Welcome back! Today I show you the Literal Types.
This feature permits you to create a set of relationship values.
type Direction = "North" | "South" | "East" | "West";
Literal types in this case create also a Type Guard of your field, so the compiler can detect your errors or your typos.
let directionError: Direction = "east" // Type '"east"' is not assignable to type 'Direction' let direction: Direction = "East" // OK
You can create Literal Types from different types such as booleans, numbers, and strings, and you can combine together different types too.
type Valid = false | 0 | true | 1;
That's all for today See you soon guys!