Railstic » rjs http://railstic.com sharing experiences Mon, 29 Aug 2011 00:31:45 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 How to check if a div exists in rjs? http://railstic.com/2008/08/how-to-check-if-a-div-exists-in-rjs/ http://railstic.com/2008/08/how-to-check-if-a-div-exists-in-rjs/#comments Sun, 24 Aug 2008 17:52:36 +0000 İ. Emre Kutlu http://izzetemrekutlu.com/blog/?p=3 

<body>
   <div id='main'>
      Main Div
   </div>
</body>

render :update do |page|
   page << "if ($('main')){"
   page.replace_html 'main', :inline => 'Here it is'
   page << "}"
end

This ruby code checks if there is a DOM object that its id = “main”.
If there is then changes its content to “Here it is”, if there is not do nothing.

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