All challenges
Multiple ChoiceIntermediate 30s

Object.is Equality

Choose the best answer for: Object.is()
Options
  1. 1Object.is is same as ===
  2. 2Object.is is deprecated
  3. 3Object.is(NaN, NaN) is true
  4. 4Object.is(-0, +0) is true

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