Assign param as one value of TS enum?

Question

I have a Typescript enum...

enum Animals {
  CAT = 'cat',
  DOG = 'dog',
  FISH = 'fish'
}

I have a function who's parameter can be one of the values of the enum. How do I type that??

function getAnimal (param: ValueOf<Animal>) {
  return 'Your animal is a ' + param; 
}

The goal is for me to be able to export this function elsewhere in my code, and get the intellisense to say that param can be 'cat'|'dog'|'fish'

https://stackoverflow.com/questions/52393730/typescript-string-literal-union-type-from-enum — Psidom, Aug 02 '20 at 17:52
Thanks! I didn't know what key words to use to ask this question, even though I was sure I wasn't the first to ask it. — TJBlackman, Aug 02 '20 at 18:01

score 2 · Accepted Answer · answered Aug 02 '20 at 17:51

2

enum Animals {
  cat = 'cat',
  dog = 'dog',
  fish = 'fish'
}

function getAnimal (param: keyof typeof Animals) {
  return 'Your animal is a ' + param; 
}

answered Aug 02 '20 at 17:51

critrange

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Assign param as one value of TS enum?

1 Answers1