CODEWITHSUNDEEP
javascriptnode.jses6-class
Yassine B.
Yassine B.

Reputation: 41

TypeError: "method" is not a function

I'm currently trying to develop a small game in NodeJS to learn ES6. I created a "Player" object with the new syntax. The static functions work perfectly. However, calling its methods throws a TypeError

(ex : TypeError: socket.handshake.session.player.joinRoom is not a function).

I don't understand why because I did the same thing I saw on several tutorials. Since joinRoom is a setter, I tried to add 'set' before the declaration but I got the same problem. Here's my code

Player.js

class Player{
    constructor(name){
        this.id = Player.setID()
        this.name = name
        this.currentRoom = ""
        this.isOwner = false
        this.cards = {}

        Player.list[this.id] = this
    }

    joinRoom(code){
        this.currentRoom = code
    }
    makeOwner(){
        this.isOwner = true
    }
    static setID(){
        if(Player.list.length === 0){
            return 1
        }else{
            return Player.list[Player.list.length - 1].id + 1
        }
    }
}

Player.list = []

module.exports = Player

app.js

// socket.handshake.session.player is initialized with "new Player(playerName)" 
socket.on("creatingroom", function(maxPlayers){
    console.log(socket.handshake.session.player)
    // Returns {id: 1, name: 'chosenName', currentRoom: '', isOwner: false, cards: {}}
    var room = new Room(maxPlayers)
    socket.handshake.session.player.joinRoom(room.code)
    socket.handshake.session.player.makeOwner()
})

Thanks for your help

Upvotes: 4

Views: 926

Answers (1)

Cylpios
Cylpios

Reputation: 186

While the object you are working with seems to have all the properties of the player, it looks as if it does not inherit from the Player class. You could create a new Player from that object though : 

const player = Object.assign(new Player('Name'), socket.handshake.session.player);
player.joinRoom(12);
player.makeOwner();
console.log(player);

Now as player is a real Player instance, you can now call methods on it.

Upvotes: 2

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