I'm using Socket.io's callback function, like this:

loadData(callback) {

var client = new SyncClient(this.socket, this.project);
this.client = client; //Data function from me

    client.on("connected", () => {
        this.values ​​= client.getData();
        callback(client);
    }
}

But when I call my function loadData, this error message appears in the console: Uncaught TypeError: callback is not a function.

I think callback() is trying to call it's parent which is a function created inside client.on instead of loadData( callback)? Or does the problem lie elsewhere?

Call my loadData() like this in my mounted:

mounted() {
    this.loadData(this.client)
}