Hi Dave,
The above error was not thrown when import 'jquery.event.drag' was added to column_selector_spec.js (although it was giving some other error, but above was cleared).
So the doubt was on webpack as it was not importing jquery.event.drag even though it was added using imports-loader, the below test:
test: /.*slickgrid\/+slick\.(?!core)*/,
loader: 'imports-loader?' +
'jquery.ui' +
',jquery.event.drag' +
',slickgrid',
I noticed later that the test regex is not just for files but also included path. So, gave try by replacing "\/" with "\\" and it worked.
But then this will not work on Unix, and so changed it to [\\\/]+ taking both styles.
