JS Proxy

proxyExample.js

// Example of Proxy in JS
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

class Target{
    log(msg){
        console.log(msg)
        
        return msg
    }
}

const target = new Target()


const handler = {
    get: (target, name, receiver)=>{
        return (...args)=>{
            if (typeof target[name] === 'function') {
                console.log(`Proxied! ${target[name](...args)}`)
                
            }else{
                return Reflect.get(target, name, receiver)
            }
        }
    }
}

const myProxy = new Proxy(target, handler)

// myProxy.log("This")
// myProxy.log(1)


const validator ={
    get: (target, name, receiver)=>{
        return (...args)=>{
            if(name === "log" && typeof(args[0]) !== String ){
                console.log(`Error: Must provide a string!`)
            }
        }
    }
}

const validatedProxy = new Proxy(myProxy, validator)

validatedProxy.log("asdfasd")