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Can any one tell me how exactly the FB API works. It looks to be a basic question but I am really confused.
Question: I have onlogin(). When I click the login button, I am expecting it to call this function. But in the code I pasted: I see that alert-test is printed first and than the FB.api is called.
So, it looks like onlogin is called first, then the FB API ...is there a way I can call this function only once.
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({appId: 'XXX', status: true, cookie: true, xfbml: true});
};
(function() {
var e = document.createElement('script'); e.async = true;
e.src = document.location.protocol +
'//connect.facebook.net/en_US/all.js';
document.getElementById('fb-root').appendChild(e);
}());
function checkFacebookLogin() {
FB.api('/me', function(response) {
alert("Name: "+ response.name + "\nFirst name: "+ response.first_name + "ID: "+response.id);
});
alert('test');
}
</script>
<p id="fb_login_button_1"><fb:login-button onlogin="checkFacebookLogin();" size="medium" scope="user_about_me">Sign in using Facebook</fb:login-button></p>
</body>v
My main issue is the function should be called only once....but it is getting called twice.
986
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({appId: 'XXX', status: true, cookie: true, xfbml: true});
};
(function() {
var e = document.createElement('script'); e.async = true;
e.src = document.location.protocol +
'//connect.facebook.net/en_US/all.js';
document.getElementById('fb-root').appendChild(e);
}());
function fetchUserDetail()
{
FB.api('/me', function(response) {
alert("Name: "+ response.name + "\nFirst name: "+ response.first_name + "ID: "+response.id);
});
}
function checkFacebookLogin()
{
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
fetchUserDetail();
}
else
{
initiateFBLogin();
}
});
}
function initiateFBLogin()
{
FB.login(function(response) {
fetchUserDetail();
});
}
</script>
<input type="button" value="Sign in using Facebook" onclick="checkFacebookLogin();"/>
</body>
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