Question

after upgrade to new worpdress jquery stop working.

Uncaught TypeError: Cannot read property 'expr' of undefined
2
Uncaught TypeError: Property 'jQuery' of object [object Window] is not a function www.xxx.si:313
Uncaught TypeError: Property 'jQuery' of object [object Window] is not a function thickbox.js:18
Uncaught TypeError: undefined is not a function jquery.form.min.js:12
Uncaught TypeError: undefined is not a function scripts.js:3
Uncaught TypeError: Property 'jQuery' of object [object Window] is not a function 
Uncaught TypeError: Property 'jQuery' of object [object Window] is not a function 

details for example:

cannot read property 'expr' of undefined

jQuery.extend(jQuery.expr[‘:’], {

undefined is not a function scripts.js:3
$(function() {

what is wrong? how can I solve this?

EDIT:

Mat help me to find this noConflict jquery which is part of event calendar plugin

// jQuery DOM extreme protection management
    $options = get_option('optionsEventsCalendar');
   echo ' <script type="text/javascript">',"\n\t";
   echo '// <![CDATA[',"\n\t";
   echo 'var ecd = {};',"\n\t";
   echo 'ecd.jq = jQuery.noConflict('.$options['jqueryextremstatus'].');',"\n\t";
   echo '//]]>',"\n";
   echo ' </script>',"\n";
    echo "<!-- End Of Script Generated By Events-Calendar - ".EVENTSCALENDARVERS." -->\n";

Answer 1

Your code on http://www.mdns-maribor.si uses $.noConflict:

<script type="text/javascript">
// <![CDATA[
var ecd = {};
ecd.jq = jQuery.noConflict(true);
//]]>
</script>

This will remove the jQuery and $ variables. You don’t need jQuery.noConflict unless you want to override the jQuery and $ values. If you do need it wait until the rest of the code has run before calling it.