jQuery jQuery.proxy()

This method is most useful for attaching event handlers to an element where the context is pointing back to a different object. Additionally, jQuery makes sure that even if you bind the function returned from jQuery.proxy() it will still unbind the correct function if passed the original.

Be aware, however, that jQuery’s event binding subsystem assigns a unique id to each event handling function in order to track it when it is used to specify the function to be unbound. The function represented by jQuery.proxy() is seen as a single function by the event subsystem, even when it is used to bind different contexts. To avoid unbinding the wrong handler, use a unique event namespace for binding and unbinding (e.g., "click.myproxy1") rather than specifying the proxied function during unbinding.

As of jQuery 1.6, any number of additional arguments may be supplied to $.proxy(), and they will be passed to the function whose context will be changed.

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.