Detect if a visitor is logged into Facebook without using any Facebook API.
Basically use response code from a server when try to load a hidden user profile.
If profile fail loading the user not logged. If profile loading success the user logged in facebook.
<!-- FB Logged user detector
DREAMSNET.IT - IT Solutions di Marco Marcoaldi
[email protected]
www.dreamsnet.it
-->
<script type="text/javascript"
src="https://www.facebook.com/people/Jens-Lübberstedt/1009310897"
onload="alert('Loggato a Facebook')"
onerror="alert('Non loggato a Facebook')">
</script>
Please Whitelist JSFiddle in your content blocker.
Help keep JSFiddle free for always by one of two ways:
Whitelist JSFiddle in your content blocker (two clicks)
Go PRO and get access to additional PRO features →
Join the 4+ million users, and keep the JSFiddle dream alive.
Ad-free
All ads in the editor and listing pages are turned completely off.
Use pre-released features
You get to try and use features (like the Palette Color Generator) months before everyone else.
Fiddle collections
Sort and categorize your Fiddles into multiple collections.
Private collections and fiddles
You can make as many Private Fiddles, and Private Collections as you wish!
Console
Debug your Fiddle with a minimal built-in JavaScript console.