In #Angular Typed Forms, the `get` method takes a string with dot-separated control names, and returns a fully typed value. How is this possible?

We can actually parse the argument at compile time, using the magic of #TypeScript template literal types! Let's see how it works. 🧵 Imagine you have a type listing various products, and you want to automatically generate a type for corresponding database columns.

We define a template literal type called DatabaseColumn. It takes any subtype of string, and maps each element onto a string with a column prefix.