Bits of .NET

Frameworks like Vue use Proxy for reactivity. You can too – update UI automatically when data changes.

Basic Reactive Object:

const data = {
    count: 0,
    name: 'John'
};

const reactive = new Proxy(data, {
    set(target, property, value) {
        target[property] = value;
        
        // Update UI automatically
        document.getElementById(property).textContent = value;
        
        console.log(`${property} changed to ${value}`);
        return true;
    }
});

// Usage
reactive.count = 5;  // UI updates automatically!
reactive.name = 'Jane';  // UI updates automatically!

Validation:

const validated = new Proxy({}, {
    set(target, property, value) {
        if (property === 'age' && (value < 0 || value > 150)) {
            throw new Error('Invalid age');
        }
        target[property] = value;
        return true;
    }
});

validated.age = 25;  // OK
validated.age = -5;  // Error!

Build reactive systems without framework overhead!