Call this.push in Polymer({ }) function from HTML5's geolocation callback

[Abhilash Sathe]

navigator.geolocation.getCurrentPosition(function(position) {
    lat = position.coords.latitude,
            lng = position.coords.longitude;
    this.push('thread.messages', {
    latlong: lat+","+lng,
});

}, function() {
    console.warn('ERROR(' + err.code + '): ' + err.message);
});

In the above, I get an error saying `push` is not a function. How should I handle this?

[Karl Tiedt]

Basic Javascript 101 -- you are inside of a async callback which has no scope to your original method.

In ES6 style...

navigator.geolocation.getCurrentPosition((position) => { /*code here */ });

In Non ES6... (by using a bound method)

navigator.geolocation.getCurrentPosition(this.updateCoords);

Non ES6 v2... (via bind)

navigator.geolocation.getCurrentPosition(function(position) {
lat = position.coords.latitude,
lng = position.coords.longitude;
this.push('thread.messages', {

    latlong: lat+","+lng,

}.bind(this));

}, function() {
console.warn('ERROR(' + err.code + '): ' + err.message);
});

-Karl Tiedt

Follow Polymer on Google+: plus.google.com/107187849809354688692
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[Abhilash Sathe]

var self = this  and then in place of this I used self. Problem Solved ! Yes, scope was the problem.

[Karl Tiedt]

I intentionally left that method out because it is the least correct way to fix the problem anymore.

-Karl Tiedt

Follow Polymer on Google+: plus.google.com/107187849809354688692

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