TypeScript Lookup Types

🌱 This post is in the growth phase. It may still be useful as it grows up.

type Post = {
  title: string;
  publishDate: Date;
  tags: string[];
};

let tags = ["Barbie", "Ken", "Alan"]: Post["tags"];
let tag = "test": Post["tags"][0];
tags; // string[]
tag;  // string