Challenge: Solution Review

class Applications{
    constructor(name, type){
        this.name = name
        this.type = type
    }
    display(){}
    displayMode(){}
}
class Mode{
    constructor(app){
        this.app = app
        this.lightMode = function(){
            this.app.setLightMode()
        }
        this.darkMode = function(){
            this.app.setDarkMode()
        }
    }
}
class Facebook extends Applications{
    constructor(name,type){
        super(name,type)
        this.mode = "light"
        this.setLightMode = function(){
            this.mode = "light"
        }
        this.setDarkMode = function(){
            this.mode = "dark"
        }
    }
    display(){
        console.log(`Welcome to Facebook for ${this.type}.`)
    }
    displayMode(){
        console.log(`You are using facebook in ${this.mode} mode.`)
    }
}
class WhatsApp extends Applications{
    constructor(name,type){
        super(name,type)
          this.setLightMode = function(){
            this.mode = "light"
        }
        this.setDarkMode = function(){
            this.mode = "dark"
        }
    }
    display(){
        console.log(`Welcome to Whatsapp for ${this.type}.`)
    }
    displayMode(){
        console.log(`You are using whatsapp in ${this.mode} mode.`)
    }    
}
const fb = new Facebook("Facebook", "Social Networking")
const mode = new Mode(fb)
mode.darkMode()
fb.displayMode() 
  
const whatsapp = new WhatsApp("Whatsapp", "Chatting")
const mode2  = new Mode(whatsapp)
mode2.lightMode()
whatsapp.displayMode()

class Applications{
    constructor(name, type){
        this.name = name
        this.type = type
    }
    display(){}
    displayMode(){}
}
class FacebookLightMode extends Applications{
    constructor(name,type){
        super(name,type)
    }
    display(){
        console.log(`Welcome to Facebook for ${this.type}.`)
    }
    displayMode(){
        console.log("You are using facebook in light mode.")
    }
}
class FacebookDarkMode extends Applications{
    constructor(name,type){
        super(name,type)
    }
    display(){
        console.log(`Welcome to Facebook for ${this.type}.`)
    }
    displayMode(){
        console.log("You are using facebook in dark mode.")
    }
}
class WhatsAppLightMode extends Applications{
    constructor(name,type){
        super(name,type)
    }
    display(){
        console.log(`Welcome to Whatsapp for ${this.type}.`)
    }
    displayMode(){
        console.log("You are using whatsapp in light mode.")
    }    
}
class WhatsAppDarkMode extends Applications{
    constructor(name,type){
        super(name,type)
    }
    display(){
        console.log(`Welcome to Whatsapp for ${this.type}.`)
    }
    displayMode(){
        console.log("You are using whatsapp in dark mode.")
    }    
}
const fbLight = new FacebookLightMode("Facebook", "Social Networking")
const whatsappDark = new WhatsAppDarkMode("Whatsapp", "Chatting")
fbLight.display()
fbLight.displayMode()
whatsappDark.display()
whatsappDark.displayMode()