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Facebook JS failure affects all login methods
 
   
  
 
 
It appears that if the Facebook Javascript is blocked, it casues a Javascript error that prevents other login methods from working as well.
 
I get this if I visit this site (askbot.org) with FireFox with NoScript installed and facebook.net not allowed. None of the login methods work, and the error console shows an "FB not defined" error.
 
If I allow facebook.net in No Script everything works.
 
 
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 Evgeny's avatar

      13.2k
    
 
 
 
 Evgeny 
 
 
    updated 14 years ago 
 
 
 
 
 graeme's avatar

      319
    
 
 
 
 graeme 
 
 
    asked 14 years ago 
 
 
 
 
        
 
 
 
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        good point. This will also happen if FB keys are set incorrectly.
      
 
 Evgeny's avatar Evgeny (14 years ago)   
 
 
  
 
 
  
 
 

        I guess it will also happen if facebook.net is unavailable for any other reason: its deliberately blocked, network failure, etc?
      
 
 graeme's avatar graeme (14 years ago)   
 
 
  
 
 
  
 
 

        Could you not fix this by adding "if (typeof FB != 'undefined')" like Jwuery openid does?
      
 
 graeme's avatar graeme (14 years ago)   
 
 
  
 
 
  
 
 

        looking into it now...
      
 
 Evgeny's avatar Evgeny (14 years ago)   
 
 
  
 
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I've applied the if (typeof FB != 'undefined') to the signin page and that appears to solve part of the problem that you can login even if the facebook keys are incorrect, but it's still impossible to log out in that case. 
 
If the keys are fine or if they are absent, both login and log out work.
 
Do you still see the issue that you found on this site? Could you try logging out with the NoScript  on and Facebook disallowed? 
 
edit: seems to work for me.
 
As for the "no script" option - this site requires javascript.
Entire site is browsable without the js, but you can't log in at this point - is this a big problem?
 
 
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 Evgeny's avatar

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 Evgeny 
 
 
    updated 14 years ago,
        
    answered 14 years ago 
 
 
 
 
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        Works for me too. I do not think that being unable to login without Javascript is that much of an issue as its fairly obvious what site you need to enable to login, and its not worth fixing unless everything is going to work after you login as well. The problem I had was the FB Javascript failing was that it was not obvious what the problem was - especially using the Chrome FB blocking extension.
      
 
 graeme's avatar graeme (14 years ago)   
 
 
  
 
 
  
 
 

        It might be my typing, but the wrong password version of the local login box does not seem to work either (I noticed earlier, but thought I had just got the password wrong again).
      
 
 graeme's avatar graeme (14 years ago)   
 
 
  
 
 
  
 
 

        I have thought of one reason why being able to login without Javascript would be good: it would ameliorate the effects of any future Javascript issues. If we had been able to login without Javascript then the problem with Facebook would only have affected those using Facebook to login.
      
 
 graeme's avatar graeme (14 years ago)   
 
 
  
 
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