Access a local variable from a callback function

Question

I'm trying to update a local variable in a function with the returned data from a callback function. But it's looking like the callback function doesn't have access to it.

Below is what I'm working with:

this.renderUI = function(res) {
    var connected = (res.user != null && res.user.isConnected);
    if(connected) {
      $j('#jive-modal-invite').trigger('close'); 
      var contactsData = gigya.socialize.getContacts({callback: getContacts_callback });
      console.log(contactsData);  
    }else {
      console.log('openid disconnected');
    }   
  };

  function getContacts_callback(response) {
    return response;
  }

The callback is asynchronous, so it does not know about the local variable. — Rob
– Rob, Commented Sep 11, 2013 at 8:55
Am I missing something here? Why is your callback like: gigya.socialize.getContacts({callback: function(response){ instead of gigya.socialize.getContacts(function(response){? — Andy
– Andy, Commented Sep 11, 2013 at 9:02
If getContacts is asynchronous, you simply cannot (and should not). Put the logging statements (and everything else the accesses contactsData) in the callback — Bergi
– Bergi, Commented Sep 11, 2013 at 11:20
@Bergi I can't access global variables from the callback either. Is this a known behaviour? — drecute
– drecute, Commented Sep 12, 2013 at 5:08

0x_Anakin · Accepted Answer · 2013-09-11 08:58:52Z

1

console.log(contactsData); is being executed before your callback is complete try this:

  gigya.socialize.getContacts({callback: function(response){
    contactsData['contacts'] = response;
    console.log(contactsData); 
  } });

answered Sep 11, 2013 at 8:58

0x_Anakin

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2 Comments

drecute Over a year ago

I need contactsData outside of the callback scope

0x_Anakin Over a year ago

How about calling a function from inside your callback?

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