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Syntax · medium

22. Destructuring & Deep Cloning

Nested destructuring, shallow copies, and structuredClone.

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Spread syntax (`{ ...obj }`) creates a shallow copy. Modern JavaScript provides `structuredClone()` for native, deep cloning of objects without JSON serialization hacks.

js
const original = { a: 1, b: { c: 2 } };
const deep = structuredClone(original);

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  1. 1. What is the standard native method for deep copying objects?

  2. 2. What happens to nested objects with spread syntax {...obj}?

  3. 3. Can structuredClone handle cyclic object references?

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