What is the use of Proxy and Reflect in JavaScript?

I have read the documentation for Proxy and Reflect on MDN but didn't understand much. Can anyone please explain or mention the real world use of these ES6 features.

One of the good use of proxy I found is that we can declare our object values as private -

const object = {
    name: "Rajesh Royal",
    Age: 23,
    _Sex: "Male"
}

const logger = {
    get(target, property){
        if(property.startsWith("_")){
            throw new Error(`${property} is a private property.`);
        }

        console.log(`Reading the property ${property}`);
        return target[property];
    }
}

const Logger = new Proxy(object, logger);

// now if you try to access the private property it will throw an error
Logger._Sex

Uncaught Error: _Sex is a private property.
    at Object.get (<anonymous>:4:19)
    at <anonymous>:1:8

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What is the use of Proxy and Reflect in JavaScript?

Rajesh Royal

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