this is my code:
function User() {
var self = this;
FB.api(someurl, function (response) {
self.id = response.id;
});
}
I can't get the id going like this:
var user = new User();
console.log(user.id);
Add a comment
|
3 Answers
FB.api is an asynchronous function with a callback. At the time you read user.id the callback function has not been called yet.
Maybe you should move the async initialization out of the constructor, adding an explicit "init" function:
function User() {
var self = this;
this.init = function(onCompletion) {
FB.api(someurl, function (response) {
self.id = response.id;
if (onCompletion) onCompletion();
});
}
}
var user = new User();
user.init(function(){
console.log(user.id);
});
2 Comments
Simone Tolomelli
Ok then, how would I do that? I just want to store response.id and response.email in order to use them several time without calling FB.login.
Marco Amendola
It's fine to store them for later use; you just have to be sure to not access those cached values before they are loaded. If you need them as soon as possible, use the init callback.
try
FB.api(someurl, function(response) {
console.log(response);
});
and post here response value.
3 Comments
Simone Tolomelli
everything's fine with response. {name:"some name", email: "[email protected]", id:123456789}
Emidio Picariello
so try: function User() { var self = this; self.id = 123456; } var user = new User(); console.log(user.id); what do you get?
Simone Tolomelli
123456. the problem is getting the value within FB.api
Try defining a pattern where you initialize your object, then using a callback in your asynchronous request. Something like this:
function User() {
var self = this;
self.init = function(cb) {
FB.api(someurl, function (response) {
self.id = response.id;
if (cb) {
cb();
}
});
}
}
then
var user = new User();
user.init(function() { console.log(user.id); });