JS Built-ins
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ObjectObject.getOwnPropertySymbolsintermediate

Object.getOwnPropertySymbols() — returns Symbol keys

📖 Usage Example
// Get all Symbol-keyed properties
const sym = Symbol('id')
const obj = { [sym]: 1, name: 'Alice' }
Object.getOwnPropertySymbols(obj)   // → [Symbol(id)]

Use Object.getOwnPropertySymbols() to retrieve all symbol-keyed own properties, which are invisible to Object.keys().

Object.getOwnPropertySymbols()

Object.getOwnPropertySymbols(obj) returns an array of all own Symbol-keyed properties. Symbols are not returned by Object.keys or Object.getOwnPropertyNames.

Challenge: Implement getSymbolKeys(obj) that returns the Symbol-keyed properties of obj.

const s = Symbol('key')
getSymbolKeys({ [s]: 1 }) // → [s]
💡 Hints (1)
  • • `Object.getOwnPropertySymbols` is the Symbol counterpart of `Object.getOwnPropertyNames`.