Aliases for Concatenating Strings in TypeScript
To concatenate strings, you can enter your own type using a given alias. Let's do that:
type message = 'success' | 'error';
Let's declare a variable with our new type:
let str: message;
Let's write some value into this variable:
str = 'success';
Make a data type that will allow a variable to take on one of three values: 'error', 'warning', or 'success'.
