All challenges
Multiple ChoiceIntermediate 30s

Private Variables

Choose the best answer for: private data in JS (pre-#)
Options
  1. 1All object properties are private by default in JavaScript
  2. 2Closures can create truly private variables in pre-ES2022 JS
  3. 3Private variables require TypeScript and are impossible in JS
  4. 4JavaScript has no privacy mechanism at all for object state

Think you can answer under pressure?

Get matched and answer live questions in 3-minute 1v1 battles. Elo ranking, badge tiers and bragging rights on the line.

Play this in a 3-minute battle