generics allow creating reusable components with types specified at usage. For example:

function identity<T>(arg: T): T {
  return arg;
}

• Utility types (such as Partial<T>, Pick<T, K>, Omit<T, K>) help create new types based on existing ones, simplifying type management and increasing safety.

• TypeGuard — these are functions that check the type of a value at runtime and help the compiler narrow down the type. For example:

type Fish = { swim: () => void };
type Bird = { fly: () => void };

function isFish(pet: Fish | Bird): pet is Fish {
  return (pet as Fish).swim !== undefined;
}

function move(pet: Fish | Bird) {
  if (isFish(pet)) {
    pet.swim();
  } else {
    pet.fly();
  }
}

Using these features of TypeScript significantly improves code quality and reduces errors.