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Never render the full layout in a Rails view when called via AJAX

Essential for degradable javascript, when one never knows if a view or partial is being called via XmlHttpRequest or not. Throw the below code in your ApplicationController (application.rb)

More info in this blog post

def render(*args)
        args.first[:layout] = false if request.xhr? and args.first[:layout].nil?
        super
end
to ruby rails javascript rubyonrails ajax programming jquery degradation degradable by jamiew on Sep 09, 2007
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