Typescript enum

typescript_enum.ts

// String
enum Family {
  Mom = 'M',
  Daddy = 'D',
  Brother = 'B',
}

const indexOf = Object.values(Sizes).indexOf('M' as unknown as Family);

const key = Object.keys(Family)[indexOf];
console.log(key); // "Mom"

// Numeric
enum FamilyNum {
  Mom,
  Daddy,
  Brother,
}

console.log(SizesNumeric[0]); // "Mom"
console.log(SizesNumeric[1]); // "Daddy"

enum Family {
  Mom = 'M',
  Daddy = 'D',
  Brother = 'B',
}

console.log(Object.keys(Sizes));
// ['Mom', 'Daddy', 'Brother']

console.log(Object.values(Sizes));
// ['M', 'D', 'S']

enum Family {
  Mom = 'M',
  Daddy = 'D',
  Brother = 'B',
}

function getKeyByValue(value: string) {
  const index = Object.values(Family).indexOf(value as unknown as Family);

  const key = Object.keys(Family)[index];

  return key;
}

console.log(getKeyByValue('M')); // Mom
console.log(getKeyByValue('D')); // Daddy