The Reflect API provides methods for interceptable JavaScript operations, making it essential for Proxy implementations. Here's how to use it.
Basic Methods#
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Property Operations#
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Prototype Operations#
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Function Calls#
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Constructor Calls#
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With Proxies#
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Validation Proxy#
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Observable Objects#
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Access Control#
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Lazy Initialization#
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Method Interception#
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Extensibility Control#
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Best Practices#
Usage:
✓ Use with Proxy traps
✓ Maintain default behavior
✓ Handle return values
✓ Forward receiver properly
Benefits:
✓ Consistent return values
✓ Matches Proxy trap signatures
✓ Better than Object methods
✓ Works with primitives
Patterns:
✓ Validation proxies
✓ Observable objects
✓ Access control
✓ Method interception
Avoid:
✗ Ignoring return values
✗ Forgetting receiver
✗ Using when unnecessary
✗ Breaking invariants
Conclusion#
The Reflect API provides methods that correspond to Proxy trap operations, making proxy implementations cleaner and more reliable. Use Reflect.get, Reflect.set, and other methods in proxy handlers to maintain default behavior while adding custom logic. The consistent return values and proper receiver handling make Reflect essential for meta-programming in JavaScript.