The Object getOwnPropertySymbols() method

Find out all about the JavaScript getOwnPropertySymbols() method of the Object object

Get an array of symbols defined on an object.

Symbols are an ES2015 feature, and this method was introduced in ES2015 as well.

Example:

const dog = {}
const r = Symbol('Roger')
const s = Symbol('Syd')
dog[r] = {
  name: 'Roger',
  age: 6
}
dog[s] = {
  name: 'Syd',
  age: 5
}

Object.getOwnPropertySymbols(dog) //[ Symbol(Roger), Symbol(Syd) ]