Proxy intercepts object operations. Reflect provides methods for those operations. Here's how to use them.
Basic Proxy
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Validation
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Property Access Control
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Default Values
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Reactive System
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Logging and Debugging
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Function Proxy
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Reflect API
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Revocable Proxy
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Array Proxy
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Type Coercion
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Best Practices
Usage:
✓ Use Reflect with Proxy handlers
✓ Return true from set traps
✓ Handle all necessary traps
✓ Consider revocable for access control
Performance:
✓ Avoid proxying hot paths
✓ Cache proxy instances
✓ Use direct access when possible
✓ Profile proxy overhead
Patterns:
✓ Validation and sanitization
✓ Change detection
✓ Access logging
✓ Default values
Conclusion
Proxy and Reflect enable powerful metaprogramming in JavaScript. Use Proxy for validation, reactivity, logging, and access control. Always use Reflect methods in handlers for correct behavior with inheritance and receivers.