Essential Books

Very simple proxy using the set trap

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This proxy simply appends the string " went through proxy" to every string property set on the target object. 

let object  = {};

let handler = {
    set(target, prop, value){ // Note that ES6 object syntax is used
        if('string' === typeof value){
            target[prop] = value + " went through proxy";
        }
    }
};

let proxied = new Proxy(object, handler);

proxied.example = "ExampleValue";

console.log(object); 
// logs: { example: "ExampleValue went trough proxy" }
// you could also access the object via proxied.target
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Proxy:
* Proxy
* Very simple proxy using the set trap
* Proxying property lookup
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0 Getting started
1 Comments
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81 Automatic Semicolon Insertion
82 IndexedDB
83 Anti-patterns
84 Navigator Object
85 Modularization techniques
86 Proxy
87 Same origin policy, cross-origin communication
88 postMessage and MessageEvent
89 WeakMap
90 WeakSet
91 Behaviroal Design Patterns
92 Server-sent events
93 Async iterators
94 Namespacing
95 Evaluating JavaScript
96 Memory efficiency
97 How to make iterator usable inside async callback function
98 Context this
99 Setters and getters
100 Vibration API
101 Fluent API
102 Tilde
103 Security issues
104 Get and set CSS custom variables
105 Contributors