Frontend · Junior · Theory

How does prototypal inheritance work in JavaScript?

~4 min by voice

How to approach it

The interviewer checks whether the candidate understands the mechanism under the hood: the [[Prototype]] reference, property lookup along the chain, and the relationship between a constructor, prototype and new, not just the class/extends syntax.

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Topics

javascript prototypes

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Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

Best with headphones · ~4 min