How do I check if 'key' is correctly populated with 'known' values in JSON file

Question

I am trying to check if a particular key is assigned with only a set of values. This values are listed as an enum in Typescript.

P

Answer 1

Do something like this:

function isValidRegion(candidate: any): candidate is Regions {
      return Object.keys(Regions).some(region => region === candidate)
}