Enumerated data types (enums) are a set of numeric values with more friendly names. It's an addition on top of JavaScript that TypeScript offers. code example

Example 1: typescript enum to string

enum AnEnum {
    One = 1,
    Two = 2
}
let stringOne = AnEnum[1]; // "One"
let stringTwo = AnEnum[AnEnum.Two]; // "Two"

Example 2: enum to number typescript

enum UserResponse {
  No = 0,
  Yes = 1,
}
console.log(UserResponse.Yes) //logs : 1