PhoneGap App object functions not execut

Question

i have very interesting problem in my Phonegap App for WP8.1. When i use function

document.addEventListener("deviceready",onDeviceReady,false);

function onDeviceReady(){
  **obj.alertFunction();**
}

var obj = {
   alertFunction: function(){alert('HelloWorld');}
}

nothing is happen, but when i use only alertFunction(); where alertFunction is

function alertFunction(){
  alert('Hello');
}

all is OK. On Android is all OK and on Ripple Simulator too. only on Windows Phone device i have this problem. THX for answer :)

score 0 · Answer 1 · edited May 23 '17 at 11:43

It could be because you are using a function expression in the first case but a function statement in the second case for the alert. Function expressions are executed in a procedural fashion. Try changing the execution order:

function onDeviceReady(){
  **obj.alertFunction();**
}

var obj = {
   alertFunction: function(){alert('HelloWorld');}
}   

document.addEventListener("deviceready",onDeviceReady,false);

Here's a snippet illustrating the difference:

OnDeviceReady() executed on top:

onDeviceReady();

function onDeviceReady(){
  obj.alertFunction();
}

var obj = {
   alertFunction: function(){alert('HelloWorld');}
}

Nothing happens

OnDeviceReady() executed at the bottom:

function onDeviceReady(){
  obj.alertFunction();
}

var obj = {
   alertFunction: function(){alert('HelloWorld');}
}    

onDeviceReady();

Alert is triggered

If changing the execution doesn't work, you might need to rewrite your code into a function statement.

PhoneGap App object functions not execut

1 Answers1