In TypeScript you can create a new name or type alias for any type that already exists.
// type alias naming an object type
type MyLocation = {
longitude: number;
latitude: number;
}
function getCoordinates(geo: MyLocation) {
console.log(
`The longitude is ${geo.longitude} and the latitude is ${geo.latitude}.`,
)
}
getCoordinates({ longitude: 203, latitude:759 })
// type alias naming a union type
type AlphaNumeric = string | number;
let id: AlphaNumeric = 32;