How to compare Enums in TypeScript

Question

In TypeScript, I want to compare two variables containing enum values. Here\'s my minimal code example:

enum E {
  A,
  B
}

let e1: E = E.A
let e2: E = E.B

if (         


        

Answer 1

In typescript an example enum:

enum Example {
   type1,
   type2
};

is transformed to javascript into this object:

Example {
    '0': 'type1', 'type1': 0,
    '1': 'type2', 'type2': 1
}

I had many problems with comparison enums in typescript. This simple script solves the problem:

enum Example {
    type1 = 'type1',
    type2 = 'type2'
};

then in javascript, the object is transformed into:

Example {
    'type1': 'type1',
    'type2': 'type2'
}

If you don't need to use enums - it's better not to use. Typescript has more advanced types, more here: https://www.typescriptlang.org/docs/handbook/advanced-types.html You can use instead:

type Example = 'type1' | 'type2';