What is the purpose of the $proxy method in jQuery?

The $.proxy method takes an existing function and returns a new one with a particular context. This method is often used for attaching events to an element where the context is pointing back to a different object. Tip: If you bind the function returned from $.proxy, jQuery will still unbind the correct function if passed the original.

What is a dynamic proxy in JavaScript?

(Under construction) The Proxy API enables the creation of dynamic proxies in Javascript. Dynamic proxies are useful for writing generic object or function wrappers or for creating virtual object abstractions. To avoid any confusion: these proxies have nothing to do with web proxy servers.

How do I know if a JavaScript object is a proxy?

According to the Javascript language specifications, there is no way to determine if an Object is a Proxy. However, on Node 10+ it is possible using the util.types.isProxy method. What’s the target? Given a Proxy object, it’s not possible to obtain or change the target object. It is also not possible to obtain or modify the handler object.

What happens if jQuery context is null or undefined?

As of jQuery 1.9, when the context is null or undefined the proxied function will be called with the same this object as the proxy was called with. This allows $.proxy () to be used to partially apply the arguments of a function without changing the context.