<ul><li>A proxy in JavaScript wraps another object and intercepts interactions with it.</li><li>The Proxy constructor takes a target object and a handler object to define interception behaviors.</li><li>Proxies don't clone the target object but hold a live reference to it, reflecting changes made to the original.</li><li>Handlers define traps for different actions like get, set, has, etc., allowing custom intervention.</li><li>Traps are methods on the handler object called by the engine based on the type of operation.</li><li>Operations on a proxy are routed through checks to determine if a trap should run.</li><li>Traps like get and set intercept property access and value assignments, allowing manipulation or blocking.</li><li>Method calls on a proxy can be intercepted using get for object methods and apply for function proxies.</li><li>The behavior of a proxy remains consistent regardless of its usage, passing operations through defined traps.</li><li>Proxies don't alter the original object but reshape how interactions are handled, providing transparent control.</li></ul>

How Proxies Intercept Behavior in JavaScript Objects

Discover more