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Explore practical use cases of JavaScript proxies to manage data access, count method calls, optimize function results, and handle client-side validation. Understand how proxies aid automated testing and API call management through exercises focused on revocable proxies and memorization.

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When studying Proxy.revocable, we concluded that we could centralize control of data access via revocable proxies. All we need to do is pass the revocable proxy object to other consumer objects, and revoke their access once we want to make data inaccessible.

In Exercise 1, we will build a proxy that counts the number of times a method was called. Proxies can be used in automated ...