From last few years, JavaScript community has continued to expand its inventions. One of them is the JS 6th Edition, ECMAScript 6. Everyone has probably heard about ES6 and its latest features. Even, the programmers are well-aware of the word “proxy”. These are the middleware for the JS objects which allows custom functionality for fundamental operations. Proxy is a potential tool to make code much simpler and decipherable.
Use of ES6 Proxies in JavaScript - ES6 proxies has an amazing feature that allows the direct access to the function or an object. It is basically meant to provide custom functionality to JS operations. A Proxy can work on any kind of object and almost with any operation. In order to block direct access to functions or object, different traps come in use. These traps are much similar to the JS methods and can be used for the same call. The most common methods calling on an object are - get, apply, and construct. When they are applied to the object, the proxy decides whether to allow you to access target.
Below are the few use cases of Proxy -
• The most common use of ES6 proxies is for validation. Before performing an operation on an object, it accesses the control checks and ensures all the properties are of similar type.
• With proxies, one can achieve strong privacy in JS. It becomes pretty easier to work with private properties in JS. A programmer can explicitly set the property either privately or publically.
• Proxies also support revoking access and target the objects any time. This feature is amazing when someone wants to block an access to certain data.
• It also extends the semantics of operations on an object. With this, one can simply log operations, throw exceptions or transmit processes in different targets.
• These proxies are also beneficial to opt for when events occur in objects. Only with the same method, we can implement the events too.
Irrespective of performance, the ES6 proxy is worthwhile in making the code simpler and legible. In order to resolve the complexities of the JS coding, a proxy can be engaged conveniently. If you are looking for a platform to practice complex codes with ES6 proxies, choose CodeFights. It is an effective application for computer coding practice and equipped for technical interviews preparations.