Tag Archives: facebook

Mootools conflicting with FB.ui (Uncaught TypeError: Cannot read property ‘className’ of undefined)

By admin | Published: July 7, 2011
I just spent a few hours running down a gnarly bug that became an issue on production late last night.  All of the FB.ui dialog calls began to fail on our website with a Javascript exception. After much trial and error, I was able to determine that Mootools was the root cause.  Without Mootools, everything […]
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