The get trap is executed when we retrieve a property value using the dot or bracket notation, or the Reflect.get() method. It takes three parameters--that is, the target object, the property name, and the proxy.
It must return a value that represents the property value. Here is a code example, which shows how to use the get trap:
const proxy = new Proxy({ age: 12 }, { get(target, property, receiver) { if(property in target) { return target[property]; } return "Property not found!"; } }); console.log(proxy.age); console.log(proxy.name);
The output, as you might've figured out, is as follows:
12Property not found!
Instead of the output, you will get the following without proxies:
12undefined
