A JavaScript proxy object lets you intercept and customize the behavior of another object, without modifying the original.
This created object can redefine core operations such as getting, setting, and defining properties.
you could also use these proxy objects to log property accesses and validate, format, or sanitize inputs.
The handler object contains two properties,getandset.
These properties are known as traps.
A proxy object trap is a function called whenever you perform a specified action on a proxy object.
Traps allow you to intercept and customize the behavior of the proxy object.
Finally, the code creates a proxy object with theProxyconstructor.
It passesoriginalObjectandhandleras the target object and handler, respectively.
Using Proxy Objects
Proxy objects have several uses in JavaScript, some of which are as follows.
This code block adds functionality via the proxy traps,getandset.
you’re free to do so by defining the validation logic in asettrap in thehandlerobject.
This code block adds validation rules to thesettrap.
you could assign any value to theageproperty on auserObjectinstance.
Do so by defining restriction logic ingettraps for the properties you want to control access to.
The code block above adds certain restrictions to thegettrap.
Initially, you might access all available properties onuserObject.
The added rules prevent access to sensitive information such as the users email or phone.
Trying to access either of these properties will trigger an error.
But they also have some potential drawbacks.
One such drawback is difficulty debugging, as it can be hard to see whats happening behind the scenes.
Proxy objects can also be difficult to use, especially if you are unfamiliar with them.
You should carefully consider these drawbacks before using proxy objects in your code.
