https://medium.com/dailyjs/how-to-use-javascript-proxies-for-fun-and-profit-365579d4a9f8
With JavaScript proxies you can wrap an existing object and intercept any access to its attributes or methods. Even if they do not exist!
With JavaScript proxies you can wrap an existing object and intercept any access to its attributes or methods. Even if they do not exist!
Medium
How to use JavaScript Proxies for Fun and Profit
There’s a very recent new feature of the JavaScript language that is still not being widely used: JavaScript proxies.