This is not entirely true. These articles are referring to the mobile services. The majority of LIs services are built in Java (with some Node, Python, Scala sprinkled in).
The bulletproof way would probably be to use a library to handle drag and drop. If you're not wanting to use jQuery UI just for DnD functionality, there are a couple libraries that do drag and drop exclusively.
Columbus, Ohio. It very much is a big city with a small town feel. You can get a place in or around the city for less that $1k easily. We have a thriving art and music scene, a couple professional sports teams (NHL & MLS). We have the third largest university campus in the US (OSU) so they're a lot of young, smart people around. We may not have the largest startup scene, but it's definitely growing with people doing interesting things.
Here's a write up from the LI engineering blog briefly detailing a history of their architecture (up to 2015): https://engineering.linkedin.com/architecture/brief-history-...