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    Customize Assignment Behavior with a Proxy Handler

    javascriptJavaScript

    Proxies allow you to hijack the default process of assigning a value to a property on an object. Create a Proxy and link the object you want to proxy to the handler then you can define the behavior inside of a set function on the handler. The simplest example is to create a logging behavior which would log out the previous and next values before the value has changed.