JavaScript - cannot call my object's methods

Question

I am developing a PhoneGap application for Android OS. I want to my application to be designed as most extendable as possible. Therefor I am writing all my modules as plgins, save them in one map and then I would like to use them in my HTML page. I wrote this code in MyJS.js file:

var map = {};

// Allow jQuery to cash the cordova.js
$.ajaxSetup({  cache: true});

$.getScript("cordova-2.6.0.js",function(){

    var AccelerometerSensor = {
            accelJSONObj:cordova.require("cordova/plugin/Acceleration"),
            accelPGAPSens:cordova.require("cordova/plugin/accelerometer"),


            color:'#FF8C00',
            sensorID:'Accelerometer',


            // Flag indicates whether this sensor type is supported by the device or not.
            availability:null,
            isAvailable:function() {
                accelPGAPSens.getCurrentAcceleration(
                        function(x){availability = true;}, 
                        function(){availability = false;});                  
            },

       }
})
.done(function(script, textStatus) {

    map["Accelerometer"] = this.AccelerometerSensor;
    alert('done');
 })
.fail(function(jqxhr, settings, exception) {  
    alert('fail');
});

Now I want to call the isAvailable function, so I wrote this code:

map["Accelerometer"].isAvailable()

But I got a TypeError:

"cannot call method 'isAvalable' of at undefined..."

What am I doing wrong? can anyone please show me what I have to do?

Thanks!!!

pvnarula · Accepted Answer · 2013-06-06 11:15:07Z

2

You are using :-

map["Accelerometer"] = this.AccelerometerSensor;

But "this" in done is different context i.e. global.

var map = {}, AccelerometerSensor;

// Allow jQuery to cash the cordova.js
$.ajaxSetup({  cache: true});

$.getScript("cordova-2.6.0.js",function(){

    AccelerometerSensor = {
            accelJSONObj:cordova.require("cordova/plugin/Acceleration"),
            accelPGAPSens:cordova.require("cordova/plugin/accelerometer"),


            color:'#FF8C00',
            sensorID:'Accelerometer',


            // Flag indicates whether this sensor type is supported by the device or not.
            availability:null,
            isAvailable:function() {
                accelPGAPSens.getCurrentAcceleration(
                        function(x){availability = true;}, 
                        function(){availability = false;});                  
            },

       }
})
.done(function(script, textStatus) {

    map["Accelerometer"] = AccelerometerSensor;
    alert('done');
 })
.fail(function(jqxhr, settings, exception) {  
    alert('fail');

edited Jun 6, 2013 at 11:15

answered Jun 6, 2013 at 11:08

pvnarula

2,84120 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

RRR Over a year ago

it's working now! thanks!. Just one another question now I am getting an error about the using of accelPGAPSens variable at the isAvailable() function that its not defined - can you please help me? thanks!

pvnarula Over a year ago

Try to use this.accelPGAPSens

Collectives™ on Stack Overflow

JavaScript - cannot call my object's methods

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related