In this lesson, we're going to learn how we can use
const assertions to implement an enum-style object in TypeScript. We generally don't want widening of any literal types in this object, so we can use a
const assertion. We're also going to compare our enum-style object to a native TypeScript enum.
Thanks for explaining these two:
type ValuesOf<T> = T[keyof T]; // indexed access type - access the types of all properties in this object - type MethodType = ValuesOf<typeof Method>; // Note that HTTPRequestMethod is a value, not a type, so we have to use the typeof operator here.
It is little bit difficult at first sight:)