Deep Clone

Challenge summary

Create an independent copy of nested JavaScript data while preserving supported value types and shared references.

What you'll practice

• Clone nested objects and arrays without retaining mutable source references.
• Preserve supported built-in value types such as dates and regular expressions.
• Reason about repeated references, circular data, and unsupported values.

What Premium unlocks

Premium unlocks the runnable workspace, behavioral checks, implementation walkthrough, and edge-case discussion.