can not find out if the div element is already set in body in chrome extension

Posted by alpham8 on Stack Overflow See other posts from Stack Overflow or by alpham8
Published on 2013-10-25T09:51:35Z Indexed on 2013/10/25 9:53 UTC
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in my chrome extension I got an div, which I will add to the body of the current tab. I am listening to chrome.tabs.onUpdated. If this event is called, I execute a script inside content_scripts. In this function there I´ll wait till the document is ready with jQuery $(document).ready(...). I try to access

$("#div").length

and sometimes it returns 1 and sometimes 0. It should added to the body, if it´s not already there.

For some strange reasons, the onUpdated event is called twice on each page reload. Actually I found no way to check safely if the div was already added.

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