TypeScript enum to union

TIL you can make a union type for TypeScript enums by just… Interpolating it. I’m probably the last one to find out, but in case I’m not, check this example.

enum Example {
  First = 'first',
  Second = 'second',
  Third = 'third',
}

// "first" | "second" | "third"
type ExampleValueType = `${Example}`;

This is useful when you want to for example have a db entity’s property be one of an enum’s values without using an enum type.