Creating type aliases

Understanding the need for type aliases #

In the last lesson, we created an object type to hold a name and a score:

const tomScore: { name: string; score: number; } = { name: "Tom", score: 70 };
const bobScore: { name: string; score: number; } = { name: "Bob", score: 80 };
const janeScore: { name: string; score: number; } = { name: "Jane", score: 90 };

Wouldn’t the code be more readable if we could somehow name { name: string; score: number; } and use that name:

const tomScore: Score = { name: "Tom", score: 70 };
const bobScore: Score = { name: "Bob", score: 80 };
const janeScore: Score = { name: "Jane", score: 90 };

Well, this is exactly what a type alias is!