javascript - $ undefined error -

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i'm developing chrome extension , i've got following...

 $(document).keypress(function(event){ resizedialogiframe(overlaydiv, iframe.contentwindow); });

but when executed i'm getting following error...

uncaught referenceerror: $ not defined

however, $('form[name="gs"]').attr('action'); working fine elsewhere in page.. what's going wrong?

if jquery loaded correctly (?) try pattern make sure $ references jquery object.

(function($) {      $(function() {          $(document).keypress(function(event){ resizedialogiframe(overlaydiv, iframe.contentwindow); });      }); }(jquery));

if doesn't help, check if jquery loaded correctly. thatfore, call

alert('jquery' in window);

if alerts false, wrong.


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