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What are common failure modes of Prototype Chain and Inheritance?
What are common failure modes of Prototype Chain and Inheritance?
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Quick interview answer
Common failures around Prototype Chain and Inheritance: blocking the hot path, ignoring backpressure, and weak timeout/retry design. Confusing __proto__ with prototype property on functions; shadowing constructor incorrectly.
Detailed answer
Failure modes for Prototype Chain and Inheritance: Known pitfalls: Confusing __proto__ with prototype property on functions; shadowing constructor incorrectly. • Missing timeouts / unbounded retries • No backpressure when downstream slows • Assuming ordering/guarantees the runtime does not provide How seniors prevent them: Prefer class extends for readability; use Object.hasOwn for own props vs inherited. Parent context: Mitigate first, then root-cause. Check symptoms against: Confusing __proto__ with prototype property on functions; shadowing constructor incorrectly..
Full explanation
Name concrete failure modes and the mitigation for each — that scores higher than a vague “it can fail.” Objects delegate property lookup via [[Prototype]]. Constructor.prototype is shared by instances. class is syntactic sugar over prototypes; methods live on prototype.
Follow-up questions
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Parent context — Prototype Chain and Inheritance
Mitigate first, then root-cause. Check symptoms against: Confusing __proto__ with prototype property on functions; shadowing constructor incorrectly..
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