javascript causes an error when dealing with geo location

Question

So I'm working on a school project by using google maps, and I want to get my position aswell. However, when I run my script: http://pastebin.com/1kU5DSe0

I get this error: Uncaught TypeError: Cannot set property 'lat' of undefined (on line 15)

Does anyone see what I'm doing wrong? :/

Answer 1

On the updateLocation function, you need to use this.pos.lat instead of GeoManager.pos.lat :

GeoManager.prototype.updateLocation = function (position) {
    this.pos.lat = position.coords.latitude;
    this.pos.lng = position.coords.longitude;

    console.log(this.pos);
};

EDIT: I didn't notice this before, but since you're passing in this.updateLocation as the call back of getCurrentPosition , the context of this is different, which means this.pos.lat will be

navigator.geolocation.getCurrentPosition(this.updateLocation.bind(this));

Updated JSFiddle Example