jQuery being transpiled to Ember.$

[spansh]

I recently upgraded a bunch of things (including ember) in one of my apps. Now I've fixed most of the issues I'm left with one which I can't seem to track down.

In my code I have sections like

import jQuery from 'jquery';

            jQuery.ajax({
                url: url,
                method: 'HEAD'
            }).then(function(data,textStatus,response) {
                let details = {
                    name: file,
                    url: url,
                    size: response.getResponseHeader('Content-Length'),
                    modified: moment.utc(response.getResponseHeader('Last-Modified'))
                };
                let fileDetails = route.fileDetails;
                fileDetails[file] = details;
                route.set("fileDetails",fileDetails);
                controller.set("files",Object.keys(fileDetails).map( key => fileDetails[key] ));
            });

Which when I run it under ember serve is getting transpiled to:

        Ember.$.ajax({
          url: url,
          method: 'HEAD'
        }).then(function (data, textStatus, response) {
          var details = {
            name: file,
            url: url,
            size: response.getResponseHeader('Content-Length'),
            modified: _moment.default.utc(response.getResponseHeader('Last-Modified'))
          };
          var fileDetails = route.fileDetails;
          fileDetails[file] = details;
          route.set("fileDetails", fileDetails);
          controller.set("files", Object.keys(fileDetails).map(function (key) {
            return fileDetails[key];
          }));
        });

I've tried looking for addons or plugins which could be causing this and I've tried rebuilding node_modules and each time the deprecation warning remains. I asked around on the ember discord and noone seemed to have any ideas. I spent several hours grepping through my node_modules directory hoping to find something that referenced jQuery and set it up to be transpiled but at the moment I'm basically looking for a needle in a haystack. Is there any way I can find out exactly where/why this is being transpiled?

[spansh]

I believe I have finally managed to track down the error.

I had done ember install ember-jquery which was tripping ember-cli-babel, specifically the _shouldBlacklistJQuery function. Uninstalling and reinstalling it with ember install @ember/jquery has solved the problem. It may be worth adjusting the function to account for this.