JS proxy mode

//  The rent paid by the user 
class Money {
    
    constructor(money) {
    
        this.money = money
    }
}

//  tenant   Source object 
class User {
    
    constructor(name, money, target) {
    
        this.name = name
        this.money = money
        this.target = target
    }
    //  pay 
    payMoney() {
    
        const m = new Money(this.money)
        this.target.receiveMoney(m.money) // You can use it directly this.money
    }
}

//  landlord or landlady   Target audience 
class HouseOwner {
    
    constructor(name) {
    
        this.name = name
    }
    //  Collect money 
    receiveMoney(money) {
    
        console.log(" landlord or landlady : I received the rent " + money);
    }
}

//  The mediation   Acting as landlord to collect rent 
class ProxyHouseOwner {
    
    constructor() {
    
        this.target = new HouseOwner("xx Apartment ")
    }
    //  pay 
    payMoney(money) {
    
        this.target.receiveMoney(money)
    }
    //  Collect money 
    receiveMoney(money) {
    
        this.payMoney(money)
    }
}

const dl = new ProxyHouseOwner()
const xm = new User(' Xiao Ming ', '1100', dl)
const xh = new User(' Xiaohua ', '2000', dl)
xm.payMoney()  	// landlord or landlady : I received the rent 1100
xh.payMoney()  	// landlord or landlady : I received the rent 2000

//  star 
const star = {
    
    name: ' Stephen Chow ',
    age: '55',
    phone: [phone]
}

// agent 
const agent = new Proxy(star, {
    
    get: (target, key) => {
    
        if (key === "phone") {
    
            return 17311112222
        }
        return target[key]
    },
    set: (target, key, val) => {
    
        if (val < 100000) {
    
            throw new Error(' The price is too low ')
        } else {
    
            target[key] = val
        }
    }
})
console.log(agent.name);
console.log(agent.age);
console.log(agent.phone);
agent.price = 1000000
console.log(agent.price);