I had a coworker who did similar. It was essentially the entire frontend for an order application (back in the jQuery days), a few thousand lines. That was al

I had a coworker who did similar. It was essentially the entire frontend for an order application (back in the jQuery days), a few thousand lines. That was all copy/pasted, changed to deal with the case of when there are no orders (which only ever happens once since this was an in-house system) and those massive chunks were wrapped in an if/else.