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.