Check if string exist in const typescript

Issue

I have some const like this

export class CustomerType {
  static readonly main = 'mainCustomer';
  static readonly additional = 'additionalCustomer';
}

And I have

const value = 'main'

Is it possible to check does value exist in CustomerType and return true or false? I know that I can use include when is an array but this is class?

Solution

You can use Object.keys() to get all properties on the class and then use Array.prototype.includes() to see if it is contained:

class CustomerType {
  static readonly main = 'mainCustomer';
  static readonly additional = 'additionalCustomer';
}

const value = 'main'


console.log(Object.keys(CustomerType).includes(value))

You can see this working in the typescript playground.

Answered By - Alexander Nied