Prevent pop-ups from being blocked

I am using a Facebook login method in my code on page load, but when I execute this code, the pop-up blocker closes the Facebook permission window.

How can I open this window with Javascript without needing to mak开发者_运维技巧e an exception in the pop-up blocker?

Below is my code:

FB.login(function(response)
{
    if(response.session!=null)
    {
        window.location.href='http://example.com';
    }
},
{ perms: 'email,user_birthday,publish_stream' });

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You can do something like -

var uri = encodeURI('http://example.com');
FB.getLoginStatus(function(response) {
      if (response.status === 'connected') {
                window.location.href=uri;
      } else {
         window.location = encodeURI("https://www.facebook.com/dialog/oauth?client_id=YOUR_APP_ID&redirect_uri="+uri+"&response_type=token");
      }

This will just redirect directly instead of opening a pop-up

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This is specifically denied in the documentation:

"You should only call this on a user event as it opens a popup. Most browsers block popups, unless they were initiated from a user event, such as a click on a button or a link."

It's also simply poor UX.

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There'd be no point in popup blockers existing if you could just code around them. You'll either need to find a method that doesn't use a popup or require some user interaction with the browser to open the popup.

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Yeah you need to call it with a user event, but strictly the onclick event, not any other:

<a href="#" onclick="fbLogin()"> Login</a> <!-- works -->

<a href="#" onmousedown="fbLogin()"> Login</a> <!-- doesnt work -->

<a href="#" onmouseup="fbLogin()"> Login</a> <!-- doesnt work -->

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If you try to open a popup automatically then there is a high possibility that popup blockers will become activated, as far as I know, it has to be based on some User action, for example click of a button. Try to execute this code on click of a button, it should work.