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On the Design of the ECMAScript Reflection API

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Executive Summary

The authors describe in detail the new reflection API of the upcoming Javascript standard. The most prominent feature of this new API is its support for creating proxies: virtual objects that behave as regular objects, but whose entire "Meta-object protocol" is implemented in Javascript itself. Next to a detailed description of the API, they describe a more general set of design principles that helped steer the API's design, and which should be applicable to similar APIs for other languages.

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