The structuredClone function creates deep copies of values using the structured clone algorithm. Here's how to use it.
Basic Usage#
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Supported Types#
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Circular References#
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Non-Cloneable Types#
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Transfer Option#
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Comparison with Other Methods#
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Practical Examples#
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Error Handling#
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Performance Considerations#
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Best Practices#
Usage:
✓ Use for deep cloning objects
✓ Use for immutable state updates
✓ Use when preserving types matters
✓ Use for complex nested structures
Benefits:
✓ Handles circular references
✓ Preserves Date, RegExp, Map, Set
✓ Native browser/Node.js support
✓ No external dependencies
Limitations:
✗ Cannot clone functions
✗ Cannot clone Symbols
✗ Cannot clone DOM nodes
✗ Loses prototype chain
Avoid:
✗ Using for shallow copies
✗ Cloning objects with functions
✗ Performance-critical loops
✗ When JSON suffices
Conclusion#
The structuredClone API provides native deep cloning with support for complex types like Date, RegExp, Map, and Set. Use it for immutable state management, caching, and any scenario requiring true deep copies. Remember it cannot clone functions, symbols, or DOM nodes, and consider performance for hot paths.