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- var yl = yl || {};
- if (typeof django !== 'undefined' && typeof django.jQuery !== 'undefined') {
- // If django.jQuery is already defined, use it.
- yl.jQuery = django.jQuery;
- }
- else {
- // We include jquery itself in our widget's media, because we need it.
- // Normally, we expect our widget's reference to admin/js/vendor/jquery/jquery.js
- // to be skipped, because django's own code has already included it.
- // However, if django.jQuery is NOT defined, we know that jquery was not
- // included before we did it ourselves. This can happen if we're not being
- // rendered in a django admin form.
- // However, someone ELSE'S jQuery may have been included before ours, in
- // which case we must ensure that our jquery doesn't override theirs, since
- // it might be a newer version that other code on the page relies on.
- // Thus, we must run jQuery.noConflict(true) here to move our jQuery out of
- // the way.
- yl.jQuery = jQuery.noConflict(true);
- }
- // In addition to all of this, we must ensure that the global jQuery and $ are
- // defined, because Select2 requires that. jQuery will only be undefined at
- // this point if only we or django included it.
- if (typeof jQuery === 'undefined') {
- jQuery = yl.jQuery;
- $ = yl.jQuery;
- }
- else {
- // jQuery IS still defined, which means someone else also included jQuery.
- // In this situation, we need to store the old jQuery in a
- // temp variable, set the global jQuery to our yl.jQuery, then let select2
- // set itself up. We restore the global jQuery to its original value in
- // jquery.post-setup.js.
- dal_jquery_backup = jQuery.noConflict(true);
- jQuery = yl.jQuery;
- }
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